[SWEA] 제곱 팰린드롬 수

 

 

[문제]

https://swexpertacademy.com/main/code/problem/problemDetail.do?contestProbId=AXO72aaqPrcDFAXS

SW Expert Academy

 

 

 

[소스 코드]

import java.io.*;
import java.util.*;
public class Solution {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st;
		int T = Integer.parseInt(br.readLine());
		for(int tc=1;tc<=T;tc++) {
			st = new StringTokenizer(br.readLine());
			int a = Integer.parseInt(st.nextToken());
			int b = Integer.parseInt(st.nextToken());
			int result = 0;
			for(int i=a;i<=b;i++) {
				if(i%Math.sqrt(i)==0) {
					if(check(i) && check((int)Math.sqrt(i))) {
						result++;
					}
				}
			}
			System.out.println("#"+tc+" "+result);
		}
	}
	private static boolean check(int num) {
		String s = String.valueOf(num);
		for(int i=0;i<s.length()/2;i++) {
			if(s.charAt(i)!=s.charAt(s.length()-1-i)) 
				return false;
		}
		return true;
	}
}