結果
問題 | No.117 組み合わせの数 |
ユーザー | anta |
提出日時 | 2015-01-04 23:26:17 |
言語 | C++11 (gcc 11.4.0) |
結果 |
AC
|
実行時間 | 69 ms / 5,000 ms |
コード長 | 3,476 bytes |
コンパイル時間 | 927 ms |
コンパイル使用メモリ | 86,288 KB |
実行使用メモリ | 19,012 KB |
最終ジャッジ日時 | 2024-06-13 02:18:31 |
合計ジャッジ時間 | 1,781 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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コンパイルメッセージ
main.cpp: In function ‘int main()’: main.cpp:91:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 91 | scanf("%d", &T); while(getchar()!='\n'); | ~~~~~^~~~~~~~~~ main.cpp:96:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 96 | scanf("%c(%d,%d)%*c", &f, &N, &K); | ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
ソースコード
#define _CRT_SECURE_NO_WARNINGS #include <string> #include <vector> #include <algorithm> #include <numeric> #include <set> #include <map> #include <queue> #include <iostream> #include <sstream> #include <cstdio> #include <cmath> #include <ctime> #include <cstring> #include <cctype> #include <cassert> #include <limits> #include <functional> #include <bitset> #define rep(i,n) for(int (i)=0;(i)<(int)(n);++(i)) #define rer(i,l,u) for(int (i)=(int)(l);(i)<=(int)(u);++(i)) #define reu(i,l,u) for(int (i)=(int)(l);(i)<(int)(u);++(i)) #if defined(_MSC_VER) || __cplusplus > 199711L #define aut(r,v) auto r = (v) #else #define aut(r,v) __typeof(v) r = (v) #endif #define each(it,o) for(aut(it, (o).begin()); it != (o).end(); ++ it) #define all(o) (o).begin(), (o).end() #define pb(x) push_back(x) #define mp(x,y) make_pair((x),(y)) #define mset(m,v) memset(m,v,sizeof(m)) #define INF 0x3f3f3f3f #define INFL 0x3f3f3f3f3f3f3f3fLL using namespace std; typedef vector<int> vi; typedef pair<int,int> pii; typedef vector<pair<int,int> > vpii; typedef long long ll; typedef vector<long long> vl; typedef pair<long long,long long> pll; typedef vector<pair<long long,long long> > vpll; typedef vector<string> vs; typedef long double ld; template<typename T, typename U> inline void amin(T &x, U y) { if(y < x) x = y; } template<typename T, typename U> inline void amax(T &x, U y) { if(x < y) x = y; } template<int MOD> struct ModInt { static const int Mod = MOD; unsigned x; ModInt(): x(0) { } ModInt(signed sig) { int sigt = sig % MOD; if(sigt < 0) sigt += MOD; x = sigt; } ModInt(signed long long sig) { int sigt = sig % MOD; if(sigt < 0) sigt += MOD; x = sigt; } 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); } }; typedef ModInt<1000000007> mint; vector<mint> fact, factinv; void nCr_computeFactinv(int N) { N = min(N, mint::Mod - 1); fact.resize(N+1); factinv.resize(N+1); fact[0] = 1; rer(i, 1, N) fact[i] = fact[i-1] * i; factinv[N] = fact[N].inverse(); for(int i = N; i >= 1; i --) factinv[i-1] = factinv[i] * i; } mint nCr(int n, int r) { if(n >= mint::Mod) return nCr(n % mint::Mod, r % mint::Mod) * nCr(n / mint::Mod, r / mint::Mod); return r > n ? 0 : fact[n] * factinv[n-r] * factinv[r]; } mint nHr(int n, int r) { return r == 0 ? 1 : nCr(n+r-1, r); } mint nPr(int n, int r) { return nCr(n, r) * fact[r]; } int main() { int T; scanf("%d", &T); while(getchar()!='\n'); nCr_computeFactinv(2000000); rep(ii, T) { char f; int N, K; scanf("%c(%d,%d)%*c", &f, &N, &K); mint ans; if(f == 'C') ans = nCr(N, K); else if(f == 'P') ans = nPr(N, K); else if(f == 'H') ans = nHr(N, K); printf("%d\n", ans.get()); } return 0; }