結果
| 問題 | No.1388 Less than K |
| ユーザー |
 jell
|
| 提出日時 | 2021-02-19 13:53:27 |
| 言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
| 結果 |
AC
|
| 実行時間 | 289 ms / 3,000 ms |
| コード長 | 65,061 bytes |
| コンパイル時間 | 4,941 ms |
| コンパイル使用メモリ | 287,096 KB |
| 実行使用メモリ | 11,404 KB |
| 最終ジャッジ日時 | 2024-09-16 03:17:09 |
| 合計ジャッジ時間 | 15,708 ms |
|
ジャッジサーバーID （参考情報） |
judge5 / judge4 |
（要ログイン）
テストケース
テストケース表示| 入力 | 結果 | 実行時間 実行使用メモリ |
|---|---|---|
| testcase_00 | AC | 2 ms
5,248 KB |
| testcase_01 | AC | 2 ms
5,248 KB |
| testcase_02 | AC | 2 ms
5,376 KB |
| testcase_03 | AC | 2 ms
5,376 KB |
| testcase_04 | AC | 3 ms
5,376 KB |
| testcase_05 | AC | 8 ms
5,376 KB |
| testcase_06 | AC | 3 ms
5,376 KB |
| testcase_07 | AC | 3 ms
5,376 KB |
| testcase_08 | AC | 9 ms
5,376 KB |
| testcase_09 | AC | 4 ms
5,376 KB |
| testcase_10 | AC | 4 ms
5,376 KB |
| testcase_11 | AC | 4 ms
5,376 KB |
| testcase_12 | AC | 10 ms
5,376 KB |
| testcase_13 | AC | 14 ms
5,376 KB |
| testcase_14 | AC | 24 ms
5,376 KB |
| testcase_15 | AC | 38 ms
5,376 KB |
| testcase_16 | AC | 48 ms
5,376 KB |
| testcase_17 | AC | 87 ms
5,376 KB |
| testcase_18 | AC | 113 ms
5,612 KB |
| testcase_19 | AC | 136 ms
6,152 KB |
| testcase_20 | AC | 141 ms
6,204 KB |
| testcase_21 | AC | 172 ms
6,256 KB |
| testcase_22 | AC | 92 ms
6,376 KB |
| testcase_23 | AC | 29 ms
5,376 KB |
| testcase_24 | AC | 36 ms
5,376 KB |
| testcase_25 | AC | 42 ms
5,376 KB |
| testcase_26 | AC | 46 ms
5,376 KB |
| testcase_27 | AC | 39 ms
5,376 KB |
| testcase_28 | AC | 47 ms
5,376 KB |
| testcase_29 | AC | 44 ms
5,376 KB |
| testcase_30 | AC | 4 ms
5,376 KB |
| testcase_31 | AC | 21 ms
5,376 KB |
| testcase_32 | AC | 3 ms
5,376 KB |
| testcase_33 | AC | 103 ms
6,760 KB |
| testcase_34 | AC | 98 ms
6,632 KB |
| testcase_35 | AC | 91 ms
6,372 KB |
| testcase_36 | AC | 82 ms
5,916 KB |
| testcase_37 | AC | 117 ms
7,148 KB |
| testcase_38 | AC | 110 ms
5,952 KB |
| testcase_39 | AC | 127 ms
5,824 KB |
| testcase_40 | AC | 141 ms
5,880 KB |
| testcase_41 | AC | 275 ms
7,604 KB |
| testcase_42 | AC | 161 ms
6,112 KB |
| testcase_43 | AC | 194 ms
7,292 KB |
| testcase_44 | AC | 180 ms
7,300 KB |
| testcase_45 | AC | 171 ms
7,164 KB |
| testcase_46 | AC | 223 ms
7,440 KB |
| testcase_47 | AC | 204 ms
7,160 KB |
| testcase_48 | AC | 189 ms
7,220 KB |
| testcase_49 | AC | 212 ms
7,348 KB |
| testcase_50 | AC | 203 ms
7,300 KB |
| testcase_51 | AC | 174 ms
7,300 KB |
| testcase_52 | AC | 189 ms
7,396 KB |
| testcase_53 | AC | 285 ms
7,660 KB |
| testcase_54 | AC | 213 ms
7,460 KB |
| testcase_55 | AC | 256 ms
11,404 KB |
| testcase_56 | AC | 190 ms
7,520 KB |
| testcase_57 | AC | 222 ms
7,420 KB |
| testcase_58 | AC | 205 ms
7,480 KB |
| testcase_59 | AC | 175 ms
7,452 KB |
| testcase_60 | AC | 192 ms
7,424 KB |
| testcase_61 | AC | 119 ms
7,232 KB |
| testcase_62 | AC | 123 ms
7,396 KB |
| testcase_63 | AC | 252 ms
8,716 KB |
| testcase_64 | AC | 244 ms
7,436 KB |
| testcase_65 | AC | 218 ms
7,528 KB |
| testcase_66 | AC | 289 ms
7,684 KB |
| testcase_67 | AC | 201 ms
7,472 KB |
| testcase_68 | AC | 185 ms
7,480 KB |
| testcase_69 | AC | 204 ms
7,328 KB |
| testcase_70 | AC | 180 ms
7,456 KB |
| testcase_71 | AC | 225 ms
7,456 KB |
| testcase_72 | AC | 128 ms
7,308 KB |
| testcase_73 | AC | 133 ms
7,424 KB |
| testcase_74 | AC | 153 ms
7,728 KB |
| testcase_75 | AC | 181 ms
7,868 KB |
| testcase_76 | AC | 228 ms
8,592 KB |
ソースコード
#line 1 "other/y.cc"
// #undef _GLIBCXX_DEBUG
// #define NDEBUG
#include <bits/extc++.h>
#line 2 "Library/lib/alias"
/**
* @file alias
* @brief Alias
*/
#line 13 "Library/lib/alias"
#line 2 "Library/lib/bit"
#if __cplusplus > 201703L
#include <bit>
#else
#ifndef _GLIBCXX_BIT
#define _GLIBCXX_BIT 1
#include <limits>
#include <type_traits>
namespace std {
template <typename _Tp> constexpr _Tp __rotl(_Tp __x, int __s) noexcept {
constexpr auto _Nd = numeric_limits<_Tp>::digits;
const int __r = __s % _Nd;
if (__r == 0)
return __x;
else if (__r > 0)
return (__x << __r) | (__x >> ((_Nd - __r) % _Nd));
else
return (__x >> -__r) | (__x << ((_Nd + __r) % _Nd)); // rotr(x, -r)
}
template <typename _Tp> constexpr _Tp __rotr(_Tp __x, int __s) noexcept {
constexpr auto _Nd = numeric_limits<_Tp>::digits;
const int __r = __s % _Nd;
if (__r == 0)
return __x;
else if (__r > 0)
return (__x >> __r) | (__x << ((_Nd - __r) % _Nd));
else
return (__x << -__r) | (__x >> ((_Nd + __r) % _Nd)); // rotl(x, -r)
}
template <typename _Tp> constexpr int __countl_zero(_Tp __x) noexcept {
constexpr auto _Nd = numeric_limits<_Tp>::digits;
if (__x == 0) return _Nd;
constexpr auto _Nd_ull = numeric_limits<unsigned long long>::digits;
constexpr auto _Nd_ul = numeric_limits<unsigned long>::digits;
constexpr auto _Nd_u = numeric_limits<unsigned>::digits;
if _GLIBCXX17_CONSTEXPR (_Nd <= _Nd_u) {
constexpr int __diff = _Nd_u - _Nd;
return __builtin_clz(__x) - __diff;
} else if _GLIBCXX17_CONSTEXPR (_Nd <= _Nd_ul) {
constexpr int __diff = _Nd_ul - _Nd;
return __builtin_clzl(__x) - __diff;
} else if _GLIBCXX17_CONSTEXPR (_Nd <= _Nd_ull) {
constexpr int __diff = _Nd_ull - _Nd;
return __builtin_clzll(__x) - __diff;
} else // (_Nd > _Nd_ull)
{
static_assert(_Nd <= (2 * _Nd_ull),
"Maximum supported integer size is 128-bit");
unsigned long long __high = __x >> _Nd_ull;
if (__high != 0) {
constexpr int __diff = (2 * _Nd_ull) - _Nd;
return __builtin_clzll(__high) - __diff;
}
constexpr auto __max_ull = numeric_limits<unsigned long long>::max();
unsigned long long __low = __x & __max_ull;
return (_Nd - _Nd_ull) + __builtin_clzll(__low);
}
}
template <typename _Tp> constexpr int __countl_one(_Tp __x) noexcept {
if (__x == numeric_limits<_Tp>::max()) return numeric_limits<_Tp>::digits;
return __countl_zero<_Tp>((_Tp)~__x);
}
template <typename _Tp> constexpr int __countr_zero(_Tp __x) noexcept {
constexpr auto _Nd = numeric_limits<_Tp>::digits;
if (__x == 0) return _Nd;
constexpr auto _Nd_ull = numeric_limits<unsigned long long>::digits;
constexpr auto _Nd_ul = numeric_limits<unsigned long>::digits;
constexpr auto _Nd_u = numeric_limits<unsigned>::digits;
if _GLIBCXX17_CONSTEXPR (_Nd <= _Nd_u)
return __builtin_ctz(__x);
else if _GLIBCXX17_CONSTEXPR (_Nd <= _Nd_ul)
return __builtin_ctzl(__x);
else if _GLIBCXX17_CONSTEXPR (_Nd <= _Nd_ull)
return __builtin_ctzll(__x);
else // (_Nd > _Nd_ull)
{
static_assert(_Nd <= (2 * _Nd_ull),
"Maximum supported integer size is 128-bit");
constexpr auto __max_ull = numeric_limits<unsigned long long>::max();
unsigned long long __low = __x & __max_ull;
if (__low != 0) return __builtin_ctzll(__low);
unsigned long long __high = __x >> _Nd_ull;
return __builtin_ctzll(__high) + _Nd_ull;
}
}
template <typename _Tp> constexpr int __countr_one(_Tp __x) noexcept {
if (__x == numeric_limits<_Tp>::max()) return numeric_limits<_Tp>::digits;
return __countr_zero((_Tp)~__x);
}
template <typename _Tp> constexpr int __popcount(_Tp __x) noexcept {
constexpr auto _Nd = numeric_limits<_Tp>::digits;
if (__x == 0) return 0;
