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Cod sursa(job #411152)
#include<stdio.h>
FILE *f,*g;
char a[1001][1001];
int viz[1001],m,n,kk,i,ok,x[1001],nr;
int cont(int k)
{
if(k>1 &&a[x[k]][x[k-1]]==1)
return 0;
return 1;
}
void tipar()
{
int i;
for(i=1;i<=n;i++)
fprintf(g,"%d ",x[i]);
}
void back()
{
int k;
k=1;x[k]=0;
while(k>0)
if(x[k]<n){
x[k]=x[k]+1;
if(viz[x[k]]==0)
if(cont(k))
{ viz[x[k]]=1;
if(k==n)
{nr++;
if(kk==nr){
tipar();
return;}
viz[x[k]]=0;
}
else
{k++;
x[k]=0;}
}
}
else{
k--;
viz[x[k]]=0;}
}
int main()
{
int x1,x2;
f=fopen("dusman.in","r");
g=fopen("dusman.out","w");
fscanf(f,"%d %d %d",&n,&kk,&m);
for(i=1;i<=m;i++)
{
fscanf(f,"%d %d",&x1,&x2);
a[x1][x2]=1;
a[x2][x1]=1;
}
back();
return 0;
}