結果
問題 | No.117 組み合わせの数 |
ユーザー | Haar |
提出日時 | 2019-06-24 08:30:50 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,158 bytes |
コンパイル時間 | 1,769 ms |
コンパイル使用メモリ | 178,596 KB |
実行使用メモリ | 33,220 KB |
最終ジャッジ日時 | 2024-06-10 04:15:40 |
合計ジャッジ時間 | 2,342 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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ソースコード
#include <bits/stdc++.h> #define LLI long long int #define FOR(v, a, b) for(LLI v = (a); v < (b); ++v) #define FORE(v, a, b) for(LLI v = (a); v <= (b); ++v) #define REP(v, n) FOR(v, 0, n) #define REPE(v, n) FORE(v, 0, n) #define REV(v, a, b) for(LLI v = (a); v >= (b); --v) #define ALL(x) (x).begin(), (x).end() #define RALL(x) (x).rbegin(), (x).rend() #define ITR(it, c) for(auto it = (c).begin(); it != (c).end(); ++it) #define RITR(it, c) for(auto it = (c).rbegin(); it != (c).rend(); ++it) #define EXIST(c,x) ((c).find(x) != (c).end()) #define fst first #define snd second #define popcount __builtin_popcount #define UNIQ(v) (v).erase(unique(ALL(v)), (v).end()) #define bit(i) (1LL<<(i)) #define sz(v) ((LLI)(v).size()) #ifdef DEBUG #include <misc/C++/Debug.cpp> #else #define dump(...) ((void)0) #endif #define gcd __gcd using namespace std; template <class T> constexpr T lcm(T m, T n){return m/gcd(m,n)*n;} template <typename I> void join(ostream &ost, I s, I t, string d=" "){for(auto i=s; i!=t; ++i){if(i!=s)ost<<d; ost<<*i;}ost<<endl;} template <typename T> istream& operator>>(istream &is, vector<T> &v){for(auto &a : v) is >> a; return is;} template <typename T, typename U> istream& operator>>(istream &is, pair<T,U> &p){is >> p.first >> p.second; return is;} template <typename T, typename U> bool chmin(T &a, const U &b){return (a>b ? a=b, true : false);} template <typename T, typename U> bool chmax(T &a, const U &b){return (a<b ? a=b, true : false);} template <typename T, size_t N, typename U> void fill_array(T (&a)[N], const U &v){fill((U*)a, (U*)(a+N), v);} LLI power(LLI n, LLI p, LLI m){ LLI ret = 1; while(p>0){ if(p&1) (ret *= n) %= m; (n *= n) %= m; p /= 2; } return ret; } LLI mod_inv(LLI n, LLI p){return power(n,p-2,p);} template <LLI mod> class Combination{ public: vector<LLI> facto = {1}; vector<LLI> ifacto = {1}; LLI factorial(LLI i){ if(i < 0) throw exception(); if(facto.size() <= i) facto.resize(i+1, -1); if(i == 0) return facto[0] = 1; LLI j = i; for(;j>=0;--j) if(facto[j] != -1) break; for(LLI k=j+1; k<=i; ++k) (facto[k] = facto[k-1] * k) %= mod; return facto[i]; } LLI factorial_inverse(LLI i){ if(i < 0) throw exception(); if(ifacto.size() <= i) ifacto.resize(i+1, -1); if(ifacto[i] != -1) return ifacto[i]; return ifacto[i] = mod_inv(factorial(i), mod); } LLI P(LLI n, LLI k){ if(n < k or n < 0 or k < 0) return 0; return (factorial(n) * factorial_inverse(n-k)) % mod; } LLI C(LLI n, LLI k){ if(n < k or n < 0 or k < 0) return 0; return (P(n,k) * factorial_inverse(k)) % mod; } LLI H(LLI n, LLI k){ return C(n+k-1, k); } }; const LLI mod = 1e9+7; int main(){ cin.tie(0); ios::sync_with_stdio(false); Combination<mod> com; int T; while(cin >> T){ REP(i,T){ char c; cin >> c; int n,k; cin.ignore(); cin >> n; cin.ignore(); cin >> k; cin.ignore(); if(c == 'C'){ cout << com.C(n,k) << endl; }else if(c == 'P'){ cout << com.P(n,k) << endl; }else{ cout << com.H(n,k) << endl; } } } return 0; }