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Cod sursa(job #517882)
#include <cstdio>
#define file_in "dusman.in"
#define file_out "dusman.out"
int N,M,K,x,y;
int sol[10100];
int A[1010][1010];
char viz[10100];
void back(int k){
if (K<0)
return ;
if (k>N){
if (--K==0)
for (int i=1;i<=N;++i) printf("%d ", sol[i]);
return ;
}
for (int i=1;i<=N;++i){
if (!viz[i]&& !A[sol[k-1]][i]){
sol[k]=i;
viz[i]=1;
back(k+1);
viz[i]=0;
}
}
}
int main(){
freopen(file_in,"r",stdin);
freopen(file_out,"w",stdout);
scanf("%d %d %d", &N, &K, &M);
while(M--){
scanf("%d %d", &x, &y);
A[x][y]=A[y][x]=1;
}
back(1);
return 0;
}