| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 19916 |
2016-02-25T07:04:46 Z |
xdoju |
순열 (kriii4_T) |
C++14 |
|
845 ms |
1084 KB |
#include <stdio.h>
const int MOD = 1000000007;
int mul(int x, int y){ return (long long)x * y % MOD; }
int power(int x, int y){
if(y == 0) return 1;
int r = power(x, y / 2);
r = mul(r, r);
if(y % 2 == 1) r = mul(r, x);
return r;
}
int modinv(int x){
return power(x, MOD - 2);
}
int main(){
int N, K; scanf("%d%d", &N, &K);
int v = 1;
for(int i = 1; i <= N + 1; i++) v = mul(v, i); // fac(N + 1)
v = mul(v, N + 1);
int ans = 0;
for(int k = 1; k <= N; k++){
v = mul(v, k);
v = mul(v, modinv(k + 1));
v = mul(v, N - k + 1);
v = mul(v, modinv(N - k + 2));
if(k >= K + 1) ans = (ans + v) % MOD;
}
printf("%d\n", ans);
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 2 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 3 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 4 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 5 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 6 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 7 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 8 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 9 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 10 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 11 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 12 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 13 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 14 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 15 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 16 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 17 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 18 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 19 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 20 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 21 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 22 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 23 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 24 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 25 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 26 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 27 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 28 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 29 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 30 |
Correct |
1 ms |
1084 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
843 ms |
1084 KB |
Output is correct |
| 2 |
Correct |
703 ms |
1084 KB |
Output is correct |
| 3 |
Correct |
714 ms |
1084 KB |
Output is correct |
| 4 |
Correct |
154 ms |
1084 KB |
Output is correct |
| 5 |
Correct |
161 ms |
1084 KB |
Output is correct |
| 6 |
Correct |
714 ms |
1084 KB |
Output is correct |
| 7 |
Correct |
779 ms |
1084 KB |
Output is correct |
| 8 |
Correct |
439 ms |
1084 KB |
Output is correct |
| 9 |
Correct |
201 ms |
1084 KB |
Output is correct |
| 10 |
Correct |
89 ms |
1084 KB |
Output is correct |
| 11 |
Correct |
260 ms |
1084 KB |
Output is correct |
| 12 |
Correct |
538 ms |
1084 KB |
Output is correct |
| 13 |
Correct |
678 ms |
1084 KB |
Output is correct |
| 14 |
Correct |
838 ms |
1084 KB |
Output is correct |
| 15 |
Correct |
484 ms |
1084 KB |
Output is correct |
| 16 |
Correct |
503 ms |
1084 KB |
Output is correct |
| 17 |
Correct |
543 ms |
1084 KB |
Output is correct |
| 18 |
Correct |
318 ms |
1084 KB |
Output is correct |
| 19 |
Correct |
294 ms |
1084 KB |
Output is correct |
| 20 |
Correct |
659 ms |
1084 KB |
Output is correct |
| 21 |
Correct |
219 ms |
1084 KB |
Output is correct |
| 22 |
Correct |
686 ms |
1084 KB |
Output is correct |
| 23 |
Correct |
573 ms |
1084 KB |
Output is correct |
| 24 |
Correct |
140 ms |
1084 KB |
Output is correct |
| 25 |
Correct |
734 ms |
1084 KB |
Output is correct |
| 26 |
Correct |
463 ms |
1084 KB |
Output is correct |
| 27 |
Correct |
214 ms |
1084 KB |
Output is correct |
| 28 |
Correct |
841 ms |
1084 KB |
Output is correct |
| 29 |
Correct |
845 ms |
1084 KB |
Output is correct |
| 30 |
Correct |
840 ms |
1084 KB |
Output is correct |
