java 代码

import java.util.Scanner;
import java.util.*;
import java.util.concurrent.ScheduledExecutorService;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n =sc.nextInt();
        char[][] cc = new char[n+1][2*n];
        String ss = "";
        for (int i = 1; i < 4*n-1; i++) {
            ss += i+"";
        }
        char[] c = ss.toCharArray();
        int tem = 0;
        for (int i = 1; i <=n ; i++) {
            for (int j = 1; j <=n+i-1 ; j++) {
                cc[i][j] = '.';
            }
        }
        for (int i = 1; i <=n-1 ; i++) {
            cc[i][n-i+1] = c[tem++];
        }
        for (int i = 1; i <=2*n-2 ; i++) {
            cc[n][i] = c[tem++];
        }
        for (int i = n; i >=2 ; i--) {
            cc[i][i+n-1] = c[tem++];
        }
        for (int i = 1; i <=n ; i++) {
            for (int j = 1; j <=n+i-1 ; j++) {
                System.out.print(cc[i][j]);
            }
            System.out.println();
        }
    }
}