constexpr auto _Nd_ull = numeric_limits<unsigned long long>::digits;
constexpr auto _Nd_ul = numeric_limits<unsigned long>::digits;
constexpr auto _Nd_u = numeric_limits<unsigned>::digits;
if _GLIBCXX17_CONSTEXPR (_Nd <= _Nd_u)
return __builtin_popcount(__x);
else if _GLIBCXX17_CONSTEXPR (_Nd <= _Nd_ul)
return __builtin_popcountl(__x);
else if _GLIBCXX17_CONSTEXPR (_Nd <= _Nd_ull)
return __builtin_popcountll(__x);
else // (_Nd > _Nd_ull)
{
static_assert(_Nd <= (2 * _Nd_ull),
"Maximum supported integer size is 128-bit");
constexpr auto __max_ull = numeric_limits<unsigned long long>::max();
unsigned long long __low = __x & __max_ull;
unsigned long long __high = __x >> _Nd_ull;
return __builtin_popcountll(__low) + __builtin_popcountll(__high);
}
}
template <typename _Tp> constexpr bool __has_single_bit(_Tp __x) noexcept {
return __popcount(__x) == 1;
}
template <typename _Tp> constexpr _Tp __bit_ceil(_Tp __x) noexcept {
constexpr auto _Nd = numeric_limits<_Tp>::digits;
if (__x == 0 || __x == 1) return 1;
auto __shift_exponent = _Nd - __countl_zero((_Tp)(__x - 1u));
#ifdef _GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED
if (!__builtin_is_constant_evaluated()) {
__glibcxx_assert(__shift_exponent != numeric_limits<_Tp>::digits);
}
#endif
using __promoted_type = decltype(__x << 1);
if _GLIBCXX17_CONSTEXPR (!is_same<__promoted_type, _Tp>::value) {
const int __extra_exp = sizeof(__promoted_type) / sizeof(_Tp) / 2;
__shift_exponent |= (__shift_exponent & _Nd) << __extra_exp;
}
return (_Tp)1u << __shift_exponent;
}
template <typename _Tp> constexpr _Tp __bit_floor(_Tp __x) noexcept {
constexpr auto _Nd = numeric_limits<_Tp>::digits;
if (__x == 0) return 0;
return (_Tp)1u << (_Nd - __countl_zero((_Tp)(__x >> 1)));
}
template <typename _Tp> constexpr _Tp __bit_width(_Tp __x) noexcept {
constexpr auto _Nd = numeric_limits<_Tp>::digits;
return _Nd - __countl_zero(__x);
}
} // namespace std
#endif
#endif
#line 2 "Library/lib/limits"
#line 4 "Library/lib/limits"
namespace std {
#if defined(__STRICT_ANSI__) && defined(__SIZEOF_INT128__)
template <> struct numeric_limits<__uint128_t> {
constexpr static __uint128_t max() { return ~__uint128_t(0); }
constexpr static __uint128_t min() { return 0; }
};
template <> struct numeric_limits<__int128_t> {
constexpr static __int128_t max() {
return numeric_limits<__uint128_t>::max() >> 1;
}
constexpr static __int128_t min() { return -max() - 1; }
};
#endif
} // namespace std
#line 16 "Library/lib/alias"
namespace workspace {
constexpr char eol = '\n';
using namespace std;
using i32 = int_least32_t;
using u32 = uint_least32_t;
using i64 = int_least64_t;
using u64 = uint_least64_t;
#ifdef __SIZEOF_INT128__
using i128 = __int128_t;
using u128 = __uint128_t;
#else
#warning 128bit integer is not available.
#endif
template <class T, class Comp = less<T>>
using priority_queue = std::priority_queue<T, vector<T>, Comp>;
template <class T> using stack = std::stack<T, vector<T>>;
template <typename _Tp> constexpr _Tp __bsf(_Tp __x) noexcept {
return std::__countr_zero(__x);
}
template <typename _Tp> constexpr _Tp __bsr(_Tp __x) noexcept {
return std::__bit_width(__x) - 1;
}
} // namespace workspace
#line 2 "Library/lib/cxx20"
/*
* @file cxx20
* @brief C++20 Features
*/
#line 9 "Library/lib/cxx20"
#if __cplusplus <= 201703L
#include <algorithm>
#include <vector>
namespace std {
/*
* @fn erase_if
* @brief Erase the elements of a container that do not satisfy the condition.
* @param __cont Container.
* @param __pred Predicate.
* @return Number of the erased elements.
*/
template <typename _Tp, typename _Alloc, typename _Predicate>
inline typename vector<_Tp, _Alloc>::size_type erase_if(
vector<_Tp, _Alloc>& __cont, _Predicate __pred) {
const auto __osz = __cont.size();
__cont.erase(remove_if(__cont.begin(), __cont.end(), __pred), __cont.end());
return __osz - __cont.size();
}
/*
* @fn erase
* @brief Erase the elements of a container that are equal to the given value.
* @param __cont Container.
* @param __value Value.
* @return Number of the erased elements.
*/
template <typename _Tp, typename _Alloc, typename _Up>
inline typename vector<_Tp, _Alloc>::size_type erase(
vector<_Tp, _Alloc>& __cont, const _Up& __value) {
const auto __osz = __cont.size();
__cont.erase(remove(__cont.begin(), __cont.end(), __value), __cont.end());
return __osz - __cont.size();
}
} // namespace std
#endif
#line 2 "Library/lib/direct"
/*
* @file direct
* @brief Pragma Directive
*/
#ifdef ONLINE_JUDGE
#pragma GCC optimize("O3")
#pragma GCC target("avx,avx2")
#pragma GCC optimize("unroll-loops")
#endif
#line 8 "other/y.cc"
// #include "lib/opt"
#line 2 "Library/src/sys/clock.hpp"
/*
* @fn clock.hpp
* @brief Clock
*/
#line 9 "Library/src/sys/clock.hpp"
namespace workspace {
using namespace std::chrono;
namespace internal {
// The start time of the program.
const auto start_time{system_clock::now()};
} // namespace internal
/*
* @fn elapsed
* @return elapsed time of the program
*/
int64_t elapsed() {
const auto end_time{system_clock::now()};
return duration_cast<milliseconds>(end_time - internal::start_time).count();
}
} // namespace workspace
#line 2 "Library/src/sys/ejection.hpp"
/**
* @file ejection.hpp
* @brief Ejection
*/
#line 9 "Library/src/sys/ejection.hpp"
namespace workspace {
namespace internal {
struct ejection {
bool exit = 0;
};
} // namespace internal
/**
* @brief eject from a try block, throw nullptr
* @param arg output
*/
template <class Tp> void eject(Tp const &arg) {
std::cout << arg << "\n";
throw internal::ejection{};
}
void exit() { throw internal::ejection{true}; }
} // namespace workspace
#line 2 "Library/src/sys/iteration.hpp"
/**
* @file iteration.hpp
* @brief Case Iteration
*/
#line 9 "Library/src/sys/iteration.hpp"
#line 11 "Library/src/sys/iteration.hpp"
namespace workspace {
void main();
struct {
// 1-indexed
unsigned current{0};
unsigned total{1};
void read() { (std::cin >> total).ignore(); }
int iterate() {
static bool once = false;
assert(!once);
once = true;
while (current++ < total) {
try {
main();
} catch (internal::ejection const& status) {
if (status.exit) break;
}
}
return 0;
}
} case_info;
} // namespace workspace
#line 2 "Library/src/utils/cat.hpp"
/**
* @file cat.hpp
* @brief Cat
*/
#line 9 "Library/src/utils/cat.hpp"
namespace workspace {
template <class C1, class C2>
constexpr C1 &&cat(C1 &&__c1, C2 const &__c2) noexcept {
__c1.insert(__c1.end(), std::begin(__c2), std::end(__c2));
return __c1;
}
} // namespace workspace
#line 2 "Library/src/utils/chval.hpp"
/*
* @file chval.hpp
* @brief Change Less/Greater
*/
#line 9 "Library/src/utils/chval.hpp"
namespace workspace {
/*
* @fn chle
* @brief Substitute y for x if comp(y, x) is true.
* @param x Reference
* @param y Const reference
* @param comp Compare function
* @return Whether or not x is updated
*/
template <class Tp, class Comp = std::less<Tp>>
bool chle(Tp &x, const Tp &y, Comp comp = Comp()) {
return comp(y, x) ? x = y, true : false;
}
/*
* @fn chge
* @brief Substitute y for x if comp(x, y) is true.
