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Cod sursa(job #661695)
#include<iostream>
#include <fstream>
using namespace std;
int main()
{
ifstream fi("flip.in");
ofstream fo("flip.out");
int n,m,i,j,s,g,suma,s1,q;
fi>>n>>m;
int a[100][100]; suma=0;
for (i=1;i<=n;i++)
for(j=1;j<=m;j++) fi>>a[i][j];
for (i=1;i<=n;i++) {s=0;s1=0;
for(j=1;j<=m;j++) {s=s+a[i][j];for (q=1;q<=n;q++) s1=s1+a[j][q];
if ((s<0)&&(s*(-1)>s1)) for(g=1;g<=m;g++) a[i][g]=a[i][g]*(-1);};};
for (j=1;j<=n;j++) {s=0;s1=0;
for(i=1;i<=m;i++) {s=s+a[i][j];for (q=1;q<=m;q++) s1=s1+a[q][i];
if ((s<0)&&(s*(-1)>s1)) for(g=1;g<=n;g++) a[g][j]=a[g][j]*(-1);};};
for (i=1;i<=n;i++)
for(j=1;j<=m;j++) suma=suma+a[i][j];
fo<<suma;
fi.close();
fo.close();
}