problema 57

#include <fstream>
using namespace std;
ifstream fin("n_suma.in");
ofstream fout("n_suma.out");
int main()
{
    int n,a,s=0;
    fin>>n;
    while (n!=0){
            fin>>a;
    s=s+a;
    n--;
    }
    fout<<s;
}