ACM STEP 1.1.5A+B for Input-Output Practice (V)

#include <iostream>using namespace std;int main(int argc, const char * argv[]){    int a,b,sum,n;    cin >>n;    sum=0;    while(n--)    {        cin >>b;        while(b--)        {        cin >>a;        sum+=a;        }         cout <<sum<<endl;        sum=0;    }                return 0;}