結果
問題 | No.329 全射 |
ユーザー | minami |
提出日時 | 2019-03-30 10:56:34 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 23 ms / 2,000 ms |
コード長 | 3,924 bytes |
コンパイル時間 | 2,055 ms |
コンパイル使用メモリ | 178,408 KB |
実行使用メモリ | 7,552 KB |
最終ジャッジ日時 | 2024-11-08 09:04:00 |
合計ジャッジ時間 | 4,030 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
(要ログイン)
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 | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,248 KB |
testcase_03 | AC | 2 ms
5,248 KB |
testcase_04 | AC | 2 ms
5,248 KB |
testcase_05 | AC | 2 ms
5,248 KB |
testcase_06 | AC | 2 ms
5,248 KB |
testcase_07 | AC | 2 ms
5,248 KB |
testcase_08 | AC | 2 ms
5,248 KB |
testcase_09 | AC | 2 ms
5,248 KB |
testcase_10 | AC | 2 ms
5,248 KB |
testcase_11 | AC | 2 ms
5,248 KB |
testcase_12 | AC | 2 ms
5,248 KB |
testcase_13 | AC | 22 ms
7,552 KB |
testcase_14 | AC | 15 ms
7,168 KB |
testcase_15 | AC | 15 ms
7,424 KB |
testcase_16 | AC | 16 ms
7,424 KB |
testcase_17 | AC | 18 ms
7,424 KB |
testcase_18 | AC | 21 ms
7,424 KB |
testcase_19 | AC | 23 ms
7,552 KB |
testcase_20 | AC | 21 ms
7,552 KB |
testcase_21 | AC | 18 ms
7,424 KB |
testcase_22 | AC | 22 ms
7,424 KB |
testcase_23 | AC | 10 ms
7,040 KB |
testcase_24 | AC | 10 ms
7,040 KB |
testcase_25 | AC | 14 ms
7,040 KB |
testcase_26 | AC | 11 ms
7,040 KB |
testcase_27 | AC | 8 ms
6,784 KB |
testcase_28 | AC | 6 ms
5,888 KB |
testcase_29 | AC | 7 ms
7,040 KB |
testcase_30 | AC | 6 ms
6,016 KB |
testcase_31 | AC | 3 ms
5,248 KB |
testcase_32 | AC | 7 ms
6,528 KB |
testcase_33 | AC | 15 ms
7,040 KB |
testcase_34 | AC | 14 ms
7,040 KB |
testcase_35 | AC | 17 ms
6,912 KB |
testcase_36 | AC | 15 ms
7,040 KB |
testcase_37 | AC | 13 ms
7,040 KB |
testcase_38 | AC | 15 ms
7,040 KB |
testcase_39 | AC | 15 ms
6,912 KB |
testcase_40 | AC | 17 ms
6,912 KB |
testcase_41 | AC | 13 ms
7,040 KB |
testcase_42 | AC | 18 ms
6,912 KB |
ソースコード
#include "bits/stdc++.h" using namespace std; #ifdef _DEBUG #include "dump.hpp" #else #define dump(...) #endif //#define int long long #define rep(i,a,b) for(int i=(a);i<(b);i++) #define rrep(i,a,b) for(int i=(b)-1;i>=(a);i--) #define all(c) begin(c),end(c) const int INF = sizeof(int) == sizeof(long long) ? 0x3f3f3f3f3f3f3f3fLL : 0x3f3f3f3f; const int MOD = 1'000'000'007; template<class T> bool chmax(T &a, const T &b) { if (a < b) { a = b; return true; } return false; } template<class T> bool chmin(T &a, const T &b) { if (b < a) { a = b; return true; } return false; } template<int MOD> struct ModInt { static const int kMod = MOD; unsigned x; ModInt() :x(0) {} ModInt(signed x_) { x_ %= MOD; if (x_ < 0)x_ += MOD; x = x_; } ModInt(signed long long x_) { x_ %= MOD; if (x_ < 0)x_ += MOD; x = x_; } int get()const { return (int)x; } ModInt &operator+=(ModInt m) { if ((x += m.x) >= MOD)x -= MOD; return *this; } ModInt &operator-=(ModInt m) { if ((x += MOD - m.x) >= MOD)x -= MOD; return *this; } ModInt &operator*=(ModInt m) { x = (unsigned long long)x*m.x%MOD; return *this; } ModInt &operator/=(ModInt m) { return *this *= m.inverse(); } ModInt operator+(ModInt m)const { return ModInt(*this) += m; } ModInt operator-(ModInt m)const { return ModInt(*this) -= m; } ModInt operator*(ModInt m)const { return ModInt(*this) *= m; } ModInt operator/(ModInt m)const { return ModInt(*this) /= m; } ModInt operator-()const { return ModInt(kMod - x); } bool operator==(ModInt m)const { return x == m.x; } bool operator!=(ModInt m)const { return x != m.x; } ModInt inverse()const { signed a = x, b = MOD, u = 1, v = 0; while (b) { signed t = a / b; a -= t * b; swap(a, b); u -= t * v; swap(u, v); } if (u < 0)u += MOD; return ModInt(u); } }; template<int MOD> ostream &operator<<(ostream &os, const ModInt<MOD> &m) { return os << m.x; } template<int MOD> istream &operator>>(istream &is, ModInt<MOD> &m) { signed long long s; is >> s; m = ModInt<MOD>(s); return is; }; using mint = ModInt<MOD>; template<int MOD> ModInt<MOD> pow(ModInt<MOD> a, unsigned long long k) { ModInt<MOD> r = 1; while (k) { if (k & 1)r *= a; a *= a; k >>= 1; } return r; } // n < 10^7 // 前計算 O(n) // 計算 O(1) vector<mint> fact, factinv; void precomputeFact(int n) { n = min(n, mint::kMod - 1); // N >= kMod => N! = 0 (mod kMod) fact.resize(n + 1); factinv.resize(n + 1); fact[0] = 1; for (int i = 1; i < n + 1; i++) fact[i] = fact[i - 1] * i; factinv[n] = fact[n].inverse(); for (int i = n; i >= 1; i--) factinv[i - 1] = factinv[i] * i; // ((i-1)!)^(-1) = (i!)^(-1) * i } mint binom(int n, int r) { if (n >= mint::kMod) return binom(n % mint::kMod, r % mint::kMod) * binom(n / mint::kMod, r / mint::kMod); return r > n ? 0 : fact[n] * factinv[n - r] * factinv[r]; } // スターリング数 vector<vector<mint>> stirlingNumbers(int n) { vector<vector<mint>> S(n + 1, vector<mint>(n + 1, 0)); S[0][0] = 1; for (int i = 0; i < n; i++) { for (int j = 0; j <= i; j++) { S[i + 1][j] += S[i][j] * j; S[i + 1][j + 1] += S[i][j]; } } return S; } signed main() { cin.tie(0); ios::sync_with_stdio(false); int N, M; cin >> N >> M; vector<int> w(N); rep(i, 0, N) { cin >> w[i]; } vector<int> I(M), J(M); rep(i, 0, M) { cin >> I[i] >> J[i]; I[i]--, J[i]--; } vector<vector<int>> wf(N, vector<int>(N, 0)); rep(i, 0, N)wf[i][i] = w[i]; rep(i, 0, M) { int s = I[i], d = J[i]; wf[s][d] = max(wf[s][d], w[s]); // 有向 } rep(k, 0, N)rep(i, 0, N)rep(j, 0, N) { if (wf[i][k] != INF && wf[k][j] != INF) wf[i][j] = max(wf[i][j], min(wf[i][k], wf[k][j])); } dump(wf); int maxi = *max_element(all(w)); precomputeFact(maxi); auto S = stirlingNumbers(maxi); mint ans = 0; rep(i, 0, N)rep(j, 0, N) { if (wf[i][j] >= w[j]) { mint s = fact[w[j]] * S[w[i]][w[j]]; dump(i, j, s); ans += s; } } cout << ans << endl; return 0; }