#include<bits/stdc++.h>
using namespace std;
int x,y,z=0;
int main(){
	cin>>x>>y;
	z=x*pow(10,ceil(log10(y+1)))+y;
	if (int(sqrt(z))==sqrt(z)) cout<<"Yes"<<endl;
	else cout<<"No"<<endl;
	return 0;
}
 
### Prompt

Develop a solution in CPP to the problem described below:

AtCoDeer the deer has found two positive integers, a and b. Determine whether the concatenation of a and b in this order is a square number.

Constraints

* 1 ≤ a,b ≤ 100
* a and b are integers.

Input

Input is given from Standard Input in the following format:


a b


Output

If the concatenation of a and b in this order is a square number, print `Yes`; otherwise, print `No`.

Examples

Input

1 21


Output

Yes


Input

100 100


Output

No


Input

12 10


Output

No

### Response

```cpp
#include<bits/stdc++.h>
using namespace std;
int x,y,z=0;
int main(){
	cin>>x>>y;
	z=x*pow(10,ceil(log10(y+1)))+y;
	if (int(sqrt(z))==sqrt(z)) cout<<"Yes"<<endl;
	else cout<<"No"<<endl;
	return 0;
}
 
```