Check the number whether complete number or not.

completeNum

import java.util.*;
import java.io.*;

class Main {
	
	public static int checkCompleteNum(int num){
			// 숫자가 완전제곱수인지를 체크하는 메서드 작성.
		for(int i = 0 ; i < num ; i++){
			if ( num == i*i ){
				return 1;
			}		
		}
		
		return 0;
	}
	
	
  public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		String num1 = sc.next();
 		String num2 = sc.next();
  	int a = Integer.parseInt(num1);
  	int b = Integer.parseInt(num2);
		
		//System.out.println(num1 + " " + num2); // 입력 체크
		
		int cnt = 0;
		for (int i = a ; i <= b ; i++){
			cnt += checkCompleteNum(i);
		
		}
		
		System.out.println(cnt);
		
	}
}