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Cod sursa(job #376477)
#include<stdio.h>
#include<stdlib.h>
#define DIM 1005
char a[DIM][DIM];
int n,m,b[DIM],k2,k,v[DIM];
void read ()
{
int i,x,y;
scanf("%d%d%d",&n,&k,&m);
for(i=1;i<=m;++i)
scanf("%d%d",&x,&y),a[x][y]=a[y][x]=1;
}
void show ()
{
int i;
for(i=1;i<=n;++i)
printf("%d ",b[i]);
exit (0);
}
void back (int x)
{
int i;
if(x==n+1)
++k2;
else
for(i=1;i<=n;++i)
if(!a[b[x-1]][i] && !v[i])
{
b[x]=i;
v[i]=1;
back(x+1);
v[i]=0;
}
if(k2==k)
show ();
}
int main ()
{
freopen("dusman.in","r",stdin);
freopen("dusman.out","w",stdout);
read ();
back(1);
return 0;
}