import java.util.Scanner;

public class NumberPyramid {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

System.out.print("Enter the number of levels: ");

int l = scanner.nextInt();

scanner.close();

for (int i = 1; i <= l; i++) {

// Print leading spaces

for (int j = 0; j < (l - i) * (l - i - 1) / 2; j++) {

System.out.print(" ");

}

// Print numbers with spaces in between

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

System.out.print(j);

if (j < i) {

System.out.print(" "); // Extra spaces between numbers

}

}

System.out.println(); // Move to next line

}

}

}