#line 1 "other-workspace\\y.cc"
#if defined(ONLINE_JUDGE)  // && 0
#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,mmx,avx,avx2")
#endif

// #undef _GLIBCXX_DEBUG
#include <bits/extc++.h>

#line 2 "Library\\lib\\alias"

/**
 * @file alias
 * @brief Alias
 */

#line 10 "Library\\lib\\alias"

// #include "bit"
#line 2 "Library\\lib\\limits"

#line 4 "Library\\lib\\limits"

namespace workspace {

template <class _Tp> struct numeric_limits : std::numeric_limits<_Tp> {};

#ifdef __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 workspace
#line 13 "Library\\lib\\alias"

namespace workspace {

constexpr static 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 128-bit integer is not available.
#endif

template <class _T1, class _T2,
          typename = decltype(std::declval<const _T2 &>() <
                              std::declval<const _T1 &>())>
constexpr
    typename std::conditional<std::is_same<_T1, _T2>::value, const _T1 &,
                              typename std::common_type<_T1, _T2>::type>::type
    min(const _T1 &__x, const _T2 &__y) noexcept {
  return __y < __x ? __y : __x;
}

template <class _T1, class _T2, class _Compare,
          typename = decltype(std::declval<_Compare>()(
              std::declval<const _T2 &>(), std::declval<const _T1 &>()))>
constexpr
    typename std::conditional<std::is_same<_T1, _T2>::value, const _T1 &,
                              typename std::common_type<_T1, _T2>::type>::type
    min(const _T1 &__x, const _T2 &__y, _Compare __comp) noexcept {
  return __comp(__y, __x) ? __y : __x;
}

template <class _Tp, typename = decltype(std::declval<const _Tp &>() <
                                         std::declval<const _Tp &>())>
constexpr _Tp min(std::initializer_list<_Tp> __x) noexcept {
  return *std::min_element(__x.begin(), __x.end());
}

template <class _Tp, class _Compare,
          typename = decltype(std::declval<_Compare>()(
              std::declval<const _Tp &>(), std::declval<const _Tp &>()))>
constexpr _Tp min(std::initializer_list<_Tp> __x, _Compare __comp) noexcept {
  return *std::min_element(__x.begin(), __x.end(), __comp);
}

template <class _T1, class _T2,
          typename = decltype(std::declval<const _T1 &>() <
                              std::declval<const _T2 &>())>

constexpr
    typename std::conditional<std::is_same<_T1, _T2>::value, const _T1 &,
                              typename std::common_type<_T1, _T2>::type>::type
    max(const _T1 &__x, const _T2 &__y) noexcept {
  return __x < __y ? __y : __x;
}

template <class _T1, class _T2, class _Compare,
          typename = decltype(std::declval<_Compare>()(
              std::declval<const _T1 &>(), std::declval<const _T2 &>()))>
constexpr
    typename std::conditional<std::is_same<_T1, _T2>::value, const _T1 &,
                              typename std::common_type<_T1, _T2>::type>::type
    max(const _T1 &__x, const _T2 &__y, _Compare __comp) noexcept {
  return __comp(__x, __y) ? __y : __x;
}

template <class _Tp, typename = decltype(std::declval<const _Tp &>() <
                                         std::declval<const _Tp &>())>
constexpr _Tp max(std::initializer_list<_Tp> __x) noexcept {
  return *std::max_element(__x.begin(), __x.end());
}

template <class _Tp, class _Compare,
          typename = decltype(std::declval<_Compare>()(
              std::declval<const _Tp &>(), std::declval<const _Tp &>()))>
constexpr _Tp max(std::initializer_list<_Tp> __x, _Compare __comp) noexcept {
  return *std::max_element(__x.begin(), __x.end(), __comp);
}

}  // namespace workspace
#line 10 "other-workspace\\y.cc"
// #include "lib/cxx20"
#line 2 "Library\\src\\sys\\call_once.hpp"

/**
 * @file call_once.hpp
 * @brief Call Once
 */

#line 9 "Library\\src\\sys\\call_once.hpp"

namespace workspace {

/**
 * @brief Call once.
 */
template <class _F> void call_once(_F &&__f) {
  static std::unordered_set<void *> __called;
  if (__called.count(std::addressof(__f))) return;
  __called.emplace(std::addressof(__f));
  __f();
}

}  // namespace workspace
#line 2 "Library\\src\\sys\\clock.hpp"

/**
 * @file 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

/**
 * @return Elapsed time of the program.
 */
decltype(auto) elapsed() noexcept {
  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 1 "Library\\lib\\utils"
// #include "src/utils/cached.hpp"
// #include "src/utils/cat.hpp"
#line 2 "Library\\src\\utils\\chval.hpp"

/**
 * @file chval.hpp
 * @brief Change Less/Greater
 */

#line 9 "Library\\src\\utils\\chval.hpp"

namespace workspace {

/**
 * @brief Substitute __y for __x if __y < __x.
 * @param __x Reference
 * @param __y Comparison target
 * @return Whether or not __x is updated.
 */
template <class _T1, class _T2,
          typename = decltype(std::declval<_T2>() < std::declval<_T1 &>())>
typename std::enable_if<std::is_assignable<_T1 &, _T2>::value, bool>::type chle(
    _T1 &__x, _T2 &&__y) noexcept {
  return __y < __x ? __x = std::forward<_T2>(__y), true : false;
}

/**
 * @brief Substitute __y for __x if __x < __y.
 * @param __x Reference
 * @param __y Comparison target
 * @return Whether or not __x is updated.
 */
template <class _T1, class _T2,
          typename = decltype(std::declval<_T1 &>() < std::declval<_T2>())>
typename std::enable_if<std::is_assignable<_T1 &, _T2>::value, bool>::type chgr(
    _T1 &__x, _T2 &&__y) noexcept {
  return __x < __y ? __x = std::forward<_T2>(__y), true : false;
}

/**
 * @brief Substitute __y for __x if __comp(__y, __x) is true.
 * @param __x Reference
 * @param __y Comparison target
 * @param __comp Compare function object
 * @return Whether or not __x is updated.
 */
template <class _T1, class _T2, class _Compare,
          typename = decltype(std::declval<_Compare>()(std::declval<_T2>(),
                                                       std::declval<_T1 &>()))>
typename std::enable_if<std::is_assignable<_T1 &, _T2>::value, bool>::type chle(
    _T1 &__x, _T2 &&__y, _Compare __comp) noexcept {
  return __comp(__y, __x) ? __x = std::forward<_T2>(__y), true : false;
}

