HDU2560 Buildings

#include<cmath>
#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
using namespace std;
int main(void)
{
    int t;
    scanf("%d",&t);
    while(t--)
    {
        int n,m;
        scanf("%d%d",&n,&m);
        int a[n][m];
        int count = 0;
        for(int i = 0; i < n; i++)
            for(int j = 0; j < m; j++)
            {
                scanf("%d",&a[i][j]);
                if(a[i][j]==1)
                    count++;
            }
        printf("%d\n",count);
    }
    return 0;
}