* @param x Reference
* @param y Const reference
* @param comp Compare function
* @return Whether or not x is updated
*/
template <class Tp, class Comp = std::less<Tp>>
bool chge(Tp &x, const Tp &y, Comp comp = Comp()) {
return comp(x, y) ? x = y, true : false;
}
} // namespace workspace
#line 2 "Library/src/utils/fixed_point.hpp"
/**
* @file fixed_point.hpp
* @brief Fixed Point Combinator
*/
#line 9 "Library/src/utils/fixed_point.hpp"
namespace workspace {
/**
* @brief Fixed Point Combinator
*/
template <class _F> class fixed_point {
_F __fn;
public:
/**
* @param __fn 1st argument callable with the rest of its arguments, and the
* return type specified.
*/
fixed_point(_F &&__fn) noexcept : __fn(std::forward<_F>(__fn)) {}
/**
* @brief Apply *this to 1st argument.
* @param __args Rest of arguments.
*/
template <class... _Args>
decltype(auto) operator()(_Args &&... __args) const noexcept {
return __fn(*this, std::forward<_Args>(__args)...);
}
};
/**
* @brief Cached version of Fixed Point Combinator
*/
template <class _F> class cached_fixed_point {
template <class...> struct _cache;
template <class _G, class _R, class _H, class... _Args>
struct _cache<_R (_G::*)(_H, _Args...) const>
: std::map<std::tuple<_Args...>, _R> {};
using cache =
_cache<decltype(&_F::template operator()<cached_fixed_point<_F> &>)>;
_F __fn;
static cache __ca;
public:
/**
* @param __fn 1st argument callable with the rest of its arguments, and the
* return type specified.
*/
cached_fixed_point(_F &&__fn) noexcept : __fn(std::forward<_F>(__fn)) {}
/**
* @brief Apply *this to 1st argument.
* @param __args Rest of arguments.
*/
template <class... _Args>
decltype(auto) operator()(_Args &&... __args) noexcept {
typename cache::key_type __key(__args...);
if (auto __i = __ca.lower_bound(__key);
__i != __ca.end() && __i->first == __key)
return __i->second;
else
return __ca
.emplace_hint(__i, std::move(__key),
__fn(*this, std::forward<_Args>(__args)...))
->second;
}
};
template <class _F>
typename cached_fixed_point<_F>::cache cached_fixed_point<_F>::__ca;
} // namespace workspace
#line 5 "Library/lib/utils"
// #include "src/utils/grid.hpp"
// #include "src/utils/hash.hpp"
#line 2 "Library/src/utils/io/istream.hpp"
/**
* @file istream.hpp
* @brief Input Stream
*/
#include <cxxabi.h>
#line 13 "Library/src/utils/io/istream.hpp"
#line 2 "Library/src/utils/sfinae.hpp"
/**
* @file sfinae.hpp
* @brief SFINAE
*/
#line 10 "Library/src/utils/sfinae.hpp"
#include <type_traits>
#ifndef __INT128_DEFINED__
#ifdef __SIZEOF_INT128__
#define __INT128_DEFINED__ 1
#else
#define __INT128_DEFINED__ 0
#endif
#endif
namespace std {
#if __INT128_DEFINED__
template <> struct make_signed<__uint128_t> { using type = __int128_t; };
template <> struct make_signed<__int128_t> { using type = __int128_t; };
template <> struct make_unsigned<__uint128_t> { using type = __uint128_t; };
template <> struct make_unsigned<__int128_t> { using type = __uint128_t; };
#endif
} // namespace std
namespace workspace {
template <class Tp, class... Args> struct variadic_front { using type = Tp; };
template <class... Args> struct variadic_back;
template <class Tp> struct variadic_back<Tp> { using type = Tp; };
template <class Tp, class... Args> struct variadic_back<Tp, Args...> {
using type = typename variadic_back<Args...>::type;
};
template <class type, template <class> class trait>
using enable_if_trait_type = typename std::enable_if<trait<type>::value>::type;
template <class Container>
using element_type = typename std::decay<decltype(
*std::begin(std::declval<Container&>()))>::type;
template <class T, class = std::nullptr_t>
struct has_begin : std::false_type {};
template <class T>
struct has_begin<T, decltype(std::begin(std::declval<T>()), nullptr)>
: std::true_type {};
template <class T, class = int> struct mapped_of {
using type = element_type<T>;
};
template <class T>
struct mapped_of<T,
typename std::pair<int, typename T::mapped_type>::first_type> {
using type = typename T::mapped_type;
};
template <class T> using mapped_type = typename mapped_of<T>::type;
template <class T, class = void> struct is_integral_ext : std::false_type {};
template <class T>
struct is_integral_ext<
T, typename std::enable_if<std::is_integral<T>::value>::type>
: std::true_type {};
#if __INT128_DEFINED__
template <> struct is_integral_ext<__int128_t> : std::true_type {};
template <> struct is_integral_ext<__uint128_t> : std::true_type {};
#endif
#if __cplusplus >= 201402
template <class T>
constexpr static bool is_integral_ext_v = is_integral_ext<T>::value;
#endif
template <typename T, typename = void> struct multiplicable_uint {
using type = uint_least32_t;
};
template <typename T>
struct multiplicable_uint<
T, typename std::enable_if<(2 < sizeof(T)) &&
(!__INT128_DEFINED__ || sizeof(T) <= 4)>::type> {
using type = uint_least64_t;
};
#if __INT128_DEFINED__
template <typename T>
struct multiplicable_uint<T, typename std::enable_if<(4 < sizeof(T))>::type> {
using type = __uint128_t;
};
#endif
template <typename T> struct multiplicable_int {
using type =
typename std::make_signed<typename multiplicable_uint<T>::type>::type;
};
} // namespace workspace
#line 15 "Library/src/utils/io/istream.hpp"
namespace workspace {
namespace internal {
template <class Tp, typename = std::nullptr_t> struct istream_helper {
istream_helper(std::istream &is, Tp &x) {
if constexpr (has_begin<Tp>::value)
for (auto &&e : x)
istream_helper<typename std::decay<decltype(e)>::type>(is, e);
else
static_assert(has_begin<Tp>::value, "istream unsupported type.");
}
};
template <class Tp>
struct istream_helper<
Tp,
decltype(std::declval<std::decay<decltype(std::declval<std::istream &>() >>
std::declval<Tp &>())>>(),
nullptr)> {
istream_helper(std::istream &is, Tp &x) { is >> x; }
};
#ifdef __SIZEOF_INT128__
template <> struct istream_helper<__uint128_t, std::nullptr_t> {
istream_helper(std::istream &__is, __uint128_t &__x) {
std::string __s;
__is >> __s;
bool __neg = false;
if (__s.front() == '-') __neg = true, __s.erase(__s.begin());
__x = 0;
for (char __d : __s) {
__x *= 10;
__d -= '0';
if (__neg)
__x -= __d;
else
__x += __d;
}
}
};
template <> struct istream_helper<__int128_t, std::nullptr_t> {
istream_helper(std::istream &__is, __int128_t &__x) {
std::string __s;
__is >> __s;
bool __neg = false;
if (__s.front() == '-') __neg = true, __s.erase(__s.begin());
__x = 0;
for (char __d : __s) {
__x *= 10;
__d -= '0';
if (__neg)
__x -= __d;
else
__x += __d;
}
}
};
#endif // INT128
template <class T1, class T2> struct istream_helper<std::pair<T1, T2>> {
istream_helper(std::istream &is, std::pair<T1, T2> &x) {
istream_helper<T1>(is, x.first), istream_helper<T2>(is, x.second);
}
};
template <class... Tps> struct istream_helper<std::tuple<Tps...>> {
istream_helper(std::istream &is, std::tuple<Tps...> &x) { iterate(is, x); }
private:
template <class Tp, size_t N = 0> void iterate(std::istream &is, Tp &x) {
if constexpr (N == std::tuple_size<Tp>::value)
return;
else
istream_helper<typename std::tuple_element<N, Tp>::type>(is,
std::get<N>(x)),
iterate<Tp, N + 1>(is, x);
}
};
} // namespace internal
/**
* @brief A wrapper class for std::istream.
*/
class istream : public std::istream {
public:
/**
* @brief Wrapped operator.
*/
template <typename Tp> istream &operator>>(Tp &x) {
internal::istream_helper<Tp>(*this, x);
if (std::istream::fail()) {
static auto once = atexit([] {
std::cerr << "\n\033[43m\033[30mwarning: failed to read \'"
<< abi::__cxa_demangle(typeid(Tp).name(), 0, 0, 0)
<< "\'.\033[0m\n\n";
});
assert(!once);
}
return *this;
}
};
decltype(auto) cin = static_cast<istream &>(std::cin);
} // namespace workspace
#line 2 "Library/src/utils/io/ostream.hpp"
/**
* @file ostream.hpp
* @brief Output Stream
*/
#line 9 "Library/src/utils/io/ostream.hpp"
namespace workspace {
/**
* @brief Stream insertion operator for C-style array.
*
* @param __os Output stream
* @param __a Array
* @return Reference to __os.
*/
template <class _Os, class _Tp, size_t _Nm>
typename std::enable_if<bool(sizeof(_Tp) > 2), _Os &>::type operator<<(
_Os &__os, const _Tp (&__a)[_Nm]) {
if constexpr (_Nm) {
__os << *__a;
for (auto __i = __a + 1, __e = __a + _Nm; __i != __e; ++__i)
__os << ' ' << *__i;
}
return __os;
}
/**
* @brief Stream insertion operator for std::pair.
*
* @param __os Output stream
* @param __p Pair
* @return Reference to __os.
