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Cod sursa(job #682896)
#include<iostream>
#include<fstream>
using namespace std;
int main ()
{ unsigned short i,j,m,n;
long a[16][16],s;
ifstream f("flip.in");
ofstream g("flip.out");
f>>n>>m;
for(i=1;i<=n;i++)
{s=0;
for(j=1;j<=m;j++)
{f>>a[n][m];
s+=a[n][m];}
if (s<0) for(j=1;j<=m;j++)
a[i][j]*=-1;}
for(j=1;j<=m;j++)
{ s=0;
for(i=1;i<=n;i++)
s+=a[i][j];
if (s<0) for(i=1;i<=n;i++)
a[i][j]*=-1;}
s=0;
for(i=1;i<=n;i++)
for(j=1;j<=m;j++)
s+=a[i][j];
g<<s;
f.close();
g.close();
return 0;}