#include <iostream>
#include <cstring>
using namespace std;


const int N = 110;
int n;
int r, c;
int t;
int f[N];

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cin >> n ;
    while(n--)
    {
        cin >> r >> c;
        memset(f, 0, sizeof(f));
        for(int i=1; i<=r; i++)
        {
            for(int j=1; j<=c; j++)
            {
                cin >> t;
                f[j] = max(f[j-1], f[j]) + t;
            }
        }
        cout << f[c] << endl;
    }

    return 0;
}