Submission #19585

# Submission time Handle Problem Language Result Execution time Memory
19585 2016-02-24T21:27:05 Z gs12117 Σ (kriii4_P2) C++
0 / 100
15 ms 1084 KB
#include<stdio.h>
int mod=1000000007;
long long int f(long long int x,long long int y){
	if(y==0)return 1;
	long long int r=f(x,y/2);
	r*=r;
	r%=mod;
	if(y%2==0)return r;
	r*=x;
	r%=mod;
	return r;
}
int main(){
	int n,i,a,b;
	long long int res=0;
	scanf("%d",&n);
	for(i=0;i<n;i++){
		scanf("%d%d",&a,&b);
		res+=b*f(a,mod-2)%mod;
	}
	printf("%lld\n",res);
}
# Verdict Execution time Memory Grader output
1 Incorrect 15 ms 1084 KB Output isn't correct
2 Halted 0 ms 0 KB -