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Cod sursa(job #464902)
#include<stdio.h>
int v[20]
, n, k, poz;
void back(int poz){
int i;
if(poz==k+1){
for(i=1; i<=k; i++){
printf("%d ", v[i]);
}
printf("\n");
}
else{
for(i=v[poz-1]+1; i<=n; i++){
v[poz]=i;
back(poz+1);
}
}
}
int main(){
freopen ("combinari.in", "r", stdin);
freopen ("combinari.out", "w", stdout);
scanf("%d %d ", &n, &k);
back(1);
return 0;
}