*/
template <class _Os, class _T1, class _T2>
_Os &operator<<(_Os &__os, const std::pair<_T1, _T2> &__p) {
return __os << __p.first << ' ' << __p.second;
}
/**
* @brief Stream insertion operator for std::tuple.
*
* @param __os Output stream
* @param __t Tuple
* @return Reference to __os.
*/
template <class _Os, class _Tp, size_t _Nm = 0>
typename std::enable_if<bool(std::tuple_size<_Tp>::value + 1), _Os &>::type
operator<<(_Os &__os, const _Tp &__t) {
if constexpr (_Nm != std::tuple_size<_Tp>::value) {
if constexpr (_Nm) __os << ' ';
__os << std::get<_Nm>(__t);
operator<<<_Os, _Tp, _Nm + 1>(__os, __t);
}
return __os;
}
template <class _Os, class _Container,
typename = decltype(std::begin(std::declval<_Container>()))>
typename std::enable_if<
!std::is_same<typename std::decay<_Container>::type, std::string>::value &&
!std::is_same<typename std::decay<_Container>::type, char *>::value,
_Os &>::type
operator<<(_Os &__os, const _Container &__cont) {
bool __h = true;
for (auto &&__e : __cont) __h ? __h = 0 : (__os << ' ', 0), __os << __e;
return __os;
}
#ifdef __SIZEOF_INT128__
/**
* @brief Stream insertion operator for __int128_t.
*
* @param __os Output Stream
* @param __x 128-bit integer
* @return Reference to __os.
*/
template <class _Os> _Os &operator<<(_Os &__os, __int128_t __x) {
if (!__x) return __os << '0';
if (__x < 0) __os << '-';
char __s[40], *__p = __s;
while (__x) {
auto __d = __x % 10;
*__p++ = '0' + (__x < 0 ? -__d : __d);
__x /= 10;
}
*__p = 0;
for (char *__t = __s; __t < --__p; ++__t) *__t ^= *__p ^= *__t ^= *__p;
return __os << __s;
}
/**
* @brief Stream insertion operator for __uint128_t.
*
* @param __os Output Stream
* @param __x 128-bit unsigned integer
* @return Reference to __os.
*/
template <class _Os> _Os &operator<<(_Os &__os, __uint128_t __x) {
if (!__x) return __os << '0';
char __s[40], *__p = __s;
while (__x) *__p++ = '0' + __x % 10, __x /= 10;
*__p = 0;
for (char *__t = __s; __t < --__p; ++__t) *__t ^= *__p ^= *__t ^= *__p;
return __os << __s;
}
#endif
} // namespace workspace
#line 9 "Library/lib/utils"
// #include "src/utils/io/read.hpp"
#line 2 "Library/src/utils/io/setup.hpp"
/*
* @file setup.hpp
* @brief I/O Setup
*/
#line 10 "Library/src/utils/io/setup.hpp"
namespace workspace {
/*
* @fn io_setup
* @brief Setup I/O.
* @param precision Standard output precision
*/
void io_setup(int precision) {
std::ios::sync_with_stdio(false);
std::cin.tie(nullptr);
std::cout << std::fixed << std::setprecision(precision);
#ifdef _buffer_check
atexit([] {
char bufc;
if (std::cin >> bufc)
std::cerr << "\n\033[43m\033[30mwarning: buffer not empty.\033[0m\n\n";
});
#endif
}
} // namespace workspace
#line 2 "Library/src/utils/iterator/category.hpp"
/*
* @file category.hpp
* @brief Iterator Category
*/
#line 10 "Library/src/utils/iterator/category.hpp"
namespace workspace {
/*
* @tparam Tuple Tuple of iterator types
*/
template <class Tuple, size_t N = std::tuple_size<Tuple>::value - 1>
struct common_iterator_category {
using type = typename std::common_type<
typename common_iterator_category<Tuple, N - 1>::type,
typename std::iterator_traits<typename std::tuple_element<
N, Tuple>::type>::iterator_category>::type;
};
template <class Tuple> struct common_iterator_category<Tuple, 0> {
using type = typename std::iterator_traits<
typename std::tuple_element<0, Tuple>::type>::iterator_category;
};
} // namespace workspace
#line 2 "Library/src/utils/iterator/reverse.hpp"
/*
* @file reverse_iterator.hpp
* @brief Reverse Iterator
*/
#if __cplusplus >= 201703L
#include <iterator>
#include <optional>
namespace workspace {
/*
* @class reverse_iterator
* @brief Wrapper class for `std::reverse_iterator`.
* @see http://gcc.gnu.org/PR51823
*/
template <class Iterator>
class reverse_iterator : public std::reverse_iterator<Iterator> {
using base_std = std::reverse_iterator<Iterator>;
std::optional<typename base_std::value_type> deref;
public:
using base_std::reverse_iterator;
constexpr typename base_std::reference operator*() noexcept {
if (!deref) {
Iterator tmp = base_std::current;
deref = *--tmp;
}
return deref.value();
}
constexpr reverse_iterator &operator++() noexcept {
base_std::operator++();
deref.reset();
return *this;
}
constexpr reverse_iterator &operator--() noexcept {
base_std::operator++();
deref.reset();
return *this;
}
constexpr reverse_iterator operator++(int) noexcept {
base_std::operator++();
deref.reset();
return *this;
}
constexpr reverse_iterator operator--(int) noexcept {
base_std::operator++();
deref.reset();
return *this;
}
};
} // namespace workspace
#endif
#line 2 "Library/src/utils/make_vector.hpp"
/*
* @file make_vector.hpp
* @brief Multi-dimensional Vector
*/
#if __cplusplus >= 201703L
#include <tuple>
#include <vector>
namespace workspace {
/*
* @brief Make a multi-dimensional vector.
* @tparam Tp type of the elements
* @tparam N dimension
* @tparam S integer type
* @param sizes The size of each dimension
* @param init The initial value
*/
template <typename Tp, size_t N, typename S>
constexpr auto make_vector([[maybe_unused]] S* sizes, Tp const& init = Tp()) {
static_assert(std::is_convertible_v<S, size_t>);
if constexpr (N)
return std::vector(*sizes,
make_vector<Tp, N - 1, S>(std::next(sizes), init));
else
return init;
}
/*
* @brief Make a multi-dimensional vector.
* @param sizes The size of each dimension
* @param init The initial value
*/
template <typename Tp, size_t N, typename S>
constexpr auto make_vector(const S (&sizes)[N], Tp const& init = Tp()) {
return make_vector<Tp, N, S>((S*)sizes, init);
}
/*
* @brief Make a multi-dimensional vector.
* @param sizes The size of each dimension
* @param init The initial value
*/
template <typename Tp, size_t N, typename S, size_t I = 0>
constexpr auto make_vector([[maybe_unused]] std::array<S, N> const& sizes,
Tp const& init = Tp()) {
static_assert(std::is_convertible_v<S, size_t>);
if constexpr (I == N)
return init;
else
return std::vector(sizes[I], make_vector<Tp, N, S, I + 1>(sizes, init));
}
/*
* @brief Make a multi-dimensional vector.
* @param sizes The size of each dimension
* @param init The initial value
*/
template <typename Tp, size_t N = SIZE_MAX, size_t I = 0, class... Args>
constexpr auto make_vector([[maybe_unused]] std::tuple<Args...> const& sizes,
Tp const& init = Tp()) {
using tuple_type = std::tuple<Args...>;
if constexpr (I == std::tuple_size_v<tuple_type> || I == N)
return init;
else {
static_assert(
std::is_convertible_v<std::tuple_element_t<I, tuple_type>, size_t>);
return std::vector(std::get<I>(sizes),
make_vector<Tp, N, I + 1>(sizes, init));
}
}
/*
* @brief Make a multi-dimensional vector.
