import java.util.*;

class Main {
	public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int h = 1;
        int bLen = String.valueOf(b).length();
        for (int i=0 ; i<bLen ; i++) {
            h = h*10;
        }
        int ab = (a*h)+b;
        double lootb = Math.sqrt(ab);
        int lb = (int) (lootb);
        if(lb*lb==ab) 
        	System.out.println("Yes");
        else
        	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