import java.util.Scanner;



public class Class {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        System.out.print("打印杨辉三角形的行数：");

        int row = scanner.nextInt();

        int[][] a = new int[row][];

        for (int i = 0; i < a.length; i++) {

            a[i] = new int[i + 1];

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

                System.out.print(" ");

            }

            for (int j = 0; j <= i; j++) { 

                if (j == 0 || j == i) {

                    a[i][j] = 1;

                } else {

                    a[i][j] = a[i - 1][j] + a[i - 1][j - 1];

                }

                System.out.print(a[i][j] + " ");

            }

            System.out.println();

        }

    }

}