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Cod sursa(job #583755)
#include <fstream>
using namespace std;
int s[19],n;
ifstream in("submultimi.in");
ofstream out("submultimi.out");
void back(int k,int Q)
{
int i;
if(k==Q)
{
for(i=0;i<k;i++)
out<<s[i]<<' ';
out<<'\n';
}
else
{
for(i=s[k-1]+1;i<=n;i++)
{
s[k]=i;
back(k+1,Q);
}
}
}
int main()
{
int i;
in>>n;
for(i=1;i<=n;i++)
back(0,i);
in.close();
out.close();
return 0;
}