結果
問題 | No.117 組み合わせの数 |
ユーザー | miscalc |
提出日時 | 2022-05-22 06:07:55 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,652 bytes |
コンパイル時間 | 4,564 ms |
コンパイル使用メモリ | 264,592 KB |
実行使用メモリ | 26,752 KB |
最終ジャッジ日時 | 2024-09-20 12:22:56 |
合計ジャッジ時間 | 4,983 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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ソースコード
#include <bits/stdc++.h> using namespace std; //* #include <atcoder/all> using namespace atcoder; //using mint = modint998244353; using mint = modint1000000007; //*/ using ll = long long; using ld = long double; using pll = pair<ll, ll>; using tlll = tuple<ll, ll, ll>; constexpr ll INF = 1LL << 60; template<class T> bool chmin(T& a, T b) {if (a > b) {a = b; return true;} return false;} template<class T> bool chmax(T& a, T b) {if (a < b) {a = b; return true;} return false;} ll safemod(ll A, ll M) {return (A % M + M) % M;} ll divfloor(ll A, ll B) {if (B < 0) {return divfloor(-A, -B);} return (A - safemod(A, B)) / B;} ll divceil(ll A, ll B) {if (B < 0) {return divceil(-A, -B);} return divfloor(A + B - 1, B);} ll mypowl(ll A, ll B) {ll res = 1; for (int i = 0; i < B; i++) {res *= A;} return res;} template<class T> void unique(vector<T> &V) {V.erase(unique(V.begin(), V.end()), V.end());} template<class T> void sortunique(vector<T> &V) {sort(V.begin(), V.end()); V.erase(unique(V.begin(), V.end()), V.end());} #define FINALANS(A) do {cout << (A) << '\n'; exit(0);} while (false) template<class T> void printvec(const vector<T> &V) {int _n = V.size(); for (int i = 0; i < _n; i++) cout << V[i] << (i == _n - 1 ? "" : " ");cout << '\n';} template<class T> void printvect(const vector<T> &V) {for (auto v : V) cout << v << '\n';} template<class T> void printvec2(const vector<vector<T>> &V) {for (auto &v : V) printvec(v);} // http://drken1215.hatenablog.com/entry/2018/06/08/210000 template<class T = mint> class combination { public: vector<T> fac, finv, inv; combination(int M) { fac.resize(M + 1); finv.resize(M + 1); inv.resize(M + 1); //* fac[0] = T(1); for (int i = 1; i <= M; i++) fac[i] = fac[i - 1] * mint::raw(i); finv[M] = fac[M].inv(); for (int i = M - 1; i >= 0; i--) finv[i] = finv[i + 1] * mint::raw(i + 1); //*/ /* fac[0] = T(1), finv[0] = T(1); fac[1] = T(1), finv[1] = T(1), inv[1] = T(1); for (int i = 2; i <= M; i++) { fac[i] = fac[i - 1] * i; inv[i] = -inv[T::mod() % i] * (T::mod() / i); finv[i] = finv[i - 1] * inv[i]; } //*/ } T P(int N, int K) { if (N < K) return 0; if (N < 0 || K < 0) return 0; return fac[N] * finv[N - K]; } T C(int N, int K) { if (N < K) return 0; if (N < 0 || K < 0) return 0; return fac[N] * finv[K] * finv[N - K]; } T H(int N, int K) { return C(N + K - 1, K); } }; /* const ll MOD = 998244353; class combination { public: vector<ll> fac, finv, inv; combination(ll M) { fac.resize(M + 1); finv.resize(M + 1); inv.resize(M + 1); fac.at(0) = 1, finv.at(0) = 1; fac.at(1) = 1, finv.at(1) = 1, inv.at(1) = 1; for (ll i = 2; i <= M; i++) { fac[i] = fac[i - 1] * i % MOD; inv[i] = MOD - inv.at(MOD % i) * (MOD / i) % MOD; finv[i] = finv[i - 1] * inv[i] % MOD; } } constexpr ll P(ll N, ll K) { if (N < K) return 0; if (N < 0 || K < 0) return 0; return fac.at(N) * finv.at(N - K) % MOD; } constexpr ll C(ll N, ll K) { if (N < K) return 0; if (N < 0 || K < 0) return 0; return fac.at(N) * (finv.at(K) * finv.at(N - K) % MOD) % MOD; } constexpr ll H(ll N, ll K) { return C(N + K - 1, K); } }; //*/ int main() { combination com(2000010); int T; cin >> T; while (T--) { char c1, c2, c3, c4; int N, K; cin >> c1 >> c2 >> N >> c3 >> K >> c4; if (c1 == 'P') cout << com.P(N, K).val() << '\n'; else if (c1 == 'C') cout << com.C(N, K).val() << '\n'; else if (c1 == 'H') cout << com.H(N, K).val() << '\n'; } }