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Cod sursa(job #929755)
#include<stdio.h>
int n , nr;
int v[20];
void back(int k)
{
if(k == n+1)
{
for(int i=1 ; i<=n ; ++i)
printf("%d " , v[i]);
printf("\n");
}
for(int i=v[k-1]+1 ; i<=nr ; ++i)
{
v[k]=i;
if(k <= n)
back(k+1);
}
}
int main()
{
freopen("combinari.in" , "r" , stdin);
freopen("combinari.out" , "w" , stdout);
scanf("%d %d" , &nr , &n);
back(1);
return 0;
}