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 lnb = (int)Math.log10(b)+1;
	int num = a*(int)Math.pow(10,lnb) + b;
	for(int i = 1; i*i<=num; i++) {
	    if(i*i==num) {
		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