結果

問題 No.117 組み合わせの数
ユーザー takkun_k_ttakkun_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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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 123 ms
35,200 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 #

#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);
    }
}
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