这道题的关键就是在于找到行数和总数之间的规律

import java.util.Scanner;public class Main {    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        int n=sc.nextInt();        String c=sc.next();                int i=1;        for(;;i++) {            if (n<2*(i+1)*(i+1)-1) {                break;            }        }        for(int j=i; j>0; j--) {            for(int blank=i-j; blank>0; blank--) {                System.out.print(" ");            }            for(int count=j*2-1; count>0; count--) {                System.out.print(c);            }            System.out.println();        }        for(int j=2; j<=i; j++) {            for(int blank=i-j; blank>0; blank--) {                System.out.print(" ");            }            for(int count=2*j-1; count>0; count--) {                System.out.print(c);            }            System.out.println();        }        System.out.print(n-(2*i*i-1));    }}