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Cod sursa(job #188356)
#include<stdio.h>
#include<stdlib.h>
int main(){
int m,n,i,j,s=0;
int max,maxx=0;
int mat[16][16];
freopen("flip.in","r+",stdin);
freopen("flip.out","w+",stdout);
scanf("%d %d",&m,&n);
for(i=0;i<m;i++)
for(j=0;j<n;j++)
maxx+=scanf("%d",&mat[i][j]);
for(i=0;i<m;i++){
max=0;
for(j=0;j<n;j++)
max=mat[i][j];
if(max<0)
s=s-max;
else
s=s+max;
}
if(s>maxx)
maxx=s;
printf("%d",maxx);
return 0;
}