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Cod sursa(job #656916)
#include<fstream>
using namespace std;
int st[20],n,K;
ifstream fin("combinari.in");
ofstream fout("combinari.out");
void back(int k){
if(k==K){ for(int i=1;i<=K;++i)fout<<st[i]<<' '; fout<<'\n'; }
else
{
for(int i=st[k]+1;i<=n;++i){
st[k+1]=i;
back(k+1);
}
}
}
int main(void){
int k;
fin>>n>>K; fin.close();
back(0); fout.close();
return 0;
}