#include<iostream>
using namespace std;

const int N = 110;

int t;
int f[N][N];

int main(){
    cin>>t;
    while(t--)
    {
        int a,b;cin>>a>>b;
        for(int i=1;i<=a;i++)
            for(int j=1;j<=b;j++)
                cin>>f[i][j];

        for(int i=1;i<=a;i++)
        {
            for(int j=1;j<=b;j++)
            {
                f[i][j] = f[i][j] + max(f[i-1][j], f[i][j-1]);       
            }
        }
        cout<<f[a][b]<<endl;
    }
    return 0;
}