#include <bits/stdc++.h>
using namespace std;
long long dp[3009][3009], mod = 1000000007;
long long solve(long long N, long long K) {
for (int i = 0; i <= N; i++) { for (int j = 0; j <= N; j++) dp[i][j] = 0; }
dp[0][0] = 1;
for (int i = 0; i < N; i++) {
for (int j = 0; j < N; j++) {
dp[i + 1][j] += 1LL * (1LL + j) * dp[i][j]; dp[i + 1][j] %= mod;
dp[i + 1][j + 1] += 1LL * (i - j) * dp[i][j]; dp[i + 1][j + 1] %= mod;
}
}
return dp[N][K - 1];
}
int main() {
long long A, B; cin >> A >> B;
cout << solve(A, B) << endl;
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
512 KB |
Output is correct |
| 2 |
Correct |
2 ms |
384 KB |
Output is correct |
| 3 |
Correct |
2 ms |
384 KB |
Output is correct |
| 4 |
Correct |
2 ms |
512 KB |
Output is correct |
| 5 |
Correct |
2 ms |
384 KB |
Output is correct |
| 6 |
Correct |
2 ms |
384 KB |
Output is correct |
| 7 |
Correct |
3 ms |
384 KB |
Output is correct |
| 8 |
Correct |
2 ms |
384 KB |
Output is correct |
| 9 |
Correct |
2 ms |
384 KB |
Output is correct |
| 10 |
Correct |
2 ms |
384 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
512 KB |
Output is correct |
| 2 |
Correct |
2 ms |
384 KB |
Output is correct |
| 3 |
Correct |
2 ms |
384 KB |
Output is correct |
| 4 |
Correct |
2 ms |
512 KB |
Output is correct |
| 5 |
Correct |
2 ms |
384 KB |
Output is correct |
| 6 |
Correct |
2 ms |
384 KB |
Output is correct |
| 7 |
Correct |
3 ms |
384 KB |
Output is correct |
| 8 |
Correct |
2 ms |
384 KB |
Output is correct |
| 9 |
Correct |
2 ms |
384 KB |
Output is correct |
| 10 |
Correct |
2 ms |
384 KB |
Output is correct |
| 11 |
Correct |
3 ms |
844 KB |
Output is correct |
| 12 |
Correct |
5 ms |
2304 KB |
Output is correct |
| 13 |
Correct |
6 ms |
2304 KB |
Output is correct |
| 14 |
Correct |
7 ms |
2304 KB |
Output is correct |
| 15 |
Correct |
7 ms |
2304 KB |
Output is correct |
| 16 |
Correct |
5 ms |
2304 KB |
Output is correct |
| 17 |
Correct |
4 ms |
1408 KB |
Output is correct |
| 18 |
Correct |
5 ms |
1792 KB |
Output is correct |
| 19 |
Correct |
4 ms |
1024 KB |
Output is correct |
| 20 |
Correct |
2 ms |
384 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
512 KB |
Output is correct |
| 2 |
Correct |
2 ms |
384 KB |
Output is correct |
| 3 |
Correct |
2 ms |
384 KB |
Output is correct |
| 4 |
Correct |
2 ms |
512 KB |
Output is correct |
| 5 |
Correct |
2 ms |
384 KB |
Output is correct |
| 6 |
Correct |
2 ms |
384 KB |
Output is correct |
| 7 |
Correct |
3 ms |
384 KB |
Output is correct |
| 8 |
Correct |
2 ms |
384 KB |
Output is correct |
| 9 |
Correct |
2 ms |
384 KB |
Output is correct |
| 10 |
Correct |
2 ms |
384 KB |
Output is correct |
| 11 |
Correct |
3 ms |
844 KB |
Output is correct |
| 12 |
Correct |
5 ms |
2304 KB |
Output is correct |
| 13 |
Correct |
6 ms |
2304 KB |
Output is correct |
| 14 |
Correct |
7 ms |
2304 KB |
Output is correct |
| 15 |
Correct |
7 ms |
2304 KB |
Output is correct |
| 16 |
Correct |
5 ms |
2304 KB |
Output is correct |
| 17 |
Correct |
4 ms |
1408 KB |
Output is correct |
| 18 |
Correct |
5 ms |
1792 KB |
Output is correct |
| 19 |
Correct |
4 ms |
1024 KB |
Output is correct |
| 20 |
Correct |
2 ms |
384 KB |
Output is correct |
| 21 |
Correct |
36 ms |
12232 KB |
Output is correct |
| 22 |
Correct |
35 ms |
12280 KB |
Output is correct |
| 23 |
Correct |
33 ms |
12160 KB |
Output is correct |
| 24 |
Correct |
35 ms |
12228 KB |
Output is correct |
| 25 |
Correct |
39 ms |
12280 KB |
Output is correct |
| 26 |
Correct |
36 ms |
12160 KB |
Output is correct |
| 27 |
Correct |
36 ms |
12160 KB |
Output is correct |
| 28 |
Correct |
14 ms |
5632 KB |
Output is correct |
| 29 |
Correct |
4 ms |
1408 KB |
Output is correct |
| 30 |
Correct |
34 ms |
12160 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
512 KB |
Output is correct |
| 2 |
Correct |
2 ms |
384 KB |
Output is correct |
| 3 |
Correct |
2 ms |
384 KB |
Output is correct |
| 4 |
Correct |
2 ms |
512 KB |
Output is correct |
| 5 |
Correct |
2 ms |
384 KB |
Output is correct |
| 6 |
Correct |
2 ms |
384 KB |
Output is correct |
| 7 |
Correct |
3 ms |
384 KB |
Output is correct |
| 8 |
Correct |
2 ms |
384 KB |
Output is correct |
| 9 |
Correct |
2 ms |
384 KB |
Output is correct |
| 10 |
Correct |
2 ms |
384 KB |
Output is correct |
| 11 |
Correct |
3 ms |
844 KB |
Output is correct |
| 12 |
Correct |
5 ms |
2304 KB |
Output is correct |
| 13 |
Correct |
6 ms |
2304 KB |
Output is correct |
| 14 |
Correct |
7 ms |
2304 KB |
Output is correct |
| 15 |
Correct |
7 ms |
2304 KB |
Output is correct |
| 16 |
Correct |
5 ms |
2304 KB |
Output is correct |
| 17 |
Correct |
4 ms |
1408 KB |
Output is correct |
| 18 |
Correct |
5 ms |
1792 KB |
Output is correct |
| 19 |
Correct |
4 ms |
1024 KB |
Output is correct |
| 20 |
Correct |
2 ms |
384 KB |
Output is correct |
| 21 |
Correct |
36 ms |
12232 KB |
Output is correct |
| 22 |
Correct |
35 ms |
12280 KB |
Output is correct |
| 23 |
Correct |
33 ms |
12160 KB |
Output is correct |
| 24 |
Correct |
35 ms |
12228 KB |
Output is correct |
| 25 |
Correct |
39 ms |
12280 KB |
Output is correct |
| 26 |
Correct |
36 ms |
12160 KB |
Output is correct |
| 27 |
Correct |
36 ms |
12160 KB |
Output is correct |
| 28 |
Correct |
14 ms |
5632 KB |
Output is correct |
| 29 |
Correct |
4 ms |
1408 KB |
Output is correct |
| 30 |
Correct |
34 ms |
12160 KB |
Output is correct |
| 31 |
Runtime error |
302 ms |
142256 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 32 |
Halted |
0 ms |
0 KB |
- |
