import java.util.Scanner;

// https://atcoder.jp/contests/abc086/tasks/abc086_b
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);
		String a = sc.next();
		String b = sc.next();
		sc.close();

		int ab = Integer.parseInt(a+b);
		for(int i=0;i<=100100;i++) {
			if(i*i==ab) {
				System.out.println("Yes");
				return;
			}
		}
		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