結果
問題 | No.329 全射 |
ユーザー |
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提出日時 | 2015-12-22 00:29:47 |
言語 | C++11(廃止可能性あり) (gcc 13.3.0) |
結果 |
AC
|
実行時間 | 25 ms / 2,000 ms |
コード長 | 2,815 bytes |
コンパイル時間 | 781 ms |
コンパイル使用メモリ | 89,228 KB |
実行使用メモリ | 7,956 KB |
最終ジャッジ日時 | 2024-09-18 18:13:41 |
合計ジャッジ時間 | 2,884 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 40 |
コンパイルメッセージ
main.cpp: In function ‘int main()’: main.cpp:74:30: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 74 | scanf("%d", &w[i]); | ~~~~~^~~~~~~~~~~~~ main.cpp:78:30: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 78 | scanf("%d%d", &a, &b), -- a, -- b; | ~~~~~^~~~~~~~~~~~~~~~
ソースコード
#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>#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 0x3f3f3f3f3f3f3f3fLLusing namespace std;typedef vector<int> vi; typedef pair<int, int> pii; typedef vector<pair<int, int> > vpii; typedef long long ll;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) const { return ModInt(*this) += that; }ModInt operator-(ModInt that) const { return ModInt(*this) -= that; }ModInt operator*(ModInt that) const { return ModInt(*this) *= that; }};typedef ModInt<1000000007> mint;const int MaxN = 1000;mint dp[MaxN + 1][MaxN + 1];void precompute() {dp[0][0] = 1;for(int n = 1; n <= MaxN; ++ n)for(int k = 1; k <= n; ++ k)dp[n][k] = dp[n - 1][k] * k + dp[n - 1][k - 1] * k;}int main() {precompute();int N; int M;while(~scanf("%d%d", &N, &M)) {vector<int> w(N);for(int i = 0; i < N; ++ i)scanf("%d", &w[i]);vector<vi> ig(N);rep(i, M) {int a; int b;scanf("%d%d", &a, &b), -- a, -- b;ig[b].push_back(a);}mint ans;rep(i, N) {vector<bool> vis(N);vi stk;stk.push_back(i);while(!stk.empty()) {int j = stk.back(); stk.pop_back();if(vis[j]) continue;vis[j] = true;ans += dp[w[j]][w[i]];for(int k : ig[j]) if(w[i] <= w[k])stk.push_back(k);}}printf("%d\n", ans.get());}return 0;}