#include <bits/stdc++.h>
#define ff first
#define ss second
#define endl '\n'
using namespace std;
const long long INF = (long long) 1e18;
const int mod = (int) 1e9+7;
const int MAXN = (int) 3e3+5;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
ll n, k;
ll dp[MAXN][MAXN];
int main(){
ios_base::sync_with_stdio(false);
cin.tie(nullptr);cout.tie(nullptr);
#ifdef Local
freopen("C:/Users/Admin/Desktop/Yazilim/C/IO/int.txt","r",stdin);
freopen("C:/Users/Admin/Desktop/Yazilim/C/IO/out.txt","w",stdout);
#endif
cin>>n>>k;
dp[1][0] = 1;
for(int i = 2; i <= n; i++){
dp[i][0] = 1;
for(int j = 1; j < k; j++){
dp[i][j] = ((i - j)*dp[i - 1][j - 1] + dp[i - 1][j]*(j + 1))%mod;
}
}
cout<<dp[n][k - 1]<<endl;
#ifdef Local
cout<<endl<<fixed<<setprecision(2)<<1000.0 * clock() / CLOCKS_PER_SEC<< " milliseconds ";
#endif
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
380 KB |
Output is correct |
2 |
Correct |
5 ms |
376 KB |
Output is correct |
3 |
Correct |
5 ms |
376 KB |
Output is correct |
4 |
Correct |
5 ms |
376 KB |
Output is correct |
5 |
Correct |
5 ms |
376 KB |
Output is correct |
6 |
Correct |
5 ms |
376 KB |
Output is correct |
7 |
Correct |
5 ms |
376 KB |
Output is correct |
8 |
Correct |
5 ms |
376 KB |
Output is correct |
9 |
Correct |
5 ms |
376 KB |
Output is correct |
10 |
Correct |
5 ms |
376 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
380 KB |
Output is correct |
2 |
Correct |
5 ms |
376 KB |
Output is correct |
3 |
Correct |
5 ms |
376 KB |
Output is correct |
4 |
Correct |
5 ms |
376 KB |
Output is correct |
5 |
Correct |
5 ms |
376 KB |
Output is correct |
6 |
Correct |
5 ms |
376 KB |
Output is correct |
7 |
Correct |
5 ms |
376 KB |
Output is correct |
8 |
Correct |
5 ms |
376 KB |
Output is correct |
9 |
Correct |
5 ms |
376 KB |
Output is correct |
10 |
Correct |
5 ms |
376 KB |
Output is correct |
11 |
Correct |
5 ms |
760 KB |
Output is correct |
12 |
Correct |
5 ms |
1528 KB |
Output is correct |
13 |
Correct |
5 ms |
1528 KB |
Output is correct |
14 |
Correct |
5 ms |
1784 KB |
Output is correct |
15 |
Correct |
6 ms |
2168 KB |
Output is correct |
16 |
Correct |
7 ms |
2296 KB |
Output is correct |
17 |
Correct |
5 ms |
1144 KB |
Output is correct |
18 |
Correct |
5 ms |
1656 KB |
Output is correct |
19 |
Correct |
6 ms |
1016 KB |
Output is correct |
20 |
Correct |
5 ms |
376 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
380 KB |
Output is correct |
2 |
Correct |
5 ms |
376 KB |
Output is correct |
3 |
Correct |
5 ms |
376 KB |
Output is correct |
4 |
Correct |
5 ms |
376 KB |
Output is correct |
5 |
Correct |
5 ms |
376 KB |
Output is correct |
6 |
Correct |
5 ms |
376 KB |
Output is correct |
7 |
Correct |
5 ms |
376 KB |
Output is correct |
8 |
Correct |
5 ms |
376 KB |
Output is correct |
9 |
Correct |
5 ms |
376 KB |
Output is correct |
10 |
Correct |
5 ms |
376 KB |
Output is correct |
11 |
Correct |
5 ms |
760 KB |
Output is correct |
12 |
Correct |
5 ms |
1528 KB |
Output is correct |
13 |
Correct |
5 ms |
1528 KB |
Output is correct |
14 |
Correct |
5 ms |
1784 KB |
Output is correct |
15 |
Correct |
6 ms |
2168 KB |
Output is correct |
16 |
Correct |
7 ms |
2296 KB |
Output is correct |
17 |
Correct |
5 ms |
1144 KB |
Output is correct |
18 |
Correct |
5 ms |
1656 KB |
Output is correct |
19 |
Correct |
6 ms |
1016 KB |
Output is correct |
20 |
Correct |
5 ms |
376 KB |
Output is correct |
21 |
Correct |
6 ms |
4344 KB |
Output is correct |
22 |
Correct |
7 ms |
4344 KB |
Output is correct |
23 |
Correct |
9 ms |
7928 KB |
Output is correct |
24 |
Correct |
10 ms |
8312 KB |
Output is correct |
25 |
Correct |
13 ms |
11772 KB |
Output is correct |
26 |
Correct |
13 ms |
12152 KB |
Output is correct |
27 |
Correct |
14 ms |
12152 KB |
Output is correct |
28 |
Correct |
8 ms |
5368 KB |
Output is correct |
29 |
Correct |
5 ms |
1272 KB |
Output is correct |
30 |
Correct |
14 ms |
11896 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
380 KB |
Output is correct |
2 |
Correct |
5 ms |
376 KB |
Output is correct |
3 |
Correct |
5 ms |
376 KB |
Output is correct |
4 |
Correct |
5 ms |
376 KB |
Output is correct |
5 |
Correct |
5 ms |
376 KB |
Output is correct |
6 |
Correct |
5 ms |
376 KB |
Output is correct |
7 |
Correct |
5 ms |
376 KB |
Output is correct |
8 |
Correct |
5 ms |
376 KB |
Output is correct |
9 |
Correct |
5 ms |
376 KB |
Output is correct |
10 |
Correct |
5 ms |
376 KB |
Output is correct |
11 |
Correct |
5 ms |
760 KB |
Output is correct |
12 |
Correct |
5 ms |
1528 KB |
Output is correct |
13 |
Correct |
5 ms |
1528 KB |
Output is correct |
14 |
Correct |
5 ms |
1784 KB |
Output is correct |
15 |
Correct |
6 ms |
2168 KB |
Output is correct |
16 |
Correct |
7 ms |
2296 KB |
Output is correct |
17 |
Correct |
5 ms |
1144 KB |
Output is correct |
18 |
Correct |
5 ms |
1656 KB |
Output is correct |
19 |
Correct |
6 ms |
1016 KB |
Output is correct |
20 |
Correct |
5 ms |
376 KB |
Output is correct |
21 |
Correct |
6 ms |
4344 KB |
Output is correct |
22 |
Correct |
7 ms |
4344 KB |
Output is correct |
23 |
Correct |
9 ms |
7928 KB |
Output is correct |
24 |
Correct |
10 ms |
8312 KB |
Output is correct |
25 |
Correct |
13 ms |
11772 KB |
Output is correct |
26 |
Correct |
13 ms |
12152 KB |
Output is correct |
27 |
Correct |
14 ms |
12152 KB |
Output is correct |
28 |
Correct |
8 ms |
5368 KB |
Output is correct |
29 |
Correct |
5 ms |
1272 KB |
Output is correct |
30 |
Correct |
14 ms |
11896 KB |
Output is correct |
31 |
Runtime error |
50 ms |
25080 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
32 |
Halted |
0 ms |
0 KB |
- |