* @param sizes The size of each dimension
* @param init The initial value
*/
template <typename Tp, class Fst, class Snd>
constexpr auto make_vector(std::pair<Fst, Snd> const& sizes,
Tp const& init = Tp()) {
static_assert(std::is_convertible_v<Fst, size_t>);
static_assert(std::is_convertible_v<Snd, size_t>);
return make_vector({(size_t)sizes.first, (size_t)sizes.second}, init);
}
} // namespace workspace
#endif
#line 2 "Library/src/utils/py-like/enumerate.hpp"
/*
* @file enumerate.hpp
* @brief Enumerate
*/
#line 2 "Library/src/utils/py-like/range.hpp"
/**
* @file range.hpp
* @brief Range
*/
#line 9 "Library/src/utils/py-like/range.hpp"
#line 2 "Library/src/utils/py-like/reversed.hpp"
/**
* @file reversed.hpp
* @brief Reversed
*/
#include <initializer_list>
#line 10 "Library/src/utils/py-like/reversed.hpp"
namespace workspace {
namespace internal {
template <class Container> class reversed {
Container cont;
public:
constexpr reversed(Container &&cont) : cont(cont) {}
constexpr auto begin() { return std::rbegin(cont); }
constexpr auto end() { return std::rend(cont); }
};
} // namespace internal
template <class Container> constexpr auto reversed(Container &&cont) noexcept {
return internal::reversed<Container>{std::forward<Container>(cont)};
}
template <class Tp>
constexpr auto reversed(std::initializer_list<Tp> &&cont) noexcept {
return internal::reversed<std::initializer_list<Tp>>{
std::forward<std::initializer_list<Tp>>(cont)};
}
} // namespace workspace
#line 12 "Library/src/utils/py-like/range.hpp"
#if __cplusplus >= 201703L
namespace workspace {
template <class Index> class range {
Index first, last;
public:
class iterator {
Index current;
public:
using difference_type = std::ptrdiff_t;
using value_type = Index;
using reference = typename std::add_const<Index>::type &;
using pointer = iterator;
using iterator_category = std::bidirectional_iterator_tag;
constexpr iterator(Index const &__i = Index()) noexcept : current(__i) {}
constexpr bool operator==(iterator const &rhs) const noexcept {
return current == rhs.current;
}
constexpr bool operator!=(iterator const &rhs) const noexcept {
return current != rhs.current;
}
constexpr iterator &operator++() noexcept {
++current;
return *this;
}
constexpr iterator &operator--() noexcept {
--current;
return *this;
}
constexpr reference operator*() const noexcept { return current; }
};
constexpr range(Index first, Index last) noexcept
: first(first), last(last) {}
constexpr range(Index last) noexcept : first(), last(last) {}
constexpr iterator begin() const noexcept { return iterator{first}; }
constexpr iterator end() const noexcept { return iterator{last}; }
constexpr reverse_iterator<iterator> rbegin() const noexcept {
return reverse_iterator<iterator>(end());
}
constexpr reverse_iterator<iterator> rend() const noexcept {
return reverse_iterator<iterator>(begin());
}
};
template <class... Args> constexpr auto rrange(Args &&... args) noexcept {
return internal::reversed(range(std::forward<Args>(args)...));
}
} // namespace workspace
#endif
#line 2 "Library/src/utils/py-like/zip.hpp"
/**
* @file zip.hpp
* @brief Zip
*/
#line 11 "Library/src/utils/py-like/zip.hpp"
#line 14 "Library/src/utils/py-like/zip.hpp"
#if __cplusplus >= 201703L
namespace workspace {
namespace internal {
template <class> struct zipped_iterator;
template <class...> struct zipped_iterator_tuple;
template <class... Args> class zipped {
using ref_tuple = std::tuple<Args...>;
ref_tuple args;
template <size_t N = 0> constexpr auto begin_cat() const noexcept {
if constexpr (N != std::tuple_size<ref_tuple>::value) {
return std::tuple_cat(std::tuple(std::begin(std::get<N>(args))),
begin_cat<N + 1>());
} else
return std::tuple<>();
}
template <size_t N = 0> constexpr auto end_cat() const noexcept {
if constexpr (N != std::tuple_size<ref_tuple>::value) {
return std::tuple_cat(std::tuple(std::end(std::get<N>(args))),
end_cat<N + 1>());
} else
return std::tuple<>();
}
public:
constexpr zipped(Args &&... args) noexcept : args(args...) {}
class iterator {
using base_tuple = typename zipped_iterator_tuple<Args...>::type;
public:
using iterator_category =
typename common_iterator_category<base_tuple>::type;
using difference_type = std::ptrdiff_t;
using value_type = zipped_iterator<base_tuple>;
using reference = zipped_iterator<base_tuple> &;
using pointer = iterator;
protected:
value_type current;
template <size_t N = 0>
constexpr bool equal(const iterator &rhs) const noexcept {
if constexpr (N != std::tuple_size<base_tuple>::value) {
return std::get<N>(current) == std::get<N>(rhs.current) ||
equal<N + 1>(rhs);
} else
return false;
}
template <size_t N = 0> constexpr void increment() noexcept {
if constexpr (N != std::tuple_size<base_tuple>::value) {
++std::get<N>(current);
increment<N + 1>();
}
}
template <size_t N = 0> constexpr void decrement() noexcept {
if constexpr (N != std::tuple_size<base_tuple>::value) {
--std::get<N>(current);
decrement<N + 1>();
}
}
template <size_t N = 0>
constexpr void advance(difference_type __d) noexcept {
if constexpr (N != std::tuple_size<base_tuple>::value) {
std::get<N>(current) += __d;
advance<N + 1>(__d);
}
}
public:
constexpr iterator() noexcept = default;
constexpr iterator(base_tuple const ¤t) noexcept : current(current) {}
constexpr bool operator==(const iterator &rhs) const noexcept {
return equal(rhs);
}
constexpr bool operator!=(const iterator &rhs) const noexcept {
return !equal(rhs);
}
constexpr iterator &operator++() noexcept {
increment();
return *this;
}
constexpr iterator &operator--() noexcept {
decrement();
return *this;
}
constexpr bool operator<(const iterator &rhs) const noexcept {
return std::get<0>(current) < std::get<0>(rhs.current);
}
constexpr bool operator<=(const iterator &rhs) const noexcept {
return std::get<0>(current) <= std::get<0>(rhs.current);
}
constexpr iterator &operator+=(difference_type __d) noexcept {
advance(__d);
return *this;
}
constexpr iterator &operator-=(difference_type __d) noexcept {
advance(-__d);
return *this;
}
constexpr iterator operator+(difference_type __d) const noexcept {
return iterator{*this} += __d;
}
constexpr iterator operator-(difference_type __d) const noexcept {
return iterator{*this} -= __d;
}
constexpr difference_type operator-(const iterator &rhs) const noexcept {
return std::get<0>(current) - std::get<0>(rhs.current);
}
constexpr reference operator*() noexcept { return current; }
};
constexpr iterator begin() const noexcept { return iterator{begin_cat()}; }
constexpr iterator end() const noexcept { return iterator{end_cat()}; }
constexpr reverse_iterator<iterator> rbegin() const noexcept {
return reverse_iterator<iterator>{end()};
}
constexpr reverse_iterator<iterator> rend() const noexcept {
return reverse_iterator<iterator>{begin()};
}
};
template <class Tp, class... Args> struct zipped_iterator_tuple<Tp, Args...> {
using type = decltype(std::tuple_cat(
std::declval<std::tuple<decltype(std::begin(std::declval<Tp>()))>>(),
std::declval<typename zipped_iterator_tuple<Args...>::type>()));
};
template <> struct zipped_iterator_tuple<> { using type = std::tuple<>; };
template <class Iter_tuple> struct zipped_iterator : Iter_tuple {
constexpr zipped_iterator(Iter_tuple const &__t) noexcept
: Iter_tuple::tuple(__t) {}
constexpr zipped_iterator(zipped_iterator const &__t) = default;
constexpr zipped_iterator &operator=(zipped_iterator const &__t) = default;
// Avoid move initialization.
constexpr zipped_iterator(zipped_iterator &&__t)
: zipped_iterator(static_cast<zipped_iterator const &>(__t)) {}
// Avoid move assignment.
zipped_iterator &operator=(zipped_iterator &&__t) {
return operator=(static_cast<zipped_iterator const &>(__t));
}
template <size_t N>
friend constexpr auto &get(zipped_iterator<Iter_tuple> const &__z) noexcept {
return *std::get<N>(__z);
}
template <size_t N>
friend constexpr auto get(zipped_iterator<Iter_tuple> &&__z) noexcept {
return *std::get<N>(__z);
}
};
} // namespace internal
} // namespace workspace
namespace std {
template <size_t N, class Iter_tuple>
struct tuple_element<N, workspace::internal::zipped_iterator<Iter_tuple>> {
using type = typename remove_reference<typename iterator_traits<
typename tuple_element<N, Iter_tuple>::type>::reference>::type;
};
template <class Iter_tuple>
struct tuple_size<workspace::internal::zipped_iterator<Iter_tuple>>
: tuple_size<Iter_tuple> {};
} // namespace std
namespace workspace {
template <class... Args> constexpr auto zip(Args &&... args) noexcept {
return internal::zipped<Args...>(std::forward<Args>(args)...);
}
template <class... Args>
constexpr auto zip(std::initializer_list<Args> const &... args) noexcept {
return internal::zipped<const std::initializer_list<Args>...>(args...);
}
} // namespace workspace
#endif
#line 10 "Library/src/utils/py-like/enumerate.hpp"
#if __cplusplus >= 201703L
namespace workspace {
constexpr size_t min_size() noexcept { return SIZE_MAX; }
template <class Container, class... Args>
constexpr size_t min_size(Container const &cont, Args &&... args) noexcept {
return std::min(std::size(cont), min_size(std::forward<Args>(args)...));
}
template <class... Args> constexpr auto enumerate(Args &&... args) noexcept {
return zip(range(min_size(args...)), std::forward<Args>(args)...);
}
template <class... Args>
constexpr auto enumerate(std::initializer_list<Args> const &... args) noexcept {
return zip(range(min_size(args...)), std::vector(args)...);
}
} // namespace workspace
#endif
#line 16 "Library/lib/utils"
// #include "src/utils/py-like/reversed.hpp"
// #include "src/utils/py-like/zip.hpp"
// #include "src/utils/rand/rng.hpp"
// #include "src/utils/rand/shuffle.hpp"
#line 2 "Library/src/utils/round_div.hpp"
/*
* @file round_div.hpp
* @brief Round Integer Division
*/
#line 9 "Library/src/utils/round_div.hpp"
#line 11 "Library/src/utils/round_div.hpp"
namespace workspace {
/*
* @fn floor_div
* @brief floor of fraction.
* @param x the numerator
* @param y the denominator
* @return maximum integer z s.t. z <= x / y
* @note y must be nonzero.
*/
template <typename T1, typename T2>
constexpr typename std::enable_if<(is_integral_ext<T1>::value &&
is_integral_ext<T2>::value),
typename std::common_type<T1, T2>::type>::type
floor_div(T1 x, T2 y) {
assert(y != 0);
if (y < 0) x = -x, y = -y;
return x < 0 ? (x - y + 1) / y : x / y;
}
/*
* @fn ceil_div
* @brief ceil of fraction.
