View Code of Problem 57

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();

        for(int i = 1; i <= n; i ++) {
            int j;
            for(j = 1; j <= n - i; j ++) {
                System.out.print(" ");
            }
            for(j = 1; j < i; j ++) {
                System.out.print(j);
            }
            for(; j >= 1; j --) {
                System.out.print(j);
            }
            System.out.println();
        }

        for(int i = n - 1; i >= 1; i --) {
            int j;
            for(j = 1; j <= n - i; j ++) {
                System.out.print(" ");
            }
            for(j = 1; j < i; j ++) {
                System.out.print(j);
            }
            for(; j >= 1; j --) {
                System.out.print(j);
            }
            System.out.println();
        }
    }
}

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