제출 #1247835

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1247835		shiori_chan	마스코트 (JOI13_mascots)	C++20	0 / 100	78 ms	70780 KiB

mascots

#include <iostream>
#include <bits/stdc++.h>
#include <vector>
#include <random>
#include <algorithm>
#include <chrono>
#define all(x) x.begin(), x.end()
#define fi first
#define se second 
#define compact(v) v.erase(unique(all(v)) , v.end())
#define pi pair<int , int>
#define vi vector<int>
#define FOR(i , l , r) for(int i = l; i <= r; ++ i)

using namespace std;
typedef long long ll;
#define int long long

const int nd = 3001 , mod = 1e9 + 7;
int mul(int a , int b) {return (a * b) % mod;}
int add(int a , int b) {return (a + b) % mod;}

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
uniform_int_distribution<int> dist(1 , (int)2e9);

int f[nd * 3000];	
int dp[nd][nd];

void solve(){
	int r , c; cin >> r >> c;

	int n; cin >> n;
	int cnt = 0;
	pair<int , int> s = {INT_MAX , INT_MAX} , t = {-1 , -1};
	
	FOR(i , 1 , n){
		int x , y; cin >> x >> y;
		s = min(s , {x , y}) , t = max(t , {x , y});
		++ cnt;
	}

	int x = t.fi - s.fi + 1 , y = t.se - s.se + 1;
	dp[x][y] = f[x * y - cnt];

	FOR(i , x , r){
		FOR(j , y , c){
			if(i == x && j == y) continue;
			dp[i][j] = add(mul(dp[i - 1][j] , f[j]) , mul(dp[i][j - 1] , f[i]));
			//cout << i << " " << j << " " << dp[i][j] << '\n';
		}
	}

	cout << mul(2 , dp[r][c]) << '\n';
}

signed main() {
   ios_base::sync_with_stdio(false);
   cin.tie(0);

	#define task "task" 
	if(fopen(task".inp", "r")) {
		freopen(task".inp", "r", stdin);
		freopen(task".out", "w", stdout);
	}

	f[0] = 1;
	for(int i = 1;i < nd * 3000; ++ i) f[i] = mul(i , f[i - 1]);
	solve();

	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

mascots.cpp: In function 'int main()':
mascots.cpp:62:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |                 freopen(task".inp", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
mascots.cpp:63:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |                 freopen(task".out", "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 30
• Subtask 3: 0 / 60