/**
 * @brief Substitute __y for __x if __comp(__x, __y) is true.
 * @param __x Reference
 * @param __y Comparison target
 * @param __comp Compare function object
 * @return Whether or not __x is updated.
 */
template <class _T1, class _T2, class _Compare,
          typename = decltype(std::declval<_Compare>()(std::declval<_T1 &>(),
                                                       std::declval<_T2>()))>
typename std::enable_if<std::is_assignable<_T1 &, _T2>::value, bool>::type chgr(
    _T1 &__x, _T2 &&__y, _Compare __comp) noexcept {
  return __comp(__x, __y) ? __x = std::forward<_T2>(__y), true : false;
}

}  // namespace workspace
#line 4 "Library\\lib\\utils"
// #include "src/utils/fixed_point.hpp"
// #include "src/utils/hash.hpp"
// #include "src/utils/io/istream.hpp"
// #include "src/utils/io/ostream.hpp"
// #include "src/utils/io/read.hpp"
// #include "src/utils/grid/motion.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 {

/**
 * @brief Setup I/O.
 * @param __n Standard output precision
 */
void io_setup(int __n) {
  std::cin.tie(0)->sync_with_stdio(0);
  std::cout << std::fixed << std::setprecision(__n);

#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 11 "Library\\lib\\utils"
// #include "src/utils/iterator/category.hpp"
// #include "src/utils/iterator/reverse.hpp"
// #include "src/utils/make_vector.hpp"
// #include "src/utils/py-like/enumerate.hpp"
#line 2 "Library\\src\\utils\\py-like\\range.hpp"

/**
 * @file range.hpp
 * @brief Range
 */

#line 2 "Library\\src\\utils\\py-like\\reversed.hpp"

/**
 * @file reversed.hpp
 * @brief Reversed
 */

#line 9 "Library\\src\\utils\\py-like\\reversed.hpp"

#line 2 "Library\\lib\\cxx17"

#line 2 "Library\\lib\\cxx14"

#ifndef _CXX14_CONSTEXPR
#if __cplusplus >= 201402L
#define _CXX14_CONSTEXPR constexpr
#else
#define _CXX14_CONSTEXPR
#endif
#endif
#line 4 "Library\\lib\\cxx17"

#ifndef _CXX17_CONSTEXPR
#if __cplusplus >= 201703L
#define _CXX17_CONSTEXPR constexpr
#else
#define _CXX17_CONSTEXPR
#endif
#endif

#ifndef _CXX17_STATIC_ASSERT
#if __cplusplus >= 201703L
#define _CXX17_STATIC_ASSERT static_assert
#else
#define _CXX17_STATIC_ASSERT assert
#endif
#endif

#line 22 "Library\\lib\\cxx17"

#if __cplusplus < 201703L

namespace std {

/**
 *  @brief  Return the size of a container.
 *  @param  __cont  Container.
 */
template <typename _Container>
constexpr auto size(const _Container& __cont) noexcept(noexcept(__cont.size()))
    -> decltype(__cont.size()) {
  return __cont.size();
}

/**
 *  @brief  Return the size of an array.
 */
template <typename _Tp, size_t _Nm>
constexpr size_t size(const _Tp (&)[_Nm]) noexcept {
  return _Nm;
}

/**
 *  @brief  Return whether a container is empty.
 *  @param  __cont  Container.
 */
template <typename _Container>
[[nodiscard]] constexpr auto empty(const _Container& __cont) noexcept(
    noexcept(__cont.empty())) -> decltype(__cont.empty()) {
  return __cont.empty();
}

/**
 *  @brief  Return whether an array is empty (always false).
 */
template <typename _Tp, size_t _Nm>
[[nodiscard]] constexpr bool empty(const _Tp (&)[_Nm]) noexcept {
  return false;
}

/**
 *  @brief  Return whether an initializer_list is empty.
 *  @param  __il  Initializer list.
 */
template <typename _Tp>
[[nodiscard]] constexpr bool empty(initializer_list<_Tp> __il) noexcept {
  return __il.size() == 0;
}

struct monostate {};

}  // namespace std

#else

#include <variant>

#endif
#line 11 "Library\\src\\utils\\py-like\\reversed.hpp"

namespace workspace {

// Reversed container.
template <class _Container> class reversed {
  _Container __c;

 public:
  template <class _Tp>
  constexpr reversed(_Tp &&__x) noexcept : __c(std::forward<_Container>(__x)) {}

  template <class _Tp>
  constexpr reversed(std::initializer_list<_Tp> __x) noexcept : __c(__x) {}

  constexpr decltype(auto) begin() noexcept { return std::rbegin(__c); }
  constexpr decltype(auto) begin() const noexcept { return std::rbegin(__c); }

  constexpr decltype(auto) end() noexcept { return std::rend(__c); }
  constexpr decltype(auto) end() const noexcept { return std::rend(__c); }

  constexpr bool empty() const noexcept { return std::empty(__c); }

  constexpr decltype(auto) size() const noexcept { return std::size(__c); }

  using iterator = decltype(std::rbegin(__c));
  using const_iterator = decltype(std::crbegin(__c));

  using size_type = decltype(std::size(__c));
  using difference_type =
      typename std::iterator_traits<iterator>::difference_type;
  using value_type = typename std::iterator_traits<iterator>::value_type;

  using reference = typename std::iterator_traits<iterator>::reference;
  using const_reference =
      typename std::iterator_traits<const_iterator>::reference;
};

#if __cpp_deduction_guides >= 201606L

template <class _Tp> reversed(_Tp &&) -> reversed<_Tp>;

template <class _Tp>
reversed(std::initializer_list<_Tp>) -> reversed<std::initializer_list<_Tp>>;

