2018/12/04 PAT刷题 L1-002

 

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));
    }
}