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Cod sursa(job #526701)
#include<fstream.h>
ifstream f("combinari.in"); ofstream g("combinari.out");
int n,i,k,vf,mk[31],nb1,j;
int main()
{
f>>n>>k;
vf=1<<n;
for(i=1;i<19;i++) mk[i]=1<<(i-1);
for(i=1;i<vf;i++)
{
nb1=0;
for(j=1;j<=n;j++) if(i & mk[j]) nb1++;
if(nb1==k)
{
for(j=1;j<=n;j++) if(i & mk[j]) g<<j<<' ';
g<<'\n';
}
}
g.close(); return 0;
}