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Cod sursa(job #87592)
#include<fstream.h>
int check(unsigned int i,unsigned int c[],unsigned int ci)
{
for(int j=0;j<ci;j++)
if(i==c[j]) return 1;
return 0;
}
int main()
{
ifstream fin("flip.in");
ofstream fout("flip.out");
unsigned int n,m,i,j,ci[1600],cj[1600],c1=0,c2=0;
long a[100][16],s=0;
fin>>n>>m;
for(i=0;i<n;i++)
for(j=0;j<m;j++)
{fin>>a[i][j];
if(!(a[i][j])){ci[c1++]=i;cj[c2++]=j;}}
for(i=0;i<n;i++)
for(j=0;j<m;j++)
if(check(i,ci,c1)||check(j,cj,c2)) s+=(-1*a[i][j]);
else s+=a[i][j];
fout<<s;
fin.close();
fout.close();
return 0;
}