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Cod sursa(job #772462)
#include <stdio.h>
#include <stdlib.h>
#define NMAX 100;
int v[33],n,mat[17][17],sir[33],k,l,suma_max=0,suma_init=0;
void citire_mat()
{
scanf("%d %d",&k,&l);
int i,j;
for(i=1;i<=k;i++)
for(j=1;j<=l;j++)
{
scanf("%d",&mat[i][j]);
suma_max+=mat[i][j];
}
suma_init=suma_max;
n=k+l;
}
void suma()
{
int s,i,j;
for(i=1;i<=k;i++)
{
s=0;
for(j=1;j<=l;j++)
s+=mat[i][j];
sir[i]=s;
}
for(j=1;j<=l;j++)
{
s=0;
for(i=1;i<=k;i++)
s+=mat[i][j];
sir[k+j]=s;
}
}
void init_vector()
{
int i;
scanf("%d", &n);
for(i=1;i<=n;i++)
v[i]=0;
}
void flip(int p)
{
int i,j,s=suma_init;
for(j=1;j<=p;j++)
{
if(v[j]<=k)
s=s-2*sir[v[j]];
else
{
s=s-2*sir[v[j]];
i=1;
while(v[i]<=k)
{
s=s-3*mat[v[i]][v[i]-k];
i++;
}
}
}
if(s>suma_max)
suma_max=s;
}
void back(int p)
{
int k;
for(k=v[p-1]+1;k<=n;k++)
{
v[p]=k;
flip (p);
back(p+1);
}
}
int main()
{
freopen("flip.in", "r", stdin);
freopen("flip.out", "w", stdout);
citire_mat();
suma();
init_vector();
back(1);
printf("%d ", suma_max);
return 0;
}