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Cod sursa(job #542911)
#include<fstream>
using namespace std;
ifstream f("flip.in");
ofstream g("flip.out");
int n, m, a[17][17], x[17], k,i,j,smax=-1;
void prelsol(){
int stot=0,s,i,j;
for(i=1; i<=n; i++){
s=0;
for(j=1; j<=m; j++) if(x[j]) s-=a[i][j]; else s+=a[i][j];
if(s<0) stot-=s;else stot+=s;
}
if(stot>smax) smax=stot;
}
int main(){
f>>n>>m;
for(i=1; i<=n; i++)
for(j=1; j<=m; j++) f>>a[i][j];
prelsol();
g<<smax<<'\n';g.close(); return 0;
}