* @param x the numerator
* @param y the denominator
* @return minimum integer z s.t. z >= x / y
* @note y must be nonzero.
*/
template <typename T1, typename T2>
constexpr typename std::enable_if<(is_integral_ext<T1>::value &&
is_integral_ext<T2>::value),
typename std::common_type<T1, T2>::type>::type
ceil_div(T1 x, T2 y) {
assert(y != 0);
if (y < 0) x = -x, y = -y;
return x < 0 ? x / y : (x + y - 1) / y;
}
} // namespace workspace
#line 21 "Library/lib/utils"
// #include "src/utils/sfinae.hpp"
#line 11 "other/y.cc"
signed main() {
using namespace workspace;
io_setup(15);
/* given
case_info.read(); //*/
/* unspecified
case_info.total = -1; //*/
return case_info.iterate();
}
#line 2 "Library/src/combinatorics/binomial.hpp"
/**
* @file binomial.hpp
* @brief Binomial Coefficient
* @date 2021-01-15
*
*
*/
#line 2 "Library/src/modular/modint.hpp"
/**
* @file modint.hpp
*
* @brief Modular Arithmetic
*/
#line 12 "Library/src/modular/modint.hpp"
#line 14 "Library/src/modular/modint.hpp"
namespace workspace {
namespace internal {
/**
* @brief Base of modular arithmetic.
*
* @tparam Mod identifier, which represents modulus if positive
* @tparam Storage Reserved size for inverse calculation
*/
template <auto Mod, unsigned Storage> struct modint_base {
static_assert(is_integral_ext<decltype(Mod)>::value,
"Mod must be integral type.");
using mod_type = typename std::make_signed<typename std::conditional<
0 < Mod, typename std::add_const<decltype(Mod)>::type,
decltype(Mod)>::type>::type;
using value_type = typename std::decay<mod_type>::type;
using mul_type = typename multiplicable_uint<value_type>::type;
static mod_type mod;
static value_type storage;
constexpr static void reserve(unsigned __n) noexcept { storage = __n; }
protected:
value_type value = 0;
public:
constexpr modint_base() noexcept = default;
template <class int_type,
typename std::enable_if<is_integral_ext<int_type>::value>::type * =
nullptr>
constexpr modint_base(int_type n) noexcept
: value((n %= mod) < 0 ? n += mod : n) {}
constexpr modint_base(bool n) noexcept : value(n) {}
constexpr operator value_type() const noexcept { return value; }
constexpr static modint_base one() noexcept { return 1; }
// unary operators {{
constexpr modint_base operator++(int) noexcept {
modint_base __t{*this};
operator++();
return __t;
}
constexpr modint_base operator--(int) noexcept {
modint_base __t{*this};
operator--();
return __t;
}
constexpr modint_base &operator++() noexcept {
if (++value == mod) value = 0;
return *this;
}
constexpr modint_base &operator--() noexcept {
if (!value) value = mod;
--value;
return *this;
}
constexpr modint_base operator-() const noexcept {
modint_base __t;
__t.value = value ? mod - value : 0;
return __t;
}
// }} unary operators
// operator+= {{
constexpr modint_base &operator+=(modint_base const &rhs) noexcept {
if ((value += rhs.value) >= mod) value -= mod;
return *this;
}
template <class int_type>
constexpr typename std::enable_if<is_integral_ext<int_type>::value,
modint_base>::type &
operator+=(int_type const &rhs) noexcept {
if (((value += rhs) %= mod) < 0) value += mod;
return *this;
}
// }} operator+=
// operator+ {{
template <class int_type>
constexpr typename std::enable_if<is_integral_ext<int_type>::value,
modint_base>::type
operator+(int_type const &rhs) const noexcept {
return modint_base{*this} += rhs;
}
constexpr modint_base operator+(modint_base rhs) const noexcept {
return rhs += *this;
}
template <class int_type>
constexpr friend typename std::enable_if<is_integral_ext<int_type>::value,
modint_base>::type
operator+(int_type const &lhs, modint_base rhs) noexcept {
return rhs += lhs;
}
// }} operator+
// operator-= {{
constexpr modint_base &operator-=(modint_base const &rhs) noexcept {
if ((value -= rhs.value) < 0) value += mod;
return *this;
}
template <class int_type>
constexpr typename std::enable_if<is_integral_ext<int_type>::value,
modint_base>::type &
operator-=(int_type rhs) noexcept {
if (((value -= rhs) %= mod) < 0) value += mod;
return *this;
}
// }} operator-=
// operator- {{
template <class int_type>
constexpr typename std::enable_if<is_integral_ext<int_type>::value,
modint_base>::type
operator-(int_type const &rhs) const noexcept {
return modint_base{*this} -= rhs;
}
constexpr modint_base operator-(modint_base const &rhs) const noexcept {
modint_base __t;
if (((__t.value = value) -= rhs.value) < 0) __t.value += mod;
return __t;
}
template <class int_type>
constexpr friend typename std::enable_if<is_integral_ext<int_type>::value,
modint_base>::type
operator-(int_type lhs, modint_base const &rhs) noexcept {
if (((lhs -= rhs.value) %= mod) < 0) lhs += mod;
modint_base __t;
__t.value = lhs;
return __t;
}
// }} operator-
// operator*= {{
constexpr modint_base &operator*=(modint_base const &rhs) noexcept {
if (!rhs.value)
value = 0;
else if (value) {
mul_type __r(value);
value = static_cast<value_type &&>((__r *= rhs.value) %= mod);
}
return *this;
}
template <class int_type>
constexpr typename std::enable_if<is_integral_ext<int_type>::value,
modint_base>::type &
operator*=(int_type rhs) noexcept {
if (!rhs)
value = 0;
else if (value) {
if ((rhs %= mod) < 0) rhs += mod;
mul_type __r(value);
value = static_cast<value_type &&>((__r *= rhs) %= mod);
}
return *this;
}
// }} operator*=
// operator* {{
constexpr modint_base operator*(modint_base const &rhs) const noexcept {
if (!value or !rhs.value) return {};
mul_type __r(value);
modint_base __t;
__t.value = static_cast<value_type &&>((__r *= rhs.value) %= mod);
return __t;
}
template <class int_type>
constexpr typename std::enable_if<is_integral_ext<int_type>::value,
modint_base>::type
operator*(int_type rhs) const noexcept {
if (!value or !rhs) return {};
if ((rhs %= mod) < 0) rhs += mod;
mul_type __r(value);
modint_base __t;
__t.value = static_cast<value_type &&>((__r *= rhs) %= mod);
return __t;
}
template <class int_type>
constexpr friend typename std::enable_if<is_integral_ext<int_type>::value,
modint_base>::type
operator*(int_type lhs, modint_base const &rhs) noexcept {
if (!lhs or !rhs.value) return {};
if ((lhs %= mod) < 0) lhs += mod;
mul_type __r(lhs);
modint_base __t;
__t.value = static_cast<value_type &&>((__r *= rhs.value) %= mod);
return __t;
}
// }} operator*
protected:
static value_type _mem(value_type __x) {
static std::vector<value_type> __m{0, 1};
static value_type __i = (__m.reserve(Storage), 1);
while (__i < __x) {
++__i;
__m.emplace_back(mod - mul_type(mod / __i) * __m[mod % __i] % mod);
}
return __m[__x];
}
template <class int_type>
constexpr static typename std::enable_if<is_integral_ext<int_type>::value,
value_type>::type
_div(mul_type __r, int_type __x) noexcept {
assert(__x);
if (!__r) return 0;
int_type __v{};
bool __neg = __x < 0 ? __x = -__x, true : false;
if (__x < storage)
__v = _mem(__x);
else {
int_type __y{mod}, __u{1}, __t;
while (__x)
__t = __y / __x, __y ^= __x ^= (__y -= __t * __x) ^= __x,
__v ^= __u ^= (__v -= __t * __u) ^= __u;
if (__y < 0) __neg ^= 1;
}
if (__neg)
__v = 0 < __v ? mod - __v : -__v;
else if (__v < 0)
__v += mod;
if (__r == 1) return static_cast<value_type>(__v);
return static_cast<value_type>((__r *= __v) %= mod);
}
public:
// operator/= {{
constexpr modint_base &operator/=(modint_base const &rhs) noexcept {
if (value) value = _div(value, rhs.value);
return *this;
}
template <class int_type>
constexpr typename std::enable_if<is_integral_ext<int_type>::value,
modint_base>::type &
operator/=(int_type rhs) noexcept {
if (value) value = _div(value, rhs %= mod);
return *this;
}
// }} operator/=
// operator/ {{
constexpr modint_base operator/(modint_base const &rhs) const noexcept {
if (!value) return {};
modint_base __t;
__t.value = _div(value, rhs.value);
return __t;
}
template <class int_type>
constexpr typename std::enable_if<is_integral_ext<int_type>::value,
modint_base>::type
operator/(int_type rhs) const noexcept {
if (!value) return {};
modint_base __t;
__t.value = _div(value, rhs %= mod);
return __t;
}
template <class int_type>
constexpr friend typename std::enable_if<is_integral_ext<int_type>::value,
modint_base>::type
operator/(int_type lhs, modint_base const &rhs) noexcept {
if (!lhs) return {};
if ((lhs %= mod) < 0) lhs += mod;
modint_base __t;
__t.value = _div(lhs, rhs.value);
return __t;
}
// }} operator/
constexpr modint_base inv() const noexcept { return _div(1, value); }
template <class int_type>
friend constexpr typename std::enable_if<is_integral_ext<int_type>::value,
modint_base>::type
pow(modint_base b, int_type e) noexcept {
if (e < 0) {
e = -e;
b.value = _div(1, b.value);
}
modint_base __r;
for (__r.value = 1; e; e >>= 1, b *= b)
if (e & 1) __r *= b;
return __r;
}
template <class int_type>
constexpr typename std::enable_if<is_integral_ext<int_type>::value,
modint_base>::type
pow(int_type e) const noexcept {
modint_base __r, b;
__r.value = 1;
for (b.value = e < 0 ? e = -e, _div(1, value) : value; e; e >>= 1, b *= b)
if (e & 1) __r *= b;
return __r;
}
friend std::ostream &operator<<(std::ostream &os,
const modint_base &rhs) noexcept {
return os << rhs.value;
}
friend std::istream &operator>>(std::istream &is, modint_base &rhs) noexcept {
intmax_t value;
rhs = (is >> value, value);
return is;
}
};
template <auto Mod, unsigned Storage>
typename modint_base<Mod, Storage>::mod_type modint_base<Mod, Storage>::mod =
Mod > 0 ? Mod : 0;
template <auto Mod, unsigned Storage>
typename modint_base<Mod, Storage>::value_type
modint_base<Mod, Storage>::storage = Storage;
} // namespace internal
/**
* @brief Modular arithmetic.
