A+B for Input-Output Practice (VIII)

http://acm.hdu.edu.cn/showproblem.php?pid=1096

Problem Description
Your task is to calculate the sum of some integers.

Input
Input contains an integer N in the first line, and then N lines follow. Each line starts with a integer M, and then M integers follow in the same line.

Output
For each group of input integers you should output their sum in one line, and you must note that there is a blank line between outputs.

Sample Input

3
4 1 2 3 4
5 1 2 3 4 5
3 1 2 3


Sample Output

10
 
15
 
6
 
-----------------------------------------

#include <iostream>
using namespace std;
int main()
{
    int m,n,a,s;
    cin >> m;
    for (int i=1;i<=m;i++)
    {
        cin >> n;
        s=0;
        for (int j=1;j<=n;j++)
        {
            cin >> a;
            s+=a;
        }
        if (i!=m)
        cout << s << endl << endl;
        else
        cout << s << endl;
    }
    return 0;
}