Smart_Number.java

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {
    public static boolean isSmartNumber(int num) {
        int val = (int) Math.sqrt(num);  //find the square root of the number..    
        if(val*val == num)  //perfect squares have a odd number of factors..
            return true;
        return false;  
    }
    
    public static void main(String[] args) {
        int test_cases;
        Scanner in = new Scanner(System.in);
        test_cases = in.nextInt();
        int num;
        for(int i = 0; i < test_cases; i++){
            num = in.nextInt();
            boolean ans = isSmartNumber(num);
            if(ans){
                System.out.println("YES");
            }
            else System.out.println("NO");
        }
    }
}