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Cod sursa(job #678997)
#include <cstdio>
using namespace std;
int N , K , x[20];
void afiseaza ()
{
for (int i = 1 ; i <= K ; ++i)
printf ("%d " , x[i]);
printf ("\n");
}
void back (int k)
{
for (int i = 1 ; i <= N ; ++i)
{
x[k] = i;
if (x[k] > x[k - 1])
{
if (k == K)
afiseaza ();
else back (k + 1);
}
}
}
int main ()
{
freopen ("combinari.in" , "r" , stdin);
freopen ("combinari.out" , "w" , stdout);
scanf ("%d %d" , &N , &K);
back (1);
return 0;
}