import java.io.*;

public class Main {

	public static void main(String[] args) throws IOException{
		BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(stdin.readLine().replaceAll(" ", ""));
		int r = (int)Math.floor(Math.sqrt(n));
		String ans = n == r*r ? "Yes" : "No";
		System.out.println(ans);
	}

}
/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