#include<iostream.h>   
void main()   
{   
int m,n,a[100][100],i,j,s1=0,s2=0,max=0;   
cout<<"n=";cin>>n;   
cout<<"m=";cin>>m;   
for(i=1;i<=n;i++)   
for(j=1;j<=m;j++)   
cin>>a[i][j];   
if(i<0 && j>0 && sqrt(i>j))   
  s1=s1+a[i][j]*(-1);   
if(i>0 && j<0 && sqrt(j>i))   
  s2=s2+a[i][j]*(-1);   
if (s1>max)   
  max=s1;   
if (s2>max)   
  max=s2;   
if(s1>s2)   
  max=s2;   
  s2=s1;   
  s1=max;   
else  
   max=s1;   
   s1=s2;   
   s2=max;   
cout<<"max="<<max;   
}