#endif

}  // namespace workspace
#line 9 "Library\\src\\utils\\py-like\\range.hpp"

namespace workspace {

template <class _Index> class range {
  _Index __first, __last;

 public:
  class iterator {
    _Index __i;

   public:
    using difference_type = std::ptrdiff_t;
    using value_type = _Index;
    using pointer = void;
    using reference = value_type;
    using iterator_category = std::random_access_iterator_tag;

    constexpr iterator() = default;
    constexpr iterator(const _Index &__x) noexcept : __i(__x) {}

    constexpr bool operator==(const iterator &__x) const noexcept {
      return __i == __x.__i;
    }
    constexpr bool operator!=(const iterator &__x) const noexcept {
      return __i != __x.__i;
    }

    constexpr bool operator<(const iterator &__x) const noexcept {
      return __i < __x.__i;
    }
    constexpr bool operator<=(const iterator &__x) const noexcept {
      return __i <= __x.__i;
    }

    constexpr bool operator>(const iterator &__x) const noexcept {
      return __i > __x.__i;
    }
    constexpr bool operator>=(const iterator &__x) const noexcept {
      return __i >= __x.__i;
    }

    constexpr iterator &operator++() noexcept {
      ++__i;
      return *this;
    }
    constexpr iterator operator++(int) noexcept {
      auto __tmp = *this;
      ++__i;
      return __tmp;
    }

    constexpr iterator &operator--() noexcept {
      --__i;
      return *this;
    }
    constexpr iterator operator--(int) noexcept {
      auto __tmp = *this;
      --__i;
      return __tmp;
    }

    constexpr difference_type operator-(const iterator &__x) const noexcept {
      return __i - __x.__i;
    }

    constexpr iterator &operator+=(difference_type __x) noexcept {
      __i += __x;
      return *this;
    }
    constexpr iterator operator+(difference_type __x) const noexcept {
      return iterator(*this) += __x;
    }

    constexpr iterator &operator-=(difference_type __x) noexcept {
      __i -= __x;
      return *this;
    }
    constexpr iterator operator-(difference_type __x) const noexcept {
      return iterator(*this) -= __x;
    }

    constexpr reference operator*() const noexcept { return __i; }
  };

  using value_type = _Index;
  using reference = value_type;

  using difference_type = std::ptrdiff_t;
  using size_type = std::size_t;

  using const_iterator = iterator;

  using reverse_iterator = std::reverse_iterator<iterator>;
  using const_reverse_iterator = reverse_iterator;

  template <class _Tp1, class _Tp2>
  constexpr range(const _Tp1 &__first, const _Tp2 &__last) noexcept
      : __first(__first), __last(__last) {}

  template <class _Tp>
  constexpr range(const _Tp &__last) noexcept : __first(), __last(__last) {}

  constexpr iterator begin() const noexcept { return {__first}; }
  constexpr const_iterator cbegin() const noexcept { return begin(); }

  constexpr iterator end() const noexcept { return {__last}; }
  constexpr const_iterator cend() const noexcept { return end(); }

  constexpr reverse_iterator rbegin() const noexcept {
    return reverse_iterator{end()};
  }
  constexpr const_reverse_iterator crbegin() const noexcept { return rbegin(); }

  constexpr reverse_iterator rend() const noexcept {
    return reverse_iterator{begin()};
  }
  constexpr const_reverse_iterator crend() const noexcept { return rend(); }

  constexpr size_type size() const noexcept {
    return std::distance(__first, __last);
  }
};

#if __cpp_deduction_guides >= 201606L

template <class _Tp1, class _Tp2>
range(const _Tp1 &, const _Tp2 &)
    -> range<std::decay_t<decltype(++std::declval<_Tp1 &>())>>;

template <class _Tp>
range(const _Tp &) -> range<std::decay_t<decltype(++std::declval<_Tp &>())>>;

template <class... _Args>
constexpr decltype(auto) rrange(_Args &&...__args) noexcept {
  return reversed(range(std::forward<_Args>(__args)...));
}

#endif

}  // namespace workspace
#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 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; };

template <> struct is_signed<__uint128_t> : std::false_type {};
template <> struct is_signed<__int128_t> : std::true_type {};

template <> struct is_unsigned<__uint128_t> : std::true_type {};
template <> struct is_unsigned<__int128_t> : std::false_type {};

#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;

/**
 * @brief Return type of subscripting ( @c [] ) access.
 */
template <class _Tp>
using subscripted_type =
    typename std::decay<decltype(std::declval<_Tp&>()[0])>::type;

template <class Container>
using element_type = typename std::decay<decltype(*std::begin(
    std::declval<Container&>()))>::type;

template <class _Tp, class = void> struct has_begin : std::false_type {};

template <class _Tp>
struct has_begin<
    _Tp, std::__void_t<decltype(std::begin(std::declval<const _Tp&>()))>>
    : std::true_type {
  using type = decltype(std::begin(std::declval<const _Tp&>()));
};

template <class _Tp, class = void> struct has_size : std::false_type {};

template <class _Tp>
struct has_size<_Tp, std::__void_t<decltype(std::size(std::declval<_Tp>()))>>
    : std::true_type {};

template <class _Tp, class = void> struct has_resize : std::false_type {};

template <class _Tp>
struct has_resize<_Tp, std::__void_t<decltype(std::declval<_Tp>().resize(
                           std::declval<size_t>()))>> : std::true_type {};

template <class _Tp, class = void> struct has_mod : std::false_type {};

template <class _Tp>
struct has_mod<_Tp, std::__void_t<decltype(_Tp::mod)>> : std::true_type {};

template <class _Tp, class = void> struct is_integral_ext : std::false_type {};
template <class _Tp>
struct is_integral_ext<
    _Tp, typename std::enable_if<std::is_integral<_Tp>::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 _Tp>
constexpr static bool is_integral_ext_v = is_integral_ext<_Tp>::value;

#endif

template <typename _Tp, typename = void> struct multiplicable_uint {
  using type = uint_least32_t;
};
template <typename _Tp>
struct multiplicable_uint<
    _Tp,
    typename std::enable_if<(2 < sizeof(_Tp)) &&
                            (!__INT128_DEFINED__ || sizeof(_Tp) <= 4)>::type> {
  using type = uint_least64_t;
};

#if __INT128_DEFINED__

template <typename _Tp>
struct multiplicable_uint<_Tp,
                          typename std::enable_if<(4 < sizeof(_Tp))>::type> {
  using type = __uint128_t;
};

