Submission #484054

#	Time	Username	Problem	Language	Result	Execution time	Memory
484054		SirCovidThe19th	Tents (JOI18_tents)	C++17	100 / 100	73 ms	70732 KiB

tents

#include <bits/stdc++.h>
using namespace std;

int main(){
    int n, m; cin >> n >> m; long long dp[n + 1][m + 1] = {};
    for (int i = 1; i <= n; i++) for (int j = 1; j <= m; j++){
        dp[i][j] += dp[i - 1][j];
        dp[i][j] += (dp[i - 1][j - 1] + 1) * j * 4;
        if (j > 1) dp[i][j] += (dp[i - 1][j - 2] + 1) * j * (j - 1) / 2; 
        if (i > 1) dp[i][j] += (dp[i - 2][j - 1] + 1) * j * (i - 1); 
        dp[i][j] %= (int)1e9 + 7;
    }
    cout<<dp[n][m]<<endl;
}

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