暴力題-你好2020

暴力題-你好2020

描述

思路

暴力

代碼

import java.util.*;

public class 你好 {
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		System.out.println(getCount(n));
	}

	public static int getCount(int n) {
		
		int count = 0;
		for (int i = 1; i <= n; i++) {
			String tmp = i + "";
			int len = tmp.length();
			if ((len & 1) == 1)
				continue;
			int tmpval = i;
			int tmpval2 = 0;
			for (int k = 0; k < len / 2; k++) {
				
				tmpval2 += (int) (Math.pow(10,k)*(tmpval%10));
				
				tmpval/=10;
//				System.out.print(tmpval+" ");
//				System.out.println(tmpval2);
			}
			
			if (tmpval2 == tmpval)
				count+=i;
			
		}
		
		return count;
	}
}