#endif

template <typename _Tp> struct multiplicable_int {
  using type =
      typename std::make_signed<typename multiplicable_uint<_Tp>::type>::type;
};

template <typename _Tp> struct multiplicable {
  using type = std::conditional_t<
      is_integral_ext<_Tp>::value,
      std::conditional_t<std::is_signed<_Tp>::value,
                         typename multiplicable_int<_Tp>::type,
                         typename multiplicable_uint<_Tp>::type>,
      _Tp>;
};

template <class> struct first_arg { using type = void; };

template <class _R, class _Tp, class... _Args>
struct first_arg<_R(_Tp, _Args...)> {
  using type = _Tp;
};

template <class _R, class _Tp, class... _Args>
struct first_arg<_R (*)(_Tp, _Args...)> {
  using type = _Tp;
};

template <class _G, class _R, class _Tp, class... _Args>
struct first_arg<_R (_G::*)(_Tp, _Args...)> {
  using type = _Tp;
};

template <class _G, class _R, class _Tp, class... _Args>
struct first_arg<_R (_G::*)(_Tp, _Args...) const> {
  using type = _Tp;
};

template <class _Tp, class = void> struct parse_compare : first_arg<_Tp> {};

template <class _Tp>
struct parse_compare<_Tp, std::__void_t<decltype(&_Tp::operator())>>
    : first_arg<decltype(&_Tp::operator())> {};

template <class _Container, class = void> struct get_dimension {
  static constexpr size_t value = 0;
};

template <class _Container>
struct get_dimension<_Container,
                     std::enable_if_t<has_begin<_Container>::value>> {
  static constexpr size_t value =
      1 + get_dimension<typename std::iterator_traits<
              typename has_begin<_Container>::type>::value_type>::value;
};

}  // namespace workspace
#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\rand\tree.hpp"
// #include "src\utils\reference_list.hpp"
#line 2 "Library\\src\\utils\\io\\input.hpp"

/**
 * @file input.hpp
 * @brief Input
 */

#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 16 "Library\\src\\utils\\io\\istream.hpp"

namespace workspace {

namespace _istream_impl {

template <class _Tp, typename = void> struct helper {
  helper(std::istream &__is, _Tp &__x) {
    if _CXX17_CONSTEXPR (has_begin<_Tp &>::value)
      for (auto &&__e : __x) helper<std::decay_t<decltype(__e)>>(__is, __e);
    else
      static_assert(has_begin<_Tp>::value, "istream unsupported type.");
  }
};

template <class _Tp>
struct helper<_Tp, std::__void_t<decltype(std::declval<std::istream &>() >>
                                          std::declval<_Tp &>())>> {
  helper(std::istream &__is, _Tp &__x) { __is >> __x; }
};

#ifdef __SIZEOF_INT128__

template <> struct helper<__uint128_t, void> {
  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 helper<__int128_t, void> {
  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 helper<std::pair<_T1, _T2>> {
  helper(std::istream &__is, std::pair<_T1, _T2> &__x) {
    helper<_T1>(__is, __x.first), helper<_T2>(__is, __x.second);
  }
};

template <class... _Tp> struct helper<std::tuple<_Tp...>> {
  helper(std::istream &__is, std::tuple<_Tp...> &__x) { iterate(__is, __x); }

 private:
  template <class _Tuple, size_t _Nm = 0>
  void iterate(std::istream &__is, _Tuple &__x) {
    if _CXX17_CONSTEXPR (_Nm != std::tuple_size<_Tuple>::value) {
      helper<typename std::tuple_element<_Nm, _Tuple>::type>(
          __is, std::get<_Nm>(__x)),
          iterate<_Tuple, _Nm + 1>(__is, __x);
    }
  }
};

}  // namespace _istream_impl

/**
 * @brief A wrapper class for std::istream.
 */
class istream : public std::istream {
 public:
  /**
   * @brief Wrapped operator.
   */
  template <typename _Tp> istream &operator>>(_Tp &__x) {
    _istream_impl::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 10 "Library\\src\\utils\\io\\input.hpp"

namespace workspace {

namespace _input_impl {

template <class _Tp, bool _Is_class = false> class input {
  _Tp __value;

  template <class... _Args> struct is_convertible : std::false_type {};
  template <class _Arg>
  struct is_convertible<_Arg> : std::is_convertible<_Arg, _Tp> {};

 public:
  operator _Tp &() noexcept { return __value; }
  operator const _Tp &() const noexcept { return __value; }

  template <class... _Args>
  input(_Args &&...__args) noexcept : __value(std::forward<_Args>(__args)...) {
    if _CXX17_CONSTEXPR (not is_convertible<_Args...>::value) cin >> __value;
  }
};

template <class _Tp> class input<_Tp, true> : public _Tp {
  template <class... _Args> struct is_convertible : std::false_type {};
  template <class _Arg>
  struct is_convertible<_Arg> : std::is_convertible<_Arg, _Tp> {};

 public:
  operator _Tp &() noexcept { return *this; }
  operator const _Tp &() const noexcept { return *this; }

  template <class... _Args>
  input(_Args &&...__args) noexcept : _Tp(std::forward<_Args>(__args)...) {
    if _CXX17_CONSTEXPR (not is_convertible<_Args...>::value) cin >> *this;
  }

  template <class _E>
  input(std::initializer_list<_E> __l) noexcept : _Tp(__l) {}
};

}  // namespace _input_impl

// Standard input.
template <class _Tp = int_least64_t>
class input : public _input_impl::input<_Tp, std::is_class<_Tp>::value> {
 public:
  using _input_impl::input<_Tp, std::is_class<_Tp>::value>::input;
};

// Integrality.
template <class _Tp>
struct is_integral_ext<input<_Tp>> : is_integral_ext<_Tp> {};

}  // namespace workspace
#line 2 "Library\\src\\utils\\io\\print.hpp"

/**
 * @file print.hpp
 * @brief Print
 */

#line 2 "Library\\src\\utils\\io\\ostream.hpp"

/**
 * @file ostream.hpp
 * @brief Output Stream
 */

#line 9 "Library\\src\\utils\\io\\ostream.hpp"

#line 11 "Library\\src\\utils\\io\\ostream.hpp"

namespace workspace {

template <class _Os> struct is_ostream {
  template <typename... _Args>
  static std::true_type __test(std::basic_ostream<_Args...> *);
  static std::false_type __test(void *);
  constexpr static bool value = decltype(__test(std::declval<_Os *>()))::value;
};

template <class _Os>
using ostream_ref =
    typename std::enable_if<is_ostream<_Os>::value, _Os &>::type;

