#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
const ll MOD = 1e9 + 7;
ll dp[3001][3001];
int main() {
cin.tie(0)->sync_with_stdio(0);
int n, k;
cin >> n >> k;
dp[1][1] = 1;
for (int i = 2; i <= n; i++) for (int j = 1; j <= i; j++)
dp[i][j] = (dp[i - 1][j] * j + dp[i - 1][j - 1] * (i - j + 1)) % MOD;
cout << dp[n][k];
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
1 ms |
384 KB |
Output is correct |
3 |
Correct |
1 ms |
364 KB |
Output is correct |
4 |
Correct |
1 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
1 ms |
364 KB |
Output is correct |
7 |
Correct |
1 ms |
364 KB |
Output is correct |
8 |
Correct |
1 ms |
364 KB |
Output is correct |
9 |
Correct |
1 ms |
364 KB |
Output is correct |
10 |
Correct |
1 ms |
364 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
1 ms |
384 KB |
Output is correct |
3 |
Correct |
1 ms |
364 KB |
Output is correct |
4 |
Correct |
1 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
1 ms |
364 KB |
Output is correct |
7 |
Correct |
1 ms |
364 KB |
Output is correct |
8 |
Correct |
1 ms |
364 KB |
Output is correct |
9 |
Correct |
1 ms |
364 KB |
Output is correct |
10 |
Correct |
1 ms |
364 KB |
Output is correct |
11 |
Correct |
1 ms |
748 KB |
Output is correct |
12 |
Correct |
2 ms |
1900 KB |
Output is correct |
13 |
Correct |
1 ms |
1900 KB |
Output is correct |
14 |
Correct |
1 ms |
1900 KB |
Output is correct |
15 |
Correct |
2 ms |
1920 KB |
Output is correct |
16 |
Correct |
1 ms |
1900 KB |
Output is correct |
17 |
Correct |
1 ms |
1260 KB |
Output is correct |
18 |
Correct |
2 ms |
1644 KB |
Output is correct |
19 |
Correct |
1 ms |
912 KB |
Output is correct |
20 |
Correct |
1 ms |
364 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
1 ms |
384 KB |
Output is correct |
3 |
Correct |
1 ms |
364 KB |
Output is correct |
4 |
Correct |
1 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
1 ms |
364 KB |
Output is correct |
7 |
Correct |
1 ms |
364 KB |
Output is correct |
8 |
Correct |
1 ms |
364 KB |
Output is correct |
9 |
Correct |
1 ms |
364 KB |
Output is correct |
10 |
Correct |
1 ms |
364 KB |
Output is correct |
11 |
Correct |
1 ms |
748 KB |
Output is correct |
12 |
Correct |
2 ms |
1900 KB |
Output is correct |
13 |
Correct |
1 ms |
1900 KB |
Output is correct |
14 |
Correct |
1 ms |
1900 KB |
Output is correct |
15 |
Correct |
2 ms |
1920 KB |
Output is correct |
16 |
Correct |
1 ms |
1900 KB |
Output is correct |
17 |
Correct |
1 ms |
1260 KB |
Output is correct |
18 |
Correct |
2 ms |
1644 KB |
Output is correct |
19 |
Correct |
1 ms |
912 KB |
Output is correct |
20 |
Correct |
1 ms |
364 KB |
Output is correct |
21 |
Correct |
6 ms |
8300 KB |
Output is correct |
22 |
Correct |
6 ms |
8300 KB |
Output is correct |
23 |
Correct |
6 ms |
8428 KB |
Output is correct |
24 |
Correct |
6 ms |
8172 KB |
Output is correct |
25 |
Correct |
6 ms |
8300 KB |
Output is correct |
26 |
Correct |
7 ms |
8300 KB |
Output is correct |
27 |
Correct |
7 ms |
8300 KB |
Output is correct |
28 |
Correct |
4 ms |
4204 KB |
Output is correct |
29 |
Correct |
1 ms |
1260 KB |
Output is correct |
30 |
Correct |
6 ms |
8172 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
1 ms |
384 KB |
Output is correct |
3 |
Correct |
1 ms |
364 KB |
Output is correct |
4 |
Correct |
1 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
1 ms |
364 KB |
Output is correct |
7 |
Correct |
1 ms |
364 KB |
Output is correct |
8 |
Correct |
1 ms |
364 KB |
Output is correct |
9 |
Correct |
1 ms |
364 KB |
Output is correct |
10 |
Correct |
1 ms |
364 KB |
Output is correct |
11 |
Correct |
1 ms |
748 KB |
Output is correct |
12 |
Correct |
2 ms |
1900 KB |
Output is correct |
13 |
Correct |
1 ms |
1900 KB |
Output is correct |
14 |
Correct |
1 ms |
1900 KB |
Output is correct |
15 |
Correct |
2 ms |
1920 KB |
Output is correct |
16 |
Correct |
1 ms |
1900 KB |
Output is correct |
17 |
Correct |
1 ms |
1260 KB |
Output is correct |
18 |
Correct |
2 ms |
1644 KB |
Output is correct |
19 |
Correct |
1 ms |
912 KB |
Output is correct |
20 |
Correct |
1 ms |
364 KB |
Output is correct |
21 |
Correct |
6 ms |
8300 KB |
Output is correct |
22 |
Correct |
6 ms |
8300 KB |
Output is correct |
23 |
Correct |
6 ms |
8428 KB |
Output is correct |
24 |
Correct |
6 ms |
8172 KB |
Output is correct |
25 |
Correct |
6 ms |
8300 KB |
Output is correct |
26 |
Correct |
7 ms |
8300 KB |
Output is correct |
27 |
Correct |
7 ms |
8300 KB |
Output is correct |
28 |
Correct |
4 ms |
4204 KB |
Output is correct |
29 |
Correct |
1 ms |
1260 KB |
Output is correct |
30 |
Correct |
6 ms |
8172 KB |
Output is correct |
31 |
Runtime error |
126 ms |
94888 KB |
Execution killed with signal 11 |
32 |
Halted |
0 ms |
0 KB |
- |