| # |
제출 시각 |
아이디 |
문제 |
언어 |
결과 |
실행 시간 |
메모리 |
| 21420 |
2017-04-13T19:34:50 Z |
gs14004 |
순열 (kriii4_T) |
C++11 |
|
203 ms |
2020 KB |
#include <bits/stdc++.h>
using namespace std;
typedef long long lint;
typedef long double llf;
typedef pair<int, int> pi;
const int mod = 1e9 + 7;
lint ipow(lint x, lint p){
lint ret = 1, piv = x % mod;
while(p){
if(p&1) ret *= piv;
piv *= piv;
ret %= mod;
piv %= mod;
p >>= 1;
}
return ret % mod;
}
int n, k;
int main(){
cin >> n >> k;
lint ans = 0;
for(int i=k+1; i<=n; i++){
ans += (n - i + 1) * ipow(i+1, mod - 2) % mod;
ans %= mod;
}
for(int i=2; i<=n+1; i++) ans = (ans * i) % mod;
cout << ans;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 2 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 3 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 4 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 5 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 6 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 7 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 8 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 9 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 10 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 11 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 12 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 13 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 14 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 15 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 16 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 17 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 18 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 19 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 20 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 21 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 22 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 23 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 24 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 25 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 26 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 27 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 28 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 29 |
Correct |
0 ms |
2020 KB |
Output is correct |
| 30 |
Correct |
0 ms |
2020 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
203 ms |
2020 KB |
Output is correct |
| 2 |
Correct |
66 ms |
2020 KB |
Output is correct |
| 3 |
Correct |
26 ms |
2020 KB |
Output is correct |
| 4 |
Correct |
16 ms |
2020 KB |
Output is correct |
| 5 |
Correct |
23 ms |
2020 KB |
Output is correct |
| 6 |
Correct |
19 ms |
2020 KB |
Output is correct |
| 7 |
Correct |
149 ms |
2020 KB |
Output is correct |
| 8 |
Correct |
86 ms |
2020 KB |
Output is correct |
| 9 |
Correct |
29 ms |
2020 KB |
Output is correct |
| 10 |
Correct |
3 ms |
2020 KB |
Output is correct |
| 11 |
Correct |
59 ms |
2020 KB |
Output is correct |
| 12 |
Correct |
6 ms |
2020 KB |
Output is correct |
| 13 |
Correct |
29 ms |
2020 KB |
Output is correct |
| 14 |
Correct |
149 ms |
2020 KB |
Output is correct |
| 15 |
Correct |
103 ms |
2020 KB |
Output is correct |
| 16 |
Correct |
116 ms |
2020 KB |
Output is correct |
| 17 |
Correct |
56 ms |
2020 KB |
Output is correct |
| 18 |
Correct |
73 ms |
2020 KB |
Output is correct |
| 19 |
Correct |
9 ms |
2020 KB |
Output is correct |
| 20 |
Correct |
79 ms |
2020 KB |
Output is correct |
| 21 |
Correct |
46 ms |
2020 KB |
Output is correct |
| 22 |
Correct |
109 ms |
2020 KB |
Output is correct |
| 23 |
Correct |
59 ms |
2020 KB |
Output is correct |
| 24 |
Correct |
19 ms |
2020 KB |
Output is correct |
| 25 |
Correct |
23 ms |
2020 KB |
Output is correct |
| 26 |
Correct |
76 ms |
2020 KB |
Output is correct |
| 27 |
Correct |
6 ms |
2020 KB |
Output is correct |
| 28 |
Correct |
6 ms |
2020 KB |
Output is correct |
| 29 |
Correct |
203 ms |
2020 KB |
Output is correct |
| 30 |
Correct |
203 ms |
2020 KB |
Output is correct |