/**
 * @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), ostream_ref<_Os>>::type
operator<<(_Os &__os, const _Tp (&__a)[_Nm]) {
  if _CXX17_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::array.
 *
 * @param __os Output stream
 * @param __a Array
 * @return Reference to __os.
 */
template <class _Os, class _Tp, size_t _Nm>
ostream_ref<_Os> operator<<(_Os &__os, const std::array<_Tp, _Nm> &__a) {
  if _CXX17_CONSTEXPR (_Nm) {
    __os << __a[0];
    for (size_t __i = 1; __i != _Nm; ++__i) __os << ' ' << __a[__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>
ostream_ref<_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),
                        ostream_ref<_Os>>::type
operator<<(_Os &__os, const _Tp &__t) {
  if _CXX17_CONSTEXPR (_Nm != std::tuple_size<_Tp>::value) {
    if _CXX17_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_convertible<std::decay_t<_Container>, std::string>::value &&
        !std::is_convertible<std::decay_t<_Container>, char *>::value,
    ostream_ref<_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> ostream_ref<_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> ostream_ref<_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\\src\\utils\\io\\print.hpp"

namespace workspace {

/**
 * @brief Print
 * @tparam _Sep
 * @tparam _End
 */
template <char _Sep = ' ', char _End = '\n', class _Tp, class... _Args>
void print(_Tp &&__x, _Args &&...__args) noexcept {
  if _CXX17_CONSTEXPR (sizeof...(_Args))
    cout << __x << _Sep, print(std::forward<_Args>(__args)...);
  else
    cout << __x << _End;
}

void flush() noexcept { cout << std::flush; }

}  // namespace workspace
#line 13 "other-workspace\\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\\algebra\\linear\\matrix.hpp"

/**
 * @file matrix.hpp
 * @brief Matrix
 * @date 2021-02-15
 *
 *
 */

#line 13 "Library\\src\\algebra\\linear\\matrix.hpp"

namespace workspace {

/**
 * @brief Fixed size matrix.
 *
 * @tparam _Scalar
 * @tparam _Rows Number of rows
 * @tparam _Cols Number of columns
 */
template <class _Scalar, std::size_t _Rows = 0, std::size_t _Cols = _Rows>
class matrix {
 public:
  _Scalar __data[_Rows][_Cols] = {};

  using value_type = _Scalar;
  using size_type = std::size_t;

  constexpr static matrix eye() {
    static_assert(_Rows == _Cols);

    matrix __e;
    for (size_type __d = 0; __d != _Rows; ++__d) __e.__data[__d][__d] = 1;
    return __e;
  }

  constexpr operator decltype((__data))() { return __data; }
  constexpr operator decltype(std::declval<const matrix>().__data)
      const&() const {
    return __data;
  }

  constexpr auto begin() { return __data; }
  constexpr auto begin() const { return __data; }

  constexpr auto end() { return __data + _Rows; }
  constexpr auto end() const { return __data + _Rows; }

  constexpr size_type rows() const { return _Rows; }

  constexpr size_type cols() const { return _Cols; }

  constexpr auto transpose() const {
    matrix<_Scalar, _Cols, _Rows> __t;

    for (size_type __r = 0; __r != _Rows; ++__r)
      for (size_type __c = 0; __c != _Cols; ++__c)
        __t.__data[__c][__r] = __data[__r][__c];

    return __t;
  }

  constexpr matrix operator+() const { return *this; }

  constexpr matrix operator-() const {
    matrix __cp = *this;

    for (auto& __v : __cp.__data)
      for (auto& __e : __v) __e = -__e;

    return __cp;
  }

  template <class _Matrix> constexpr matrix& operator+=(const _Matrix& __x) {
    auto __m = std::min(_Rows, __x.rows());
    auto __n = std::min(_Cols, __x.cols());

    for (size_type __r = 0; __r != __m; ++__r)
      for (size_type __c = 0; __c != __n; ++__c)
        __data[__r][__c] += __x[__r][__c];

    return *this;
  }

  template <class _Matrix>
  constexpr matrix operator+(const _Matrix& __x) const {
    return matrix(*this) += __x;
  }

  template <class _Matrix> constexpr matrix& operator-=(const _Matrix& __x) {
    auto __m = std::min(_Rows, __x.rows());
    auto __n = std::min(_Cols, __x.cols());

    for (size_type __r = 0; __r != __m; ++__r)
      for (size_type __c = 0; __c != __n; ++__c)
        __data[__r][__c] -= __x[__r][__c];

    return *this;
  }

  template <class _Matrix>
  constexpr matrix operator-(const _Matrix& __x) const {
    return matrix(*this) -= __x;
  }

  template <class _Scalar2>
  constexpr matrix& operator*=(const matrix<_Scalar2, _Cols, _Cols>& __x) {
    if (this == &__x) return operator=(operator*(__x));

    for (auto& __r : __data) {
      _Scalar __tmp[_Cols] = {};

      auto __v = *__x.__data;
      for (auto& __w : __tmp) {
        auto __i = __v++;
        for (const auto& __e : __r) __w += __e * *__i, __i += _Cols;
      }

      auto __w = __tmp;
      for (auto& __e : __r) __e = std::move(*__w++);
    }

    return *this;
  }

  template <class _Scalar2, size_type _Rows2, size_type _Cols2>
  constexpr auto operator*(const matrix<_Scalar2, _Rows2, _Cols2>& __x) const {
    matrix<typename std::common_type<_Scalar, _Scalar2>::type, _Rows, _Cols2>
        __m;

    auto __w = *__m.__data;
    for (const auto& __r : __data)
      for (auto __v = *__x.__data, __v_end = __v + _Cols2; __v != __v_end;
           ++__w) {
        auto __i = __v++;
        for (auto __e = __r; __e != __r + std::min(_Cols, _Rows2); ++__e)
          *__w += *__e * *__i, __i += _Cols2;
      }

    return __m;
  }

  template <class _Matrix>
  constexpr
      typename std::enable_if<!std::is_convertible<_Matrix, value_type>::value,
                              matrix<_Scalar>>::type
      operator*(const _Matrix& __x) const {
    matrix<_Scalar> __m(_Rows, __x.cols());

    for (size_type __r = 0; __r != _Rows; ++__r)
      for (size_type __i = 0; __i != __x.cols(); ++__i)
        for (size_type __c = 0; __c != std::min(_Cols, __x.rows()); ++__c)
          __m[__r][__i] += __data[__r][__c] * __x[__c][__i];

    return __m;
  }

  constexpr matrix& operator*=(const value_type& __x) {
    for (auto& __v : __data)
      for (auto& __e : __v) __e *= __x;

    return *this;
  }

  constexpr matrix operator*(const value_type& __x) const {
    return matrix(*this) *= __x;
  }

  constexpr matrix& operator/=(const value_type& __x) {
    assert(__x != value_type(0));

    for (auto& __v : __data)
      for (auto& __e : __v) __e /= __x;

    return *this;
  }

  constexpr matrix operator/(const value_type& __x) const {
    return matrix(*this) /= __x;
  }

