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Cod sursa(job #286096)
#include<fstream.h>
int n,p,k,x[20];
ifstream f("combinari.in");
ofstream g("combinari.out");
void tipar()
{
int i;
for (i=1;i<=k;i++) g<<x[i]<<" ";
g<<'\n';
}
int sol(int k)
{
if (k==p) return 1;
return 0;
}
void back()
{
k=1;
x[k]=0;
while (k>0)
if (x[k]<n)
{
x[k]++;
if (sol(k)) tipar();
else {k++;x[k]=x[k-1];}
}
else k--;
}
int main()
{
f>>n>>p;
back();
return 0;
}