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
		Scanner sc=new Scanner(System.in);
		int a=sc.nextInt();
		int b=sc.nextInt();
		int t=b;
		int j=1;
		int ab;
		while(t>0) {
			if(t/10>=1) {
				j++;
			}
			t=t/10;
		}
		for(int i=1;i<=j;i++) {
			a=a*10;
		}
		ab=a+b;
		for(int i=1;i<=ab/2;i++) {
			if(ab==i*i) {
				System.out.println("Yes");
				break;
			}
			else if(ab!=i*i&&i==ab/2){
				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