답안 #19586

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
19586	2016-02-24T21:28:09 Z	gs12117	Σ (kriii4_P2)	C++	100 / 100	16 ms	1084 KB

P2

#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;
		res%=mod;
	}
	printf("%lld\n",res);
}

Subtask #1

100.0 / 100.0

#	결과	실행 시간	메모리	Grader output
1	Correct	15 ms	1084 KB	Output is correct
2	Correct	15 ms	1084 KB	Output is correct
3	Correct	13 ms	1084 KB	Output is correct
4	Correct	16 ms	1084 KB	Output is correct
5	Correct	15 ms	1084 KB	Output is correct
6	Correct	12 ms	1084 KB	Output is correct
7	Correct	11 ms	1084 KB	Output is correct
8	Correct	13 ms	1084 KB	Output is correct
9	Correct	15 ms	1084 KB	Output is correct
10	Correct	8 ms	1084 KB	Output is correct
11	Correct	14 ms	1084 KB	Output is correct
12	Correct	15 ms	1084 KB	Output is correct
13	Correct	14 ms	1084 KB	Output is correct
14	Correct	14 ms	1084 KB	Output is correct
15	Correct	14 ms	1084 KB	Output is correct
16	Correct	11 ms	1084 KB	Output is correct
17	Correct	16 ms	1084 KB	Output is correct
18	Correct	15 ms	1084 KB	Output is correct
19	Correct	14 ms	1084 KB	Output is correct
20	Correct	15 ms	1084 KB	Output is correct