import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
	public static void main(String args[]) throws Exception {
		double d = Math.sqrt(
				Integer.parseInt(new BufferedReader(new InputStreamReader(System.in)).readLine().replace(" ", "")));
		System.out.println((int) d == d ? "Yes" : "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