  template <class _Int> constexpr matrix pow(_Int __e) const {
    assert(0 <= __e);

    matrix __m = eye();
    for (matrix __cp = *this; __e; __cp *= __cp, __e >>= 1)
      if (__e & 1) __m *= __cp;

    return __m;
  }

  template <class _Os>
  constexpr friend _Os& operator<<(_Os& __os, const matrix& __x) {
    for (auto __i = __x.begin(); __i != __x.end(); ++__i, __os << '\n')
      for (size_type __c = 0; __c != _Cols; ++__c)
        __c ? void(__os << ' ') : (void)0, __os << *(*__i + __c);

    return __os;
  }
};  // namespace workspace

/**
 * @brief Dynamic matrix.
 *
 * @tparam _Scalar
 * @tparam _Rows Number of rows
 * @tparam _Cols Number of columns
 */
template <class _Scalar>
class matrix<_Scalar, 0, 0> : public std::valarray<std::valarray<_Scalar>> {
  using base = std::valarray<std::valarray<_Scalar>>;
  using row_type = typename base::value_type;

 public:
  using value_type = _Scalar;
  using size_type = std::size_t;

  using base::operator[];

  static matrix eye(size_type __n) {
    matrix __e(__n, __n);
    for (size_type __d = 0; __d != __n; ++__d) __e[__d][__d] = 1;
    return __e;
  }

  matrix() = default;

  matrix(size_type __n) : matrix(__n, __n) {}

  matrix(size_type __m, size_type __n) : base(row_type(__n), __m) {}

  template <class _Tp, typename = typename std::enable_if<
                           std::is_constructible<base, _Tp>::value &&
                           !std::is_constructible<size_type, _Tp>::value>::type>
  matrix(_Tp&& __x) : base(__x) {}

  matrix(std::initializer_list<row_type> __x) : base(__x) {}

  size_type rows() const { return base::size(); }

  size_type cols() const { return rows() ? operator[](0).size() : 0; }

  matrix transpose() const {
    matrix __t(cols(), rows());

    for (size_type __r = 0; __r != rows(); ++__r)
      for (size_type __c = 0; __c != cols(); ++__c)
        __t[__c][__r] = operator[](__r)[__c];

    return __t;
  }

  void resize(size_type __m, size_type __n) {
    matrix __t(__m, __n);

    if (rows() < __m) __m = rows();
    if (cols() < __n) __n = cols();

    for (size_type __r = 0; __r != __m; ++__r)
      for (size_type __c = 0; __c != __n; ++__c)
        __t[__r][__c] = std::move(operator[](__r)[__c]);

    base::swap(__t);
  }

  // binary operators {{

  template <class _Matrix, typename = void>
  struct is_valarray_based : std::false_type {};

  template <class _Matrix>
  struct is_valarray_based<
      _Matrix,
      typename std::enable_if<std::is_same<
          row_type, typename std::decay<decltype(
                        std::declval<_Matrix>()[0])>::type>::value>::type>
      : std::true_type {};

  template <class _Matrix>
  typename std::enable_if<!std::is_convertible<_Matrix, value_type>::value,
                          matrix&>::type
  operator*=(_Matrix&& __x) {
    return *this = operator*(std::forward<_Matrix>(__x));
  }

  template <class _Matrix>
  typename std::enable_if<!std::is_convertible<_Matrix, value_type>::value,
                          matrix>::type
  operator*(const _Matrix& __x) const {
    matrix __m(rows(), __x.cols());

    if constexpr (is_valarray_based<_Matrix>::value)
      for (size_type __r = 0; __r != rows(); ++__r)
        for (size_type __c = 0; __c != std::min(cols(), __x.rows()); ++__c)
          __m[__r] += operator[](__r)[__c] * __x[__c];

    else
      for (size_type __r = 0; __r != rows(); ++__r)
        for (size_type __i = 0; __i != __x.cols(); ++__i)
          for (size_type __c = 0; __c != std::min(cols(), __x.rows()); ++__c)
            __m[__r][__i] += operator[](__r)[__c] * __x[__c][__i];

    return __m;
  }

  matrix& operator*=(const value_type& __x) {
    for (size_type __r = 0; __r != rows(); ++__r)
      operator[](__r).operator*=(__x);

    return *this;
  }

  matrix operator*(const value_type& __x) const { return matrix(*this) *= __x; }

  friend matrix operator*(const value_type& __x, matrix __i) {
    for (size_type __r = 0; __r != __i.rows(); ++__r)
      __i.operator[](__r) = __x * __i.operator[](__r);

    return __i;
  }

  matrix& operator/=(const value_type& __x) {
    assert(__x != value_type(0));

    for (size_type __r = 0; __r != rows(); ++__r)
      operator[](__r).operator/=(__x);

    return *this;
  }

  matrix operator/(const value_type& __x) const { return matrix(*this) /= __x; }

  // }} binary operators

  template <class _Int> matrix pow(_Int __e) const {
    assert(0 <= __e);

    matrix __m = eye(rows());
    for (matrix __cp = *this; __e; __cp *= __cp, __e >>= 1)
      if (__e & 1) __m *= __cp;

    return __m;
  }

  // template <class _Is> friend _Is& operator>>(_Is& __is, matrix& __x) {
  //   for (size_type __r = 0; __r != __x.rows(); ++__r)
  //     for (size_type __c = 0; __c != __x.cols(); ++__c)
  //       __is >> __x.operator[](__r).operator[](__c);

  //   return __is;
  // }

  template <class _Os> friend _Os& operator<<(_Os& __os, const matrix& __x) {
    for (size_type __r = 0; __r != __x.rows(); ++__r, __os << '\n')
      for (size_type __c = 0; __c != __x.cols(); ++__c)
        __c ? void(__os << ' ') : (void)0,
            __os << __x.operator[](__r).operator[](__c);

    return __os;
  }
};

}  // namespace workspace
#line 2 "Library\\src\\algebra\\modint.hpp"

/**
 * @file modint.hpp
 *
 * @brief Modular Arithmetic
 */

#line 12 "Library\\src\\algebra\\modint.hpp"

#line 2 "Library\\src\\number_theory\\sqrt_mod.hpp"

/**
 * @file sqrt_mod.hpp
 * @brief Tonelli-Shanks Algorithm
 */

#line 2 "Library\\src\\number_theory\\pow_mod.hpp"

/**
 * @file mod_pow.hpp
 * @brief Modular Exponentiation
 */

#line 9 "Library\\src\\number_theory\\pow_mod.hpp"

