結果
問題 | No.117 組み合わせの数 |
ユーザー | takkun_k_t |
提出日時 | 2020-05-11 17:21:06 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 123 ms / 5,000 ms |
コード長 | 4,937 bytes |
コンパイル時間 | 1,330 ms |
コンパイル使用メモリ | 167,984 KB |
実行使用メモリ | 35,200 KB |
最終ジャッジ日時 | 2024-07-18 14:40:06 |
合計ジャッジ時間 | 1,975 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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ソースコード
#include<bits/stdc++.h> #define rep(i,a,b) for(int i=a;i<b;i++) #define rrep(i,a,b) for(int i=a;i>=b;i--) #define fore(i,a) for(auto &i:a) #define all(x) (x).begin(),(x).end() #pragma GCC optimize ("-O3") using namespace std; void _main(); int main() { cin.tie(0); ios::sync_with_stdio(false); _main(); } typedef long long ll; const int inf = INT_MAX / 2; const ll infl = 1LL << 60; template<class T>bool chmax(T &a, const T &b) { if (a<b) { a = b; return 1; } return 0; } template<class T>bool chmin(T &a, const T &b) { if (b<a) { a = b; return 1; } return 0; } //--------------------------------------------------------------------------------------------------- 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);rep(i, 1, FAC_MAX) fac[i] = fac[i - 1] * i; rep(i, 1, FAC_MAX) ifac[i] = T(1) / fac[i];} 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); }}; // nHk = (n+k-1)Ck typedef ModInt<998244353> mint; /*--------------------------------------------------------------------------------------------------- ∧_∧ ∧_∧ (´<_` ) Welcome to My Coding Space! ( ´_ゝ`) / ⌒i / \ | | / / ̄ ̄ ̄ ̄/ | __(__ニつ/ _/ .| .|____ \/____/ (u ⊃ ---------------------------------------------------------------------------------------------------*/ ll mod = 1000000007; //--------------------------------------------------------------------------------------------------- ll f[2010101], rf[2010101]; ll inv(ll x) { ll res = 1; ll k = mod - 2; ll y = x; while (k) { if (k & 1) res = (res * y) % mod; y = (y * y) % mod; k /= 2; } return res; } void init() { f[0] = 1; rep(i, 1, 2010101) f[i] = (f[i - 1] * i) % mod; rf[2010101 - 1] = inv(f[2010101 - 1]); rrep(i, 2010101 - 2, 0) rf[i] = (rf[i + 1] * (i + 1)) % mod; } //--------------------------------------------------------------------------------------------------- ll C(int n, int k) { if (k < 0 || n < k) return 0; ll a = f[n]; // = n! ll b = rf[n - k]; // = (n-k)! ll c = rf[k]; // = k! ll bc = (b * c) % mod; return (a * bc) % mod; } ll P(int n, int k) { if (k < 0 || n < k) return 0; ll a = f[n]; // = n! ll b = rf[n - k]; // = (n-k)! return (a * b) % mod; } ll H(int n, int k) { if (n == 0 && k == 0) return 1; return C(n + k - 1, k); } //--------------------------------------------------------------------------------------------------- void _main() { init(); int T; cin >> T; rep(t, 0, T) { string s; cin >> s; char c; int a, b; sscanf(s.c_str(), "%c(%d,%d)", &c, &a, &b); int ans; if (c == 'C') ans = C(a, b); else if (c == 'P') ans = P(a, b); else ans = H(a, b); printf("%d\n", ans); } }