Submission #995549

#	Time	Username	Problem	Language	Result	Execution time	Memory
995549		mariamp1	Tents (JOI18_tents)	C++14	100 / 100	50 ms	70788 KiB

tents

#include<bits/stdc++.h>
using namespace std;
#define int long long
const int N = 3005;
int dp[3005][3005];
const int mod = 1e9 + 7;
int32_t main(){
	int h, w; cin >> h >> w;
	int ans = 0;
	for(int i = 1; i <= h; i++){
		for(int j = 1; j <= w; j++){
			ans=0;
			ans += dp[i-1][j];
			if(j > 1){
				ans += (j * (j-1))/2 * (dp[i-1][j-2]+1);
			}
			ans += (dp[i-1][j-1]+1) * j * 4;
			if(i > 1){
				ans += (dp[i-2][j - 1] + 1) * (i-1) * (j);
			}

			ans %= mod;
			dp[i][j]=ans;
		}
	}
	cout << ans << endl;
}

• Subtask 1: 48 / 48
• Subtask 2: 52 / 52