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Cod sursa(job #549607)
#include <fstream>
using namespace std;
const char InFile[]="dusman.in";
const char OutFile[]="dusman.out";
const int MaxN=1024;
ifstream fin(InFile);
ofstream fout(OutFile);
int N,M,K,x,y,A[MaxN][MaxN],sol[MaxN],used[MaxN];
void back(int k)
{
if(!K)
{
return;
}
if(k>N)
{
--K;
if(!K)
{
for(register int i=1;i<=N;++i)
{
fout<<sol[i]<<" ";
}
}
return;
}
for(register int i=1;i<=N;++i)
{
if(A[i][sol[k-1]]==0)
{
if(used[i]==0)
{
used[i]=1;
sol[k]=i;
back(k+1);
used[i]=0;
}
}
}
}
int main()
{
fin>>N>>K>>M;
for(register int i=1;i<=M;++i)
{
fin>>x>>y;
A[x][y]=1;
A[y][x]=1;
}
fin.close();
back(1);
fout.close();
return 0;
}