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Cod sursa(job #623736)
#include<fstream>
using namespace std;
int a[1024][1024],n,m,K,pp,sol[1024],folosit[1024];
void back(int k);
int main()
{
ifstream fin("dusman.in");
ofstream fout("dusman.out");
fin>>n>>K>>m;
int i,aa,bb;
for(i=1;i<=m;i++)
{
fin>>aa>>bb;
a[aa][bb]=1;
a[bb][aa]=1;
}
back(1);
for(i=1;i<=n;i++)
fout<<sol[i]<<" ";
return 0;
}
void back(int k)
{
int i;
for(i=1;i<=n && K>0;i++)
if(a[sol[k-1]][i]==0 && folosit[i]==0)
{
sol[k]=i;
folosit[i]=1;
if(k==n)
K--;
else
back(k+1);
folosit[sol[k]]=0;
}
}