結果
問題 | No.2409 Strange Werewolves |
ユーザー | PAKACHU |
提出日時 | 2023-08-11 22:03:50 |
言語 | C++17(clang) (17.0.6 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 32 ms / 2,000 ms |
コード長 | 3,366 bytes |
コンパイル時間 | 5,148 ms |
コンパイル使用メモリ | 163,924 KB |
実行使用メモリ | 18,864 KB |
最終ジャッジ日時 | 2024-11-18 16:23:54 |
合計ジャッジ時間 | 5,097 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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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 | 31 ms
18,772 KB |
testcase_01 | AC | 31 ms
18,708 KB |
testcase_02 | AC | 31 ms
18,764 KB |
testcase_03 | AC | 32 ms
18,772 KB |
testcase_04 | AC | 32 ms
18,688 KB |
testcase_05 | AC | 31 ms
18,688 KB |
testcase_06 | AC | 31 ms
18,808 KB |
testcase_07 | AC | 31 ms
18,688 KB |
testcase_08 | AC | 31 ms
18,864 KB |
testcase_09 | AC | 31 ms
18,816 KB |
testcase_10 | AC | 31 ms
18,704 KB |
testcase_11 | AC | 31 ms
18,688 KB |
testcase_12 | AC | 32 ms
18,816 KB |
testcase_13 | AC | 31 ms
18,688 KB |
testcase_14 | AC | 32 ms
18,688 KB |
testcase_15 | AC | 32 ms
18,688 KB |
testcase_16 | AC | 32 ms
18,796 KB |
testcase_17 | AC | 32 ms
18,696 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; typedef long long int ll; typedef unsigned long long ull; typedef long double ld; int dx[8] = { 1, 0, -1, 0, 1, 1, -1, -1 }, dy[8] = { 0, 1, 0, -1, 1, -1, 1, -1 }; const long long mod = 998244353; const ll inf = 1LL << 60; const int INF = 5e8; template <int MOD> struct ModInt { static const int Mod = MOD; unsigned x; ModInt() : x(0) { } ModInt(signed sig) { x = sig < 0 ? sig % MOD + MOD : sig % MOD; } ModInt(signed long long sig) { x = sig < 0 ? sig % MOD + MOD : sig % MOD; } int get() const { return (int)x; } ModInt& operator+=(ModInt that) { if ((x += that.x) >= MOD) x -= MOD; return *this; } ModInt& operator-=(ModInt that) { if ((x += MOD - that.x) >= MOD) x -= MOD; return *this; } ModInt& operator*=(ModInt that) { x = (unsigned long long)x * that.x % MOD; return *this; } ModInt& operator/=(ModInt that) { return *this *= that.inverse(); } ModInt operator+(ModInt that) const { return ModInt(*this) += that; } ModInt operator-(ModInt that) const { return ModInt(*this) -= that; } ModInt operator*(ModInt that) const { return ModInt(*this) *= that; } ModInt operator/(ModInt that) const { return ModInt(*this) /= that; } ModInt inverse() const { long long a = x, b = MOD, u = 1, v = 0; while (b) { long long t = a / b; a -= t * b; std::swap(a, b); u -= t * v; std::swap(u, v); } return ModInt(u); } bool operator==(ModInt that) const { return x == that.x; } bool operator!=(ModInt that) const { return x != that.x; } ModInt operator-() const { ModInt t; t.x = x == 0 ? 0 : Mod - x; return t; } }; template <int MOD> ostream& operator<<(ostream& st, const ModInt<MOD> a) { st << a.get(); return st; }; template <int MOD> ModInt<MOD> operator^(ModInt<MOD> a, unsigned long long k) { ModInt<MOD> r = 1; while (k) { if (k & 1) r *= a; a *= a; k >>= 1; } return r; } template <typename T, int FAC_MAX> struct Comb { vector<T> fac, ifac; Comb() { fac.resize(FAC_MAX, 1); ifac.resize(FAC_MAX, 1); for (int i = 1; i < FAC_MAX; i++) fac[i] = fac[i - 1] * i; ifac[FAC_MAX - 1] = T(1) / fac[FAC_MAX - 1]; for (int i = FAC_MAX - 2; i >= 1; i--) ifac[i] = ifac[i + 1] * T(i + 1); } T aPb(int a, int b) { if (b < 0 || a < b) return T(0); return fac[a] * ifac[a - b]; } T aCb(int a, int b) { if (b < 0 || a < b) return T(0); return fac[a] * ifac[a - b] * ifac[b]; } T nHk(int n, int k) { if (n == 0 && k == 0) return T(1); if (n <= 0 || k < 0) return 0; return aCb(n + k - 1, k); } }; typedef ModInt<998244353> mint; Comb<mint, 2000009> comb; int main() { int x, y, z, w; cin >> x >> y >> z >> w; int a = x - z; int b = y - w; mint ans = comb.aPb(x, a) * comb.aPb(y, b); if (z == 0) ans *= comb.aCb(a + b - 1, b); else ans *= comb.aCb(a + b - 1, a); cout << ans << endl; }