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Cod sursa(job #729544)
#include <iostream>
#include <fstream>
#include <cstdio>
#include <cstdlib>
#include <string>
using namespace std;
ifstream in("submultimi.in");
ofstream out("submultimi.out");
int n;
int k=1;
int sol[19];
void afisare(int k)
{
for(int i=1;i<=k;i++)
out<<sol[i]<<" ";
out<<"\n";
//out<<endl;
}
void bkt(int p)
{
if(p>1)
afisare(p-1);
for(int i= 1+sol[p-1];i<=n;i++)
{
sol[p]=i;
bkt(p+1);
}
}
int main()
{
string tmp;
in>>tmp;
n=atoi(tmp.c_str());
bkt(1);
return 0;
}