結果
問題 | No.1500 Super Knight |
ユーザー | KoD |
提出日時 | 2021-05-07 22:03:03 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 23 ms / 2,000 ms |
コード長 | 4,957 bytes |
コンパイル時間 | 1,907 ms |
コンパイル使用メモリ | 194,216 KB |
最終ジャッジ日時 | 2025-01-21 08:09:57 |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 33 |
ソースコード
#include <bits/stdc++.h> using i32 = std::int32_t; using u32 = std::uint32_t; using i64 = std::int64_t; using u64 = std::uint64_t; using i128 = __int128_t; using u128 = __uint128_t; using isize = std::ptrdiff_t; using usize = std::size_t; class rep { struct Iter { usize itr; constexpr Iter(const usize pos) noexcept : itr(pos) {} constexpr void operator++() noexcept { ++itr; } constexpr bool operator!=(const Iter& other) const noexcept { return itr != other.itr; } constexpr usize operator*() const noexcept { return itr; } }; const Iter first, last; public: explicit constexpr rep(const usize first, const usize last) noexcept : first(first), last(std::max(first, last)) {} constexpr Iter begin() const noexcept { return first; } constexpr Iter end() const noexcept { return last; } }; template <class T> constexpr T totient(T x) { T ret = x; for (T i = 2; i * i <= x; ++i) { if (x % i == 0) { ret /= i; ret *= i - 1; while (x % i == 0) x /= i; } } if (x > 1) { ret /= x; ret *= x - 1; } return ret; } template <class T> constexpr T rem_euclid(T value, const T& mod) { return (value %= mod) >= 0 ? value : value + mod; } template <u32 MOD, std::enable_if_t<((u32)1 <= MOD and MOD <= ((u32)1 << 31))>* = nullptr> class StaticModint { using Mint = StaticModint; static inline constexpr u32 PHI = totient(MOD); u32 v; public: static constexpr u32 mod() noexcept { return MOD; } template <class T, std::enable_if_t<std::is_signed_v<T> and std::is_integral_v<T>>* = nullptr> static constexpr T normalize(const T x) noexcept { return rem_euclid<std::common_type_t<T, i64>>(x, MOD); } template <class T, std::enable_if_t<std::is_unsigned_v<T> and std::is_integral_v<T>>* = nullptr> static constexpr T normalize(const T x) noexcept { return x % MOD; } constexpr StaticModint() noexcept : v(0) {} template <class T> constexpr StaticModint(const T x) noexcept : v(normalize(x)) {} template <class T> static constexpr Mint raw(const T x) noexcept { Mint ret; ret.v = x; return ret; } constexpr u32 get() const noexcept { return v; } constexpr Mint neg() const noexcept { return raw(v == 0 ? 0 : MOD - v); } constexpr Mint inv() const noexcept { return pow(PHI - 1); } constexpr Mint pow(u64 exp) const noexcept { Mint ret(1), mult(*this); for (; exp > 0; exp >>= 1) { if (exp & 1) ret *= mult; mult *= mult; } return ret; } constexpr Mint operator-() const noexcept { return neg(); } constexpr Mint operator~() const noexcept { return inv(); } constexpr Mint operator+(const Mint& rhs) const noexcept { return Mint(*this) += rhs; } constexpr Mint& operator+=(const Mint& rhs) noexcept { if ((v += rhs.v) >= MOD) v -= MOD; return *this; } constexpr Mint operator-(const Mint& rhs) const noexcept { return Mint(*this) -= rhs; } constexpr Mint& operator-=(const Mint& rhs) noexcept { if (v < rhs.v) v += MOD; v -= rhs.v; return *this; } constexpr Mint operator*(const Mint& rhs) const noexcept { return Mint(*this) *= rhs; } constexpr Mint& operator*=(const Mint& rhs) noexcept { v = (u64)v * rhs.v % MOD; return *this; } constexpr Mint operator/(const Mint& rhs) const noexcept { return Mint(*this) /= rhs; } constexpr Mint& operator/=(const Mint& rhs) noexcept { return *this *= rhs.inv(); } constexpr bool operator==(const Mint& rhs) const noexcept { return v == rhs.v; } constexpr bool operator!=(const Mint& rhs) const noexcept { return v != rhs.v; } friend std::ostream& operator<<(std::ostream& stream, const Mint& rhs) { return stream << rhs.v; } }; using Modint1000000007 = StaticModint<1000000007>; using Modint998244353 = StaticModint<998244353>; template <class T> using Vec = std::vector<T>; constexpr u32 ANS[] = {1, 12, 65}; using Fp = Modint1000000007; void B_main() { u64 N; std::cin >> N; if (N <= 2) { std::cout << ANS[N] << '\n'; } else { if (N % 2 == 0) { const auto L = (N - 4) / 2; std::cout << Fp(297) + Fp(352) * Fp(L) + Fp(68) * Fp(L) * Fp(L - 1) << '\n'; } else { const auto L = (N - 3) / 2; std::cout << Fp(172) + Fp(284) * Fp(L) + Fp(68) * Fp(L) * Fp(L - 1) << '\n'; } } } int main() { std::ios_base::sync_with_stdio(false); std::cin.tie(nullptr); B_main(); return 0; }