import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		@SuppressWarnings("resource")
		Scanner cd = new Scanner(System.in);
		String a = cd.next();
		String b = cd.next();
		int n = Integer.parseInt(a+b);
		int k =0;
		for(int i=1;i<n;i++) {
			if(n==i*i) k=n;
		}
		if(k>0)System.out.println("Yes");
		if(k==0)System.out.println("No");
		
	}

}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz