| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 19313 |
2016-02-24T09:26:42 Z |
imsifile |
Σ (kriii4_P2) |
C++ |
|
8 ms |
1084 KB |
#include<stdio.h>
#define mod 1000000007
typedef long long lld;
lld a, b, sum;
lld exp(lld a, lld b){
if(b==0)return 1;
lld k=exp(a, b/2);
k=(k*k)%mod;
if(b%2)k=(k*a)%mod;
return k;
}
int main(){
int n, i;
scanf("%d", &n);
for(i=0; i<n; i++){
scanf("%lld%lld", &a, &b), a=exp(a,mod-2);
sum = (sum + a*b)%mod;
}
printf("%lld", sum);
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 2 |
Correct |
6 ms |
1084 KB |
Output is correct |
| 3 |
Correct |
8 ms |
1084 KB |
Output is correct |
| 4 |
Correct |
6 ms |
1084 KB |
Output is correct |
| 5 |
Correct |
8 ms |
1084 KB |
Output is correct |
| 6 |
Correct |
7 ms |
1084 KB |
Output is correct |
| 7 |
Correct |
7 ms |
1084 KB |
Output is correct |
| 8 |
Correct |
8 ms |
1084 KB |
Output is correct |
| 9 |
Correct |
8 ms |
1084 KB |
Output is correct |
| 10 |
Correct |
8 ms |
1084 KB |
Output is correct |
| 11 |
Correct |
2 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 |
5 ms |
1084 KB |
Output is correct |
| 15 |
Correct |
7 ms |
1084 KB |
Output is correct |
| 16 |
Correct |
8 ms |
1084 KB |
Output is correct |
| 17 |
Correct |
5 ms |
1084 KB |
Output is correct |
| 18 |
Correct |
0 ms |
1084 KB |
Output is correct |
| 19 |
Correct |
7 ms |
1084 KB |
Output is correct |
| 20 |
Correct |
2 ms |
1084 KB |
Output is correct |
