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#include <bits/stdc++.h>
using namespace std;
const int nmax = 30;
int n;
int v[nmax];
ifstream fin("submultimi.in");
ofstream fout("submultimi.out");
void afisare(int k)
{
for (int i = 1; i <= k; i++)
fout << v[i] << " ";
fout << endl;
}
void backtr(int k)
{
for(int i = v[k - 1] + 1; i <= n; i++)
{
v[k] = i;
afisare(k);
backtr(k + 1);
}
}
int main()
{
fin >> n;
backtr(1);
}