//
//Created by Carlgood.
//
//Note:This program is written in version DEV-C++ 5.11.
//Subject source:"hppt://oj.codingle.cn"
# include <iostream>
# include<cmath>
# include<string>
# include<cstring>
# include<cstdio>
# include<algorithm>
# include<sstream>
# define This_program_is_written_by_Carlgood_Programming_Studio 9876543210
using namespace std;
int dp[110][110],a[110][110];
int main()
{
	int t,r,c;
	cin>>t;
	while(t--)
	{
		cin>>r>>c;
		for(int i=1;i<=r;i++)
		{
			for(int j=1;j<=c;j++)
			{
				cin>>a[i][j];
			}
		}
		for(int i=1;i<=r;i++)
		{
			for(int j=1;j<=c;j++)
			{
				dp[i][j]=max(dp[i-1][j],dp[i][j-1])+a[i][j];
			}
		}
		cout<<dp[r][c]<<endl;
	}
	return 0;
}