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Cod sursa(job #257786)
#include<fstream.h>
int f[17][17],s[17][17];
int main()
{
int a,b,i,j,m,x=0,n;
ifstream in("flip.in");
ofstream out("flip.out");
in>>n>>m;
for(i=1;i<=n;i++)
for(j=1;j<=m;j++)
{
in>>f[i][j];
s[i][j]=-f[i][j];
x=x+f[i][j];
}
for(j=1;j<=m;j++)
{
a=0;
b=0;
for(i=1;i<=n;i++)
{
a=a+f[i][j];
b=b+s[i][j];
}
if(a<b)
{
for(i=1;i<=n;i++)
f[i][j]=s[i][j];
}
}
for(i=1;i<=n;i++)
{
a=0;
b=0;
for(j=1;j<=m;j++)
{
a=a+f[i][j];
b=b+s[i][j];
}
if(a<b)
{
for(j=1;j<=m;j++)
f[i][j]=s[i][j];
}
}
a=0;
for(i=1;i<=n;i++)
for(j=1;j<=m;j++)
{
a=a+f[i][j];
}
if(x>a)
a=x;
out<<a;
in.close();
out.close();
return 0;
}