結果

問題 No.1035 Color Box
ユーザー stoqstoq
提出日時 2020-04-24 21:51:55
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 20 ms / 2,000 ms
コード長 4,657 bytes
コンパイル時間 1,482 ms
コンパイル使用メモリ 171,524 KB
実行使用メモリ 8,064 KB
最終ジャッジ日時 2024-10-15 02:43:48
合計ジャッジ時間 2,759 ms
ジャッジサーバーID
(参考情報)
judge4 / judge5
このコードへのチャレンジ
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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 18 ms
7,808 KB
testcase_01 AC 8 ms
7,936 KB
testcase_02 AC 8 ms
7,936 KB
testcase_03 AC 9 ms
7,936 KB
testcase_04 AC 8 ms
7,936 KB
testcase_05 AC 9 ms
7,936 KB
testcase_06 AC 9 ms
7,808 KB
testcase_07 AC 8 ms
7,936 KB
testcase_08 AC 17 ms
7,936 KB
testcase_09 AC 11 ms
7,808 KB
testcase_10 AC 8 ms
7,808 KB
testcase_11 AC 8 ms
7,936 KB
testcase_12 AC 8 ms
7,808 KB
testcase_13 AC 16 ms
7,936 KB
testcase_14 AC 18 ms
7,936 KB
testcase_15 AC 19 ms
7,808 KB
testcase_16 AC 9 ms
7,808 KB
testcase_17 AC 8 ms
7,936 KB
testcase_18 AC 8 ms
7,808 KB
testcase_19 AC 20 ms
7,936 KB
testcase_20 AC 8 ms
7,936 KB
testcase_21 AC 8 ms
7,936 KB
testcase_22 AC 8 ms
7,808 KB
testcase_23 AC 7 ms
7,936 KB
testcase_24 AC 8 ms
7,808 KB
testcase_25 AC 8 ms
7,808 KB
testcase_26 AC 9 ms
7,808 KB
testcase_27 AC 9 ms
7,936 KB
testcase_28 AC 8 ms
7,808 KB
testcase_29 AC 7 ms
7,936 KB
testcase_30 AC 7 ms
8,064 KB
testcase_31 AC 8 ms
7,808 KB
testcase_32 AC 8 ms
7,936 KB
testcase_33 AC 8 ms
7,808 KB
testcase_34 AC 8 ms
7,936 KB
testcase_35 AC 8 ms
7,936 KB
testcase_36 AC 8 ms
7,808 KB
testcase_37 AC 8 ms
7,936 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

#pragma region Macros
#include <bits/stdc++.h>
using namespace std;
//#include <boost/multiprecision/cpp_int.hpp>
//using multiInt = boost::multiprecision::cpp_int;

using ll = long long int;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using pld = pair<ld, ld>;
template <typename Q_type>
using smaller_queue = priority_queue<Q_type, vector<Q_type>, greater<Q_type>>;

constexpr int MOD_TYPE = 1;
constexpr ll MOD = (MOD_TYPE == 1 ? (ll)(1e9 + 7) : 998244353);
constexpr int INF = (int)1e9;
constexpr ll LINF = (ll)4e18;
constexpr ld PI = acos(-1.0);
constexpr ld EPS = 1e-11;
constexpr int Dx[] = {0, 0, -1, 1, -1, 1, -1, 1, 0};
constexpr int Dy[] = {1, -1, 0, 0, -1, -1, 1, 1, 0};

#define REP(i, m, n) for (ll i = m; i < (ll)(n); ++i)
#define rep(i, n) REP(i, 0, n)
#define MP make_pair
#define MT make_tuple
#define YES(n) cout << ((n) ? "YES" : "NO") << "\n"
#define Yes(n) cout << ((n) ? "Yes" : "No") << "\n"
#define possible(n) cout << ((n) ? "possible" : "impossible") << "\n"
#define Possible(n) cout << ((n) ? "Possible" : "Impossible") << "\n"
#define Yay(n) cout << ((n) ? "Yay!" : ":(") << "\n"
#define all(v) v.begin(), v.end()
#define NP(v) next_permutation(all(v))
#define dbg(x) cerr << #x << ":" << x << "\n";

