import java.io.*;
import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        PrintWriter out = new PrintWriter(System.out);
//        DecimalFormat df = new DecimalFormat("0.00000000");

        String a = sc.next();
        String b = sc.next();
        boolean squareNumber = false;
        final int C = Integer.parseInt(a+b);
        for (int i = 1; i < C; i++) {
            if (i * i == C) squareNumber = true;
        }
        out.println(squareNumber ? "Yes" : "No");

        out.flush();
    }
}
/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