*
* @tparam Mod modulus
* @tparam Storage Reserved size for inverse calculation
*/
template <auto Mod, unsigned Storage = 0,
typename std::enable_if<(Mod > 0)>::type * = nullptr>
using modint = internal::modint_base<Mod, Storage>;
/**
* @brief Runtime modular arithmetic.
*
* @tparam type_id uniquely assigned
* @tparam Storage Reserved size for inverse calculation
*/
template <unsigned type_id = 0, unsigned Storage = 0>
using modint_runtime = internal::modint_base<-(signed)type_id, Storage>;
// #define modint_newtype modint_runtime<__COUNTER__>
} // namespace workspace
#line 2 "Library/src/combinatorics/factorial.hpp"
/**
* @file factorial.hpp
* @brief Factorial
* @date 2021-01-15
*
*
*/
#line 14 "Library/src/combinatorics/factorial.hpp"
namespace workspace {
template <class Tp> Tp factorial(int_fast32_t __x) noexcept {
if (__x < 0) return 0;
static std::vector<Tp> __t{1};
static int_fast32_t __i = (__t.reserve(0x1000000), 0);
while (__i < __x) {
++__i;
__t.emplace_back(__t.back() * __i);
}
return __t[__x];
}
template <class Tp> Tp factorial_inverse(int_fast32_t __x) noexcept {
if (__x < 0) return 0;
static std::vector<Tp> __t{1};
static int_fast32_t __i = (__t.reserve(0x1000000), 0);
while (__i < __x) {
++__i;
__t.emplace_back(__t.back() / __i);
}
return __t[__x];
}
} // namespace workspace
#line 13 "Library/src/combinatorics/binomial.hpp"
namespace workspace {
/**
* @brief Binomial coefficient for integer args.
*/
template <class Tp> Tp binomial(int_fast32_t __x, int_fast32_t __y) {
if (!__y) return 1;
if (__y < 0 || __x < __y) return 0;
return factorial<Tp>(__x) * factorial_inverse<Tp>(__y) *
factorial_inverse<Tp>(__x - __y);
}
} // namespace workspace
#line 2 "Library/src/algebra/polynomial.hpp"
/**
* @file polynomial.hpp
* @brief Polynomial
* @date 2021-02-19
*
*
*/
#line 12 "Library/src/algebra/polynomial.hpp"
#line 2 "Library/src/algebra/convolution/ntt.hpp"
#line 2 "Library/src/number_theory/ext_gcd.hpp"
/*
* @file ext_gcd
* @brief Extended Euclidean Algorithm
*/
#line 9 "Library/src/number_theory/ext_gcd.hpp"
#line 11 "Library/src/number_theory/ext_gcd.hpp"
namespace workspace {
/**
* @param a Integer
* @param b Integer
* @return Pair of integers (x, y) s.t. ax + by = g = gcd(a, b), |x| < |b/g|,
* |y| < |a/g|.
* @note return (0, 0) if (a, b) = (0, 0)
*/
template <typename T1, typename T2> constexpr auto ext_gcd(T1 a, T2 b) {
static_assert(is_integral_ext<T1>::value);
static_assert(is_integral_ext<T2>::value);
using result_type =
typename std::make_signed<typename std::common_type<T1, T2>::type>::type;
result_type p{1}, q{}, r{}, s{1}, t{};
while (b) {
r ^= p ^= r ^= p -= (t = a / b) * r;
s ^= q ^= s ^= q -= t * s;
b ^= a ^= b ^= a %= b;
}
if (a < 0) p = -p, q = -q;
return std::make_pair(p, q);
}
} // namespace workspace
#line 2 "Library/src/number_theory/primitive_root.hpp"
/**
* @file primitive_root.hpp
* @brief Primitive Root
* @date 2020-12-28
*/
#line 10 "Library/src/number_theory/primitive_root.hpp"
namespace workspace {
/**
* @brief Compile time primitive root.
*
* @tparam __mod A positive integer
* @return Minimum positive one if it exists. Otherwise 0.
*/
template <class Tp>
constexpr typename std::enable_if<(is_integral_ext<Tp>::value), Tp>::type
primitive_root(const Tp __mod) noexcept {
assert(__mod > 0);
using int_type = typename multiplicable_uint<Tp>::type;
int_type __r = __mod, __p[16] = {}, *__q = __p;
for (int_type __i = 2; __i <= __r / __i; ++__i) {
if (__r % __i) continue;
*__q++ = __i;
while (!(__r % __i)) __r /= __i;
}
if (__r != 1) *__q++ = __r;
int_type __tot = __mod;
for (__q = __p; *__q; *__q++ = 0) (__tot /= *__q) *= *__q - 1;
__r = __tot, __q = __p + 1, __p[0] = 1;
for (int_type __i = 2; __i <= __r / __i; ++__i) {
if (__r % __i) continue;
*__q++ = __i;
while (!(__r % __i)) __r /= __i;
}
if (__r != 1) *__q++ = __r;
for (Tp __r = 1; __r != __mod; ++__r) {
auto __cnt = 0;
for (__q = __p; *__q; ++__q) {
int_type __w = 1;
for (int_type __e = __tot / *__q, __x = __r; __e;
__e >>= 1, (__x *= __x) %= __mod)
if (__e & 1) (__w *= __x) %= __mod;
if (__w == 1 && ++__cnt > 1) break;
}
if (__cnt == 1) return __r;
}
return 0;
};
} // namespace workspace
#line 6 "Library/src/algebra/convolution/ntt.hpp"
namespace workspace {
namespace ntt_impl {
template <class _Tp> struct __coef {
_Tp sum_e[30]; // sum_e[i] = ies[0] * ... * ies[i - 1] * es[i]
constexpr __coef() : sum_e{} {
_Tp es[30] = {}, ies[30] = {}; // es[i]^(2^(2+i)) == 1
int cnt2 = __builtin_ctz(_Tp::mod - 1);
_Tp e = 1;
{
auto p = (_Tp::mod - 1) >> cnt2;
_Tp w = primitive_root(_Tp::mod);
while (p) {
if (p & 1) e *= w;
p >>= 1;
w *= w;
}
}
_Tp ie = ext_gcd(decltype(_Tp::mod)(e), _Tp::mod).first;
for (int i = cnt2; i >= 2; i--) {
// e^(2^i) == 1
es[i - 2] = e;
ies[i - 2] = ie;
e *= e;
ie *= ie;
}
_Tp now = 1;
for (int i = 0; i <= cnt2 - 2; i++) {
sum_e[i] = es[i] * now;
now *= ies[i];
}
}
};
template <class _Tp> struct __icoef {
_Tp sum_ie[30]; // sum_e[i] = ies[0] * ... * ies[i - 1] * es[i]
constexpr __icoef() : sum_ie{} {
_Tp es[30] = {}, ies[30] = {}; // es[i]^(2^(2+i)) == 1
int cnt2 = __builtin_ctz(_Tp::mod - 1);
_Tp e = 1;
{
auto p = (_Tp::mod - 1) >> cnt2;
_Tp w = primitive_root(_Tp::mod);
while (p) {
if (p & 1) e *= w;
p >>= 1;
w *= w;
}
}
_Tp ie = ext_gcd(decltype(_Tp::mod)(e), _Tp::mod).first;
for (int i = cnt2; i >= 2; i--) {
// e^(2^i) == 1
es[i - 2] = e;
ies[i - 2] = ie;
e *= e;
ie *= ie;
}
_Tp now = 1;
for (int i = 0; i <= cnt2 - 2; i++) {
sum_ie[i] = ies[i] * now;
now *= es[i];
}
}
};
template <class _Tp> struct __ipow2 {
_Tp __ip2[30];
constexpr __ipow2() : __ip2{1, (1 + _Tp::mod) / 2} {
for (size_t __i = 1; __i + 1 != std::size(__ip2); ++__i)
__ip2[__i + 1] = __ip2[__i] * __ip2[1];
}
};
template <class _RAIter> constexpr void ntt(_RAIter __first, _RAIter __last) {
using modint = typename std::decay<decltype(*__first)>::type;
constexpr __coef<modint> _;
int h = __builtin_ctz(__last - __first);
for (int ph = 1; ph <= h; ph++) {
int w = 1 << (ph - 1), p = 1 << (h - ph);
modint now = -1;
for (int s = 0; s < w; s++) {
auto __l = __first + (s << (h - ph + 1));
auto __r = __first + p + (s << (h - ph + 1));
for (int i = 0; i < p; ++i, ++__l, ++__r) {
auto __tmp = *__l;
*__r *= now;
*__l -= *__r;
*__r += __tmp;
}
now *= _.sum_e[__builtin_ctz(~(unsigned int)(s))];
}
}
}
template <class _RAIter> constexpr void intt(_RAIter __first, _RAIter __last) {
using modint = typename std::decay<decltype(*__first)>::type;
constexpr __icoef<modint> _;
int h = __builtin_ctz(__last - __first);
for (int ph = h; ph >= 1; ph--) {
int w = 1 << (ph - 1), p = 1 << (h - ph);
modint inow = 1;
for (int s = 0; s < w; s++) {
auto __l = __first + (s << (h - ph + 1));
