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Cod sursa(job #740771)
#include<stdio.h>
using namespace std;
int m,n,flip[17][17],i,j,smax_temp,smax;
int main()
{
freopen("flip.in","r",stdin);
freopen("flip.out","w",stdout);
scanf("%d%d",&n,&m);
for(i=1;i<=n;i++)
{
for(j=1;j<=m;j++)
{
scanf("%d\n",&flip[i][j]);
}
}
for(i=1;i<=n;i++)
{
smax_temp=0;
for(j=1;j<=n;j++)
{
smax_temp+=flip[j][i];
}
if(smax_temp<0)
{
for(j=1;j<=n;j++)
{
flip[j][i]*=-1;
}
}
}
for(i=1;i<=n;i++)
{
smax_temp=0;
for(j=1;j<=m;j++)
{
smax_temp+=flip[i][j];
}
if(smax_temp<0)
{
for(j=1;j<=m;j++)
{
flip[i][j]*=-1;
}
}
}
for(i=1;i<=n;i++)
{
for(j=1;j<=m;j++)
{
smax+=flip[i][j];
}
}
printf("\n\n%d",smax);
fclose(stdin);
fclose(stdout);
return 0;
}