import java.util.*;

class NumPattern

{

public static void main(String args[])

{

int i,j,n;

System.out.println("enter no. of rows:");

Scanner sc=new Scanner(System.in);

n=sc.nextInt();

for(i=1;i<n;i++)

{

for(j=1;j<=i;j++)

System.out.print(j);

System.out.println("\n");

}

}

}