Submission #19527

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
19527	2016-02-24T16:12:58 Z	Namnamseo	Σ (kriii4_P2)	C++14	100 / 100	25 ms	1716 KB

P2

#include <iostream>
using namespace std;
typedef long long ll;
int M=int(1e9)+7;
ll pow(ll a,ll b){
    if(b==0) return 1;
    ll ret=pow(a,b/2);
    ret=(ret*ret)%M;
    if(b&1) ret=(ret*a)%M;
    return ret;
}
int main()
{
    ll ret=0, tmp;
    int n;
    cin>>n;
    int a,b;
    for(;n--;){
        cin>>a>>b;
        tmp=b*pow(a,M-2)%M;
        ret=(ret+tmp)%M;
    }
    cout<<ret;
    return 0;
}

Subtask #1

100.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	24 ms	1716 KB	Output is correct
2	Correct	21 ms	1716 KB	Output is correct
3	Correct	24 ms	1716 KB	Output is correct
4	Correct	23 ms	1716 KB	Output is correct
5	Correct	21 ms	1716 KB	Output is correct
6	Correct	24 ms	1716 KB	Output is correct
7	Correct	19 ms	1716 KB	Output is correct
8	Correct	19 ms	1716 KB	Output is correct
9	Correct	22 ms	1716 KB	Output is correct
10	Correct	19 ms	1716 KB	Output is correct
11	Correct	24 ms	1716 KB	Output is correct
12	Correct	24 ms	1716 KB	Output is correct
13	Correct	22 ms	1716 KB	Output is correct
14	Correct	25 ms	1716 KB	Output is correct
15	Correct	23 ms	1716 KB	Output is correct
16	Correct	23 ms	1716 KB	Output is correct
17	Correct	22 ms	1716 KB	Output is correct
18	Correct	23 ms	1716 KB	Output is correct
19	Correct	23 ms	1716 KB	Output is correct
20	Correct	19 ms	1716 KB	Output is correct