#include <bits/stdc++.h>
long long dp[3005][3005],n,m,i,j;int main(){std::cin>>n>>m;for(i=0;i<=3000;++i)dp[i][0]=dp[0][i]=1;for(i=1;i<=n;++i)for(j=1;j<=m;++j)dp[i][j]=(dp[i-1][j]+(j>=2?j*(j-1)/2*dp[i-1][j-2]:0)+4*j*dp[i-1][j-1]+(i>=2?dp[i-2][j-1]*j*(i-1):0))%1000000007;std::cout<<dp[n][m]-1;}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
10 ms |
12408 KB |
Output is correct |
| 2 |
Correct |
10 ms |
12408 KB |
Output is correct |
| 3 |
Correct |
10 ms |
12408 KB |
Output is correct |
| 4 |
Correct |
10 ms |
12408 KB |
Output is correct |
| 5 |
Correct |
11 ms |
12536 KB |
Output is correct |
| 6 |
Correct |
10 ms |
12664 KB |
Output is correct |
| 7 |
Correct |
10 ms |
12664 KB |
Output is correct |
| 8 |
Correct |
10 ms |
12536 KB |
Output is correct |
| 9 |
Correct |
10 ms |
12536 KB |
Output is correct |
| 10 |
Correct |
11 ms |
12792 KB |
Output is correct |
| 11 |
Correct |
10 ms |
12536 KB |
Output is correct |
| 12 |
Correct |
11 ms |
13176 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
10 ms |
12408 KB |
Output is correct |
| 2 |
Correct |
10 ms |
12408 KB |
Output is correct |
| 3 |
Correct |
10 ms |
12408 KB |
Output is correct |
| 4 |
Correct |
10 ms |
12408 KB |
Output is correct |
| 5 |
Correct |
11 ms |
12536 KB |
Output is correct |
| 6 |
Correct |
10 ms |
12664 KB |
Output is correct |
| 7 |
Correct |
10 ms |
12664 KB |
Output is correct |
| 8 |
Correct |
10 ms |
12536 KB |
Output is correct |
| 9 |
Correct |
10 ms |
12536 KB |
Output is correct |
| 10 |
Correct |
11 ms |
12792 KB |
Output is correct |
| 11 |
Correct |
10 ms |
12536 KB |
Output is correct |
| 12 |
Correct |
11 ms |
13176 KB |
Output is correct |
| 13 |
Correct |
13 ms |
12536 KB |
Output is correct |
| 14 |
Correct |
10 ms |
12536 KB |
Output is correct |
| 15 |
Correct |
51 ms |
56184 KB |
Output is correct |
| 16 |
Correct |
13 ms |
15352 KB |
Output is correct |
| 17 |
Correct |
16 ms |
22264 KB |
Output is correct |
| 18 |
Correct |
21 ms |
24568 KB |
Output is correct |
| 19 |
Correct |
56 ms |
63352 KB |
Output is correct |
| 20 |
Correct |
53 ms |
53112 KB |
Output is correct |
| 21 |
Correct |
35 ms |
39292 KB |
Output is correct |
| 22 |
Correct |
36 ms |
38904 KB |
Output is correct |
| 23 |
Correct |
23 ms |
27128 KB |
Output is correct |
| 24 |
Correct |
71 ms |
71032 KB |
Output is correct |
| 25 |
Correct |
57 ms |
62972 KB |
Output is correct |
| 26 |
Correct |
61 ms |
67320 KB |
Output is correct |
| 27 |
Correct |
65 ms |
69372 KB |
Output is correct |
