#include <iostream>
#include <fstream>
using namespace std;
ifstream fin ("submultimi.in");
ofstream fout ("submultimi.out");
int main()
{
    int i,n;
    fin>>n;
    i=1;
    while (i!=n) {
        int z=i;
        while (z<=n) {
            for (int j=i;j<=z;j++)
                fout<<j<<" ";
                fout<<endl;
            z++;
        }
        i++;
    }
    fout<<i;
    return 0;
}