import java.util.*;
import java.io.*;

class test
{
	public static void main(String[] args) throws IOException
	{
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		int ct = 1, dr = 0, max = Integer.parseInt(in.readLine());
		for(int i = 1; i <= max; i++)
		{
			dr++;
			System.out.print(i);
			if(dr == ct)
			{
				dr = 0;
				ct++;
				System.out.println();
			}
			else
			{
				System.out.print(" ");
			}
		}
	}
}