#include <iostream>
using namespace std;
int n,m,j,x,sum;
int main()
{
cin>>n>>m;
int maxsum=0;
for (int i=1; i<=n; i++)
{
sum=0;
j=1;
while (j<=m)
{
cin>>x;
if (x!=3)
sum=sum+x;
j++;
}
if (maxsum<sum)
maxsum=sum;
}
cout<<maxsum<<endl;
return 0;
}
输入：
3 4
12 3 7 6
3 11 2 8
13 -1 13 0
输出：25