#line 11 "Library\\src\\number_theory\\pow_mod.hpp"

namespace workspace {

/**
 * @brief Compile time modular exponentiation.
 *
 * @param __x
 * @param __n Exponent
 * @param __mod Modulus
 * @return
 */
template <class _Tp>
constexpr std::enable_if_t<(is_integral_ext<_Tp>::value), _Tp> pow_mod(
    _Tp __x, _Tp __n, _Tp __mod) noexcept {
  assert(__mod > 0);

  using mul_type = typename multiplicable_uint<_Tp>::type;

  if ((__x %= __mod) < 0) __x += __mod;

  mul_type __y{1};

  while (__n) {
    if (__n & 1) (__y *= __x) %= __mod;
    __x = (mul_type)__x * __x % __mod;
    __n >>= 1;
  }

  return __y;
};

}  // namespace workspace
#line 10 "Library\\src\\number_theory\\sqrt_mod.hpp"

namespace workspace {

/**
 * @brief Compile time modular square root.
 *
 * @param __x
 * @param __mod Modulus
 * @return One if it exists. Otherwise -1.
 */
template <class _Tp>
constexpr std::enable_if_t<(is_integral_ext<_Tp>::value), _Tp> sqrt_mod(
    _Tp __x, _Tp __mod) noexcept {
  assert(__mod > 0);

  using mul_type = typename multiplicable_uint<_Tp>::type;

  if ((__x %= __mod) < 0) __x += __mod;

  if (!__x) return 0;

  if (__mod == 2) return __x;

  if (pow_mod(__x, __mod >> 1, __mod) != 1) return -1;

  _Tp __z = __builtin_ctz(__mod - 1), __q = __mod >> __z;

  mul_type __a = pow_mod(__x, (__q + 1) >> 1, __mod), __b = 2;
  while (pow_mod<_Tp>(__b, __mod >> 1, __mod) == 1) ++__b;
  __b = pow_mod<_Tp>(__b, __q, __mod);

  _Tp __shift = 0;

  for (auto __r = __a * __a % __mod * pow_mod(__x, __mod - 2, __mod) % __mod;
       __r != 1; (__r *= (__b *= __b) %= __mod) %= __mod) {
    auto __bsf = __z;

    for (auto __e = __r; __e != 1; --__bsf) (__e *= __e) %= __mod;

    while (++__shift != __bsf) (__b *= __b) %= __mod;

    (__a *= __b) %= __mod;
  }

  return __a;
};

}  // namespace workspace
#line 15 "Library\\src\\algebra\\modint.hpp"

namespace workspace {

namespace _modint_impl {

template <auto _Mod, unsigned _Storage> struct modint {
  static_assert(is_integral_ext<decltype(_Mod)>::value,
                "_Mod must be integral type.");

  using mod_type = std::make_signed_t<typename std::conditional<
      0 < _Mod, std::add_const_t<decltype(_Mod)>, decltype(_Mod)>::type>;

  using value_type = std::decay_t<mod_type>;

  using reference = value_type &;
  using const_reference = value_type const &;

  using mul_type = typename multiplicable_uint<value_type>::type;

  static mod_type mod;  // Modulus.

  static unsigned storage;

 private:
  template <class _Tp>
  using modint_if = std::enable_if_t<is_integral_ext<_Tp>::value, modint>;

  value_type value = 0;  // within [0, mod).

  struct direct_ctor_t {};
  constexpr static direct_ctor_t direct_ctor_tag{};

  // Direct constructor
  template <class _Tp>
  constexpr modint(_Tp __n, direct_ctor_t) noexcept : value(__n) {}

 public:
  constexpr modint() noexcept = default;

  template <class _Tp, class = std::enable_if_t<
                           std::is_convertible<_Tp, value_type>::value>>
  constexpr modint(_Tp __n) noexcept
      : value((__n %= mod) < 0 ? value_type(__n + mod) : value_type(__n)) {}

  constexpr modint(bool __n) noexcept : value(__n) {}

  constexpr operator reference() noexcept { return value; }

  constexpr operator const_reference() const noexcept { return value; }

  // unary operators {{
  constexpr modint operator++(int) noexcept {
    modint __t{*this};
    operator++();
    return __t;
  }

  constexpr modint operator--(int) noexcept {
    modint __t{*this};
    operator--();
    return __t;
  }

  constexpr modint &operator++() noexcept {
    if (++value == mod) value = 0;
    return *this;
  }

  constexpr modint &operator--() noexcept {
    if (!value)
      value = mod - 1;
    else
      --value;
    return *this;
  }

  constexpr modint operator+() const noexcept { return *this; }

  constexpr modint operator-() const noexcept {
    return {value ? mod - value : 0, direct_ctor_tag};
  }

  // }} unary operators

  // operator+= {{

  constexpr modint &operator+=(const modint &__x) noexcept {
    if ((value += __x.value) >= mod) value -= mod;
    return *this;
  }

  template <class _Tp> constexpr modint_if<_Tp> &operator+=(_Tp __x) noexcept {
    __x %= mod, value += __x;
    if (value < 0)
      value += mod;
    else if (value >= mod)
      value -= mod;
    return *this;
  }

  // }} operator+=

  // operator+ {{

  template <class _Tp>
  constexpr modint_if<_Tp> operator+(_Tp const &__x) const noexcept {
    return modint{*this} += __x;
  }

  constexpr modint operator+(modint __x) const noexcept { return __x += *this; }

  template <class _Tp>
  constexpr friend modint_if<_Tp> operator+(_Tp const &__x,
                                            modint __y) noexcept {
    return __y += __x;
  }

  // }} operator+

  // operator-= {{

  constexpr modint &operator-=(const modint &__x) noexcept {
    if ((value -= __x.value) < 0) value += mod;
    return *this;
  }

  template <class _Tp> constexpr modint_if<_Tp> &operator-=(_Tp __x) noexcept {
    __x %= mod, value -= __x;
    if (value < 0)
      value += mod;
    else if (value >= mod)
      value -= mod;
    return *this;
  }

  // }} operator-=

  // operator- {{

  template <class _Tp>
  constexpr modint_if<_Tp> operator-(_Tp const &__x) const noexcept {
    return modint{*this} -= __x;
  }

  constexpr modint operator-(const modint &__x) const noexcept {
    return modint{*this} -= __x;
  }

  template <class _Tp>
  constexpr friend modint_if<_Tp> operator-(_Tp __x,
                                            const modint &__y) noexcept {
    if (((__x -= __y.value) %= mod) < 0) __x += mod;
    return {__x, direct_ctor_tag};
  }

