結果
問題 | No.117 組み合わせの数 |
ユーザー | paruki |
提出日時 | 2016-09-19 15:18:19 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
RE
|
実行時間 | - |
コード長 | 3,191 bytes |
コンパイル時間 | 1,959 ms |
コンパイル使用メモリ | 172,720 KB |
実行使用メモリ | 9,176 KB |
最終ジャッジ日時 | 2024-11-17 09:20:10 |
合計ジャッジ時間 | 3,732 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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ソースコード
#include "bits/stdc++.h" using namespace std; #define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i)) #define rep(i,j) FOR(i,0,j) #define each(x,y) for(auto &(x):(y)) #define mp make_pair #define all(x) (x).begin(),(x).end() #define debug(x) cout<<#x<<": "<<(x)<<endl #define smax(x,y) (x)=max((x),(y)) #define smin(x,y) (x)=min((x),(y)) #define MEM(x,y) memset((x),(y),sizeof (x)) #define sz(x) (int)(x).size() typedef long long ll; typedef pair<int, int> pii; typedef vector<int> vi; typedef vector<ll> vll; template<int MOD> class ModInt{ public: ModInt():value(0){} ModInt(long long val):value((int)(val<0?MOD+val%MOD:val%MOD)){ } ModInt& operator+=(ModInt that){ value = value+that.value; if(value>=MOD)value-=MOD; return *this; } ModInt& operator-=(ModInt that){ value -= that.value; if(value<0)value+=MOD; return *this; } ModInt& operator*=(ModInt that){ value = (int)((long long)value * that.value % 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 pow(long long k) const{ if(value == 0)return 0; ModInt n = *this, res = 1; while(k){ if(k & 1)res *= n; n *= n; k >>= 1; } return res; } ModInt inverse() const { long long a = value, 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); } return ModInt(u); } int toi() const{ return value; } private: int value; }; typedef ModInt<1000000007> mint; ostream& operator<<(ostream& os, const mint& x){ os << x.toi(); return os; } template <class Val> vector<Val> factorials(int n){ vector<Val> res(n + 1); res[0] = res[1] = 1; for(int i = 2; i <= n; ++i) res[i] = res[i - 1] * i; return res; } mint nPr(int n, int r, const vector<mint> &fact){ return fact[n]/fact[n-r]; } mint nCr(int n, int r, const vector<mint> &fact){ return fact[n] / (fact[r] * fact[n - r]); } mint nHr(int n, int r, const vector<mint> &fact){ return nCr(n + r - 1, r, fact); } char s_[100]; int main(){ auto fact = factorials<mint>((int)1e6); int T; cin >> T; while(T--){ scanf("%s", s_); string s(s_); each(c, s)if(c == '(' || c == ')'||c==',')c = ' '; stringstream ss(s); char c; int N, K; ss >> c >> N >> K; mint ans; if(c == 'C'){ if(K > N)ans = 0; else ans = nCr(N, K, fact); } else if(c == 'P'){ if(K > N)ans = 0; else ans = nPr(N, K, fact); } else{ ans = nHr(N, K, fact); } cout << ans << endl; } }