Submission #1109770

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1109770	2024-11-07T14:17:30 Z	ttamx	Tents (JOI18_tents)	C++17	100 / 100	95 ms	70984 KB

tents

#include<bits/stdc++.h>

using namespace std;

using ll = long long;

const int N=3005;
const int MOD=1e9+7;

int h,w;
ll dp[N][N];

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    cin >> h >> w;
    for(int i=0;i<=h;i++){
        dp[i][0]=1;
    }
    for(int i=0;i<=w;i++){
        dp[0][i]=1;
    }
    for(int i=1;i<=h;i++){
        for(int j=1;j<=w;j++){
            dp[i][j]+=dp[i-1][j];
            dp[i][j]%=MOD;
            dp[i][j]+=dp[i-1][j-1]*j*4;
            dp[i][j]%=MOD;
            if(i>=2){
                dp[i][j]+=dp[i-2][j-1]*(i-1)*j%MOD;
                dp[i][j]%=MOD;
            }
            if(j>=2){
                dp[i][j]+=dp[i-1][j-2]*(1LL*j*(j-1)/2)%MOD;
                dp[i][j]%=MOD;
            }
        }
    }
    cout << (dp[h][w]-1+MOD)%MOD;
}

Subtask #1

48.0 / 48.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	336 KB	Output is correct
2	Correct	1 ms	336 KB	Output is correct
3	Correct	1 ms	2384 KB	Output is correct
4	Correct	1 ms	6480 KB	Output is correct
5	Correct	1 ms	2516 KB	Output is correct
6	Correct	1 ms	6480 KB	Output is correct
7	Correct	1 ms	2384 KB	Output is correct
8	Correct	1 ms	6480 KB	Output is correct
9	Correct	1 ms	4432 KB	Output is correct
10	Correct	2 ms	8712 KB	Output is correct
11	Correct	1 ms	2384 KB	Output is correct
12	Correct	3 ms	8696 KB	Output is correct

Subtask #2

52.0 / 52.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	336 KB	Output is correct
2	Correct	1 ms	336 KB	Output is correct
3	Correct	1 ms	2384 KB	Output is correct
4	Correct	1 ms	6480 KB	Output is correct
5	Correct	1 ms	2516 KB	Output is correct
6	Correct	1 ms	6480 KB	Output is correct
7	Correct	1 ms	2384 KB	Output is correct
8	Correct	1 ms	6480 KB	Output is correct
9	Correct	1 ms	4432 KB	Output is correct
10	Correct	2 ms	8712 KB	Output is correct
11	Correct	1 ms	2384 KB	Output is correct
12	Correct	3 ms	8696 KB	Output is correct
13	Correct	1 ms	336 KB	Output is correct
14	Correct	6 ms	55888 KB	Output is correct
15	Correct	67 ms	66128 KB	Output is correct
16	Correct	6 ms	6736 KB	Output is correct
17	Correct	18 ms	16976 KB	Output is correct
18	Correct	20 ms	29264 KB	Output is correct
19	Correct	74 ms	70228 KB	Output is correct
20	Correct	59 ms	57936 KB	Output is correct
21	Correct	39 ms	39504 KB	Output is correct
22	Correct	41 ms	51792 KB	Output is correct
23	Correct	26 ms	70480 KB	Output is correct
24	Correct	95 ms	70984 KB	Output is correct
25	Correct	73 ms	62032 KB	Output is correct
26	Correct	85 ms	68176 KB	Output is correct
27	Correct	90 ms	70224 KB	Output is correct