auto __r = __first + p + (s << (h - ph + 1));
for (int i = 0; i < p; ++i, ++__l, ++__r) {
auto __tmp = (*__l - *__r) * inow;
*__l += *__r;
*__r = __tmp;
}
inow *= _.sum_ie[__builtin_ctz(~(unsigned int)(s))];
}
}
constexpr __ipow2<modint> __;
while (__first != __last) *--__last *= __.__ip2[h];
}
template <class _A> constexpr void ntt(_A &a) {
using modint = typename std::decay<decltype(a[0])>::type;
constexpr __coef<modint> _;
int h = __builtin_ctz(a.size());
for (int ph = 1; ph <= h; ph++) {
int w = 1 << (ph - 1), p = 1 << (h - ph);
modint now = 1;
for (int s = 0; s < w; s++) {
int offset = s << (h - ph + 1);
for (int i = 0; i < p; i++) {
auto l = a[i + offset];
auto r = a[i + offset + p] * now;
a[i + offset] = l + r;
a[i + offset + p] = l - r;
}
now *= _.sum_e[__builtin_ctz(~(unsigned int)(s))];
}
}
}
template <class _A> constexpr void intt(_A &a) {
using modint = typename std::decay<decltype(a[0])>::type;
constexpr __icoef<modint> _;
int h = __builtin_ctz(a.size());
for (int ph = h; ph >= 1; ph--) {
int w = 1 << (ph - 1), p = 1 << (h - ph);
modint inow = 1;
for (int s = 0; s < w; s++) {
int offset = s << (h - ph + 1);
for (int i = 0; i < p; i++) {
auto l = a[i + offset];
auto r = a[i + offset + p];
a[i + offset] = l + r;
a[i + offset + p] = (l - r) * inow;
}
inow *= _.sum_ie[__builtin_ctz(~(unsigned int)(s))];
}
}
constexpr __ipow2<modint> __;
for (auto &x : a) x *= __.__ip2[h];
}
} // namespace ntt_impl
using ntt_impl::intt;
using ntt_impl::ntt;
} // namespace workspace
#line 14 "Library/src/algebra/polynomial.hpp"
namespace workspace {
template <class _Tp, std::size_t _Conv_threshold = 60>
class polynomial : public std::vector<_Tp> {
protected:
using vector = std::vector<_Tp>;
using poly = polynomial;
void conv_naive(const poly& __x) {
if (__x._M_impl._M_start == __x._M_impl._M_finish)
vector::_M_erase_at_end(vector::_M_impl._M_start);
else {
vector::_M_default_append(__x._M_impl._M_finish - __x._M_impl._M_start -
1);
for (auto __i = vector::_M_impl._M_finish;
__i-- != vector::_M_impl._M_start;) {
auto __j = __i, __k = __x._M_impl._M_start;
*__i *= *__k++;
while (__j != vector::_M_impl._M_start && __k != __x._M_impl._M_finish)
*__i += *--__j * *__k++;
}
}
}
void conv_ntt(poly&& __x) {
size_type __n = vector::size(), __m = __x.size();
size_type __len = 1 << (32 - __builtin_clz(__n + __m - 1));
vector::_M_default_append(__len - __n);
__x._M_default_append(__len - __m);
ntt(vector::_M_impl._M_start, vector::_M_impl._M_finish);
ntt(__x._M_impl._M_start, __x._M_impl._M_finish);
for (auto __i = vector::_M_impl._M_start, __j = __x._M_impl._M_start;
__i != vector::_M_impl._M_finish; ++__i, ++__j)
*__i *= *__j;
intt(vector::_M_impl._M_start, vector::_M_impl._M_finish);
vector::_M_erase_at_end(vector::_M_impl._M_start + __n + __m - 1);
}
public:
using vector::vector;
using size_type = typename vector::size_type;
typename vector::reference operator[](size_type __i) {
if (size_type __n = vector::_M_impl._M_finish - vector::_M_impl._M_start;
__n <= __i) {
vector::_M_default_append(__i + 1 - __n);
}
return *(vector::_M_impl._M_start + __i);
}
typename vector::const_reference operator[](size_type __i) const {
return __i < size_type(vector::_M_impl._M_finish - vector::_M_impl._M_start)
? *(vector::_M_impl._M_start + __i)
: 0;
}
poly operator+() const { return *this; }
poly operator-() const {
poly __x = *this;
for (auto __i = __x._M_impl._M_start; __i != __x._M_impl._M_finish; ++__i)
*__i = -*__i;
return __x;
}
poly& operator+=(const poly& __x) {
if (vector::size() < __x.size())
vector::_M_default_append(__x.size() - vector::size());
for (auto __i = vector::_M_impl._M_start, __j = __x._M_impl._M_start;
__j != __x._M_impl._M_finish; ++__i, ++__j)
*__i += *__j;
return *this;
}
poly& operator+=(const _Tp& __x) {
if (__x != static_cast<_Tp>(0)) {
if (vector::_M_impl._M_start == vector::_M_impl._M_finish)
vector::emplace_back(__x);
else
*vector::_M_impl._M_start = __x;
}
return *this;
}
poly& operator-=(const poly& __x) {
if (vector::size() < __x.size())
vector::_M_default_append(__x.size() - vector::size());
for (auto __i = vector::_M_impl._M_start, __j = __x._M_impl._M_start;
__j != __x._M_impl._M_finish; ++__i, ++__j)
*__i -= *__j;
return *this;
}
poly& operator-=(const _Tp& __x) {
if (__x != static_cast<_Tp>(0)) {
if (vector::_M_impl._M_start == vector::_M_impl._M_finish)
vector::emplace_back(-__x);
else
*vector::_M_impl._M_start -= __x;
}
return *this;
}
typename std::enable_if<bool(_Tp::mod > 2), poly&>::type operator*=(
const poly& __x) {
std::min(vector::size(), __x.size()) > _Conv_threshold
? conv_ntt(poly(__x))
: conv_naive(this == &__x ? poly(*this) : __x);
return *this;
}
typename std::enable_if<bool(_Tp::mod > 2), poly&>::type operator*=(
poly&& __x) {
std::min(vector::size(), __x.size()) > _Conv_threshold
? conv_ntt(std::move(__x))
: conv_naive(__x);
return *this;
}
poly& operator*=(const _Tp& __x) {
if (__x == static_cast<_Tp>(0))
vector::_M_erase_at_end(vector::_M_impl._M_start);
else
for (auto __i = vector::_M_impl._M_start;
__i != vector::_M_impl._M_finish; ++__i)
*__i *= __x;
return *this;
}
poly& operator/=(const _Tp& __x) {
assert(__x != static_cast<_Tp>(0));
for (auto __i = vector::_M_impl._M_start; __i != vector::_M_impl._M_finish;
++__i)
*__i /= __x;
return *this;
}
poly& operator/=(const poly& __x);
poly& operator%=(const poly& __x);
template <class _T> poly operator+(_T&& __x) const {
return poly(*this).operator+=(std::forward<_T>(__x));
}
template <class _T> poly operator-(_T&& __x) const {
return poly(*this).operator-=(std::forward<_T>(__x));
}
template <class _T> poly operator*(_T&& __x) const {
return poly(*this).operator*=(std::forward<_T>(__x));
}
template <class _T> poly operator/(_T&& __x) const {
return poly(*this).operator/=(std::forward<_T>(__x));
}
template <class _T> poly operator%(_T&& __x) const {
return poly(*this).operator%=(std::forward<_T>(__x));
}
};
} // namespace workspace
#line 28 "other/y.cc"
namespace workspace {
using mint = modint<998244353>;
using poly = polynomial<mint>;
auto fa = factorial<mint>;
auto fi = factorial_inverse<mint>;
auto b = binomial<mint>;
void main() {
// start here!
int h, w, k;
cin >> h >> w >> k;
--h, --w;
k /= 2;
++k;
const auto n = min(h, w);
poly fv;
for (auto r : range(k * 2)) {
poly p;
for (auto i : range(n / k + 1)) {
p[i] = fi(k * 2 * i + r);
}
p *= p;
for (auto i = r, j = 0; i <= n; i += k * 2, j += 2) {
fv[i] += p[j];
}
for (auto i = r < k ? r + k : r - k; i <= n; i += k * 2) {
if (i >= k) fv[i] -= p[(i - k) / k / 2 + (i + k) / k / 2];
}
}
mint ans;
for (auto i : range(n + 1)) {
ans += fv[i] * fi(h - i) * fi(w - i);
}
ans *= fa(h + w);
cout << ans << "\n";
}
} // namespace workspace