#pragma endregion

template <int MOD>
struct Fp
{
  long long val;

  constexpr Fp(long long v = 0) noexcept : val(v % MOD)
  {
    if (val < 0)
      v += MOD;
  }

  constexpr int getmod()
  {
    return MOD;
  }

  constexpr Fp operator-() const noexcept
  {
    return val ? MOD - val : 0;
  }

  constexpr Fp operator+(const Fp &r) const noexcept
  {
    return Fp(*this) += r;
  }

  constexpr Fp operator-(const Fp &r) const noexcept
  {
    return Fp(*this) -= r;
  }

  constexpr Fp operator*(const Fp &r) const noexcept
  {
    return Fp(*this) *= r;
  }

  constexpr Fp operator/(const Fp &r) const noexcept
  {
    return Fp(*this) /= r;
  }

  constexpr Fp &operator+=(const Fp &r) noexcept
  {
    val += r.val;
    if (val >= MOD)
      val -= MOD;
    return *this;
  }

  constexpr Fp &operator-=(const Fp &r) noexcept
  {
    val -= r.val;
    if (val < 0)
      val += MOD;
    return *this;
  }

  constexpr Fp &operator*=(const Fp &r) noexcept
  {
    val = val * r.val % MOD;
    return *this;
  }

  constexpr Fp &operator/=(const Fp &r) noexcept
  {
    long long a = r.val, b = MOD, u = 1, v = 0;
    while (b)
    {
      long long t = a / b;
      a -= t * b;
      swap(a, b);
      u -= t * v;
      swap(u, v);
    }
    val = val * u % MOD;
    if (val < 0)
      val += MOD;
    return *this;
  }

  constexpr bool operator==(const Fp &r) const noexcept
  {
    return this->val == r.val;
  }

  constexpr bool operator!=(const Fp &r) const noexcept
  {
    return this->val != r.val;
  }

  friend constexpr ostream &operator<<(ostream &os, const Fp<MOD> &x) noexcept
  {
    return os << x.val;
  }

  friend constexpr istream &operator>>(istream &is, Fp<MOD> &x) noexcept
  {
    return is >> x.val;
  }
};

Fp<MOD> modpow(const Fp<MOD> &a, long long n) noexcept
{
  if (n == 0)
    return 1;
  auto t = modpow(a, n / 2);
  t = t * t;
  if (n & 1)
    t = t * a;
  return t;
}

using mint = Fp<MOD>;

template <class T>
struct BiCoef
{
  vector<T> fact_, inv_, finv_;

  constexpr BiCoef()
  {
  }

  constexpr BiCoef(int n) noexcept : fact_(n, 1), inv_(n, 1), finv_(n, 1)
  {
    init(n);
  }

  constexpr void init(int n) noexcept
  {
    fact_.assign(n, 1), inv_.assign(n, 1), finv_.assign(n, 1);
    int MOD = fact_[0].getmod();
    for (int i = 2; i < n; i++)
    {
      fact_[i] = fact_[i - 1] * i;
      inv_[i] = -inv_[MOD % i] * (MOD / i);
      finv_[i] = finv_[i - 1] * inv_[i];
    }
  }

  constexpr T C(int n, int k) const noexcept
  {
    if (n < k || n < 0 || k < 0)
      return 0;
    return fact_[n] * finv_[k] * finv_[n - k];
  }

  constexpr T P(int n, int k) const noexcept
  {
    return C(n, k) * fact_[k];
  }

  constexpr T H(int n, int k) const noexcept
  {
    return C(n + k - 1, k);
  }

  constexpr T fact(int n) const noexcept
  {
    if (n < 0)
      return 0;
    return fact_[n];
  }

  constexpr T inv(int n) const noexcept
  {
    if (n < 0)
      return 0;
    return inv_[n];
  }

  constexpr T finv(int n) const noexcept
  {
    if (n < 0)
      return 0;
    return finv_[n];
  }
};

BiCoef<mint> bc(200010);

void solve()
{
  ll n, m;
  cin >> n >> m;
  mint ans = 0;
  for (ll i = 1; i <= m; i++)
  {
    ans = modpow(i, n) * bc.C(m, i) - ans;
  }
  cout << ans << endl;
}

int main()
{
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout << setprecision(30) << setiosflags(ios::fixed);

  solve();

  return 0;
}
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