HDU 1096 A+B for Input-Output Practice (VIII)

#include <stdio.h>
int main()
{
    int n, sum, m, i, a;
    while (scanf ("%d", &n)!=EOF)
    {
        while(n--)
        {
        scanf ("%d", &m);
        sum = 0;
        for (i=1;i<=m;i++)
        {
            scanf ("%d", &a);
            sum += a;
        }
        printf ("%d\n", sum);
        if(n != 0) printf("\n");
        }
    }
    return 0;
}