  // }} operator-

  // operator*= {{

  constexpr modint &operator*=(const modint &__x) noexcept {
    value =
        static_cast<value_type>(value * static_cast<mul_type>(__x.value) % mod);
    return *this;
  }

  template <class _Tp> constexpr modint_if<_Tp> &operator*=(_Tp __x) noexcept {
    value = static_cast<value_type>(
        value * ((__x %= mod) < 0 ? mul_type(__x + mod) : mul_type(__x)) % mod);
    return *this;
  }

  // }} operator*=

  // operator* {{

  constexpr modint operator*(const modint &__x) const noexcept {
    return {static_cast<mul_type>(value) * __x.value % mod, direct_ctor_tag};
  }

  template <class _Tp>
  constexpr modint_if<_Tp> operator*(_Tp __x) const noexcept {
    __x %= mod;
    if (__x < 0) __x += mod;
    return {static_cast<mul_type>(value) * __x % mod, direct_ctor_tag};
  }

  template <class _Tp>
  constexpr friend modint_if<_Tp> operator*(_Tp __x,
                                            const modint &__y) noexcept {
    __x %= mod;
    if (__x < 0) __x += mod;
    return {static_cast<mul_type>(__x) * __y.value % mod, direct_ctor_tag};
  }

  // }} 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];
  }

  static value_type _div(mul_type __r, value_type __x) noexcept {
    assert(__x != value_type(0));
    if (!__r) return 0;

    std::make_signed_t<value_type> __v{};
    bool __neg = __x < 0 ? __x = -__x, true : false;

    if (static_cast<decltype(storage)>(__x) < storage)
      __v = _mem(__x);
    else {
      value_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;

    return __r == mul_type(1) ? static_cast<value_type>(__v)
                              : static_cast<value_type>(__r * __v % mod);
  }

 public:
  static void reserve(unsigned __n) noexcept {
    if (storage < __n) storage = __n;
  }

  // operator/= {{

  constexpr modint &operator/=(const modint &__x) noexcept {
    if (value) value = _div(value, __x.value);
    return *this;
  }

  template <class _Tp> constexpr modint_if<_Tp> &operator/=(_Tp __x) noexcept {
    if (value) value = _div(value, __x %= mod);
    return *this;
  }

  // }} operator/=

  // operator/ {{

  constexpr modint operator/(const modint &__x) const noexcept {
    if (!value) return {};
    return {_div(value, __x.value), direct_ctor_tag};
  }

  template <class _Tp>
  constexpr modint_if<_Tp> operator/(_Tp __x) const noexcept {
    if (!value) return {};
    return {_div(value, __x %= mod), direct_ctor_tag};
  }

  template <class _Tp>
  constexpr friend modint_if<_Tp> operator/(_Tp __x,
                                            const modint &__y) noexcept {
    if (!__x) return {};
    if ((__x %= mod) < 0) __x += mod;
    return {_div(__x, __y.value), direct_ctor_tag};
  }

  // }} operator/

  constexpr modint inv() const noexcept { return _div(1, value); }

  template <class _Tp> constexpr modint_if<_Tp> pow(_Tp __e) const noexcept {
    modint __r{mod != 1, direct_ctor_tag};

    for (modint __b{__e < 0 ? __e = -__e, _div(1, value) : value,
                              direct_ctor_tag};
         __e; __e >>= 1, __b *= __b)
      if (__e & 1) __r *= __b;

    return __r;
  }

  template <class _Tp>
  constexpr friend modint_if<_Tp> pow(modint __b, _Tp __e) noexcept {
    if (__e < 0) {
      __e = -__e;
      __b.value = _div(1, __b.value);
    }

    modint __r{mod != 1, direct_ctor_tag};

    for (; __e; __e >>= 1, __b *= __b)
      if (__e & 1) __r *= __b;

    return __r;
  }

  constexpr modint sqrt() const noexcept {
    return {sqrt_mod(value, mod), direct_ctor_tag};
  }

  friend constexpr modint sqrt(const modint &__x) noexcept {
    return {sqrt_mod(__x.value, mod), direct_ctor_tag};
  }

  friend std::istream &operator>>(std::istream &__is, modint &__x) noexcept {
    std::string __s;
    __is >> __s;
    bool __neg = false;
    if (__s.front() == '-') {
      __neg = true;
      __s.erase(__s.begin());
    }
    __x = 0;
    for (char __c : __s) __x = __x * 10 + (__c - '0');
    if (__neg) __x = -__x;
    return __is;
  }
};

template <auto _Mod, unsigned _Storage>
typename modint<_Mod, _Storage>::mod_type modint<_Mod, _Storage>::mod =
    _Mod > 0 ? _Mod : 0;

template <auto _Mod, unsigned _Storage>
unsigned modint<_Mod, _Storage>::storage = _Storage;

}  // namespace _modint_impl

template <auto _Mod, unsigned _Storage = 0,
          typename = std::enable_if_t<(_Mod > 0)>>
using modint = _modint_impl::modint<_Mod, _Storage>;

template <unsigned _Id = 0, unsigned _Storage = 0>
using runtime_modint = _modint_impl::modint<-(signed)_Id, 0>;

template <unsigned _Id = 0, unsigned _Storage = 0>
using runtime_modint64 = _modint_impl::modint<-(int_least64_t)_Id, 0>;

}  // namespace workspace
#line 30 "other-workspace\\y.cc"

namespace workspace {

using mint = modint<1000000007>;

void main() {
  // start here!

  // input<mint> c;
  mint c = 3;
  input n;
  auto m = 1;
  mint p{1}, q, p2, q2;

  matrix<mint> a(4);
  a[1][2] = 1 / c;
  a[0][3] = 1 - 1 / c;
  a[1][3] = 1 - 2 / c;
  a[0][0] = a[1][1] = 1 / c;
  a[2][0] = a[3][1] = 1;
  a = a.pow(n);
  print(1 - (1 - a[0][0]).pow(m));

  // while (n--) {
  //   auto np = p2, nq = q2;
  //   np += p / c;
  //   nq += q / c;
  //   p2 = q / c;
  //   q2 = p * (1 - 1 / c) + q * (1 - 2 / c);
  //   p = np, q = nq;
  //   assert(p + q + p2 + q2 == 1);
  // }
  // print(1 - (1 - p).pow(m));
}

}  // namespace workspace