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Cod sursa(job #678111)
#include<iostream>
#include<fstream>
using namespace std;
ifstream f("flip.in");
ofstream g("flip.out");
int a[100][100],n,m,s1=0,s2=0;
int main ()
{
int i,j;
f>>n>>m;
for(i=1;i<=n;i++)
for(j=1;j<=m;j++)
f>>a[i][j];
for(i=1;i<=n;i++)
{
s1=0;
s2=0;
for(j=1;j<=m;j++)
s1=s1+a[i][j];
s2=(-1)*s1;
if(s2>s1)
for(j=1;j<=m;j++)
a[i][j]=(-1)*a[i][j];
}
for(i=1;i<=m;i++)
{
s1=0;
s2=0;
for(j=1;j<=n;j++)
s1=s1+a[j][i];
s2=(-1)*s1;
if(s2>s1)
for(j=1;j<=n;j++)
a[j][i]=(-1)*a[j][i];
}
s1=0;
for(i=1;i<=n;i++)
for(j=1;j<=m;j++)
s1=s1+a[i][j];
g<<s1;
}