#include<iostream>
#include<string>
#include<math.h>
using namespace std;
int main()
{
	string a,b;
	cin>>a>>b;
	string res=a+b;
     int chk=stoi(res);
     int d=sqrt(chk);
     cout<<(d*d==chk? "Yes": "No");
     
     
     
}
### Prompt

In Cpp, your task is to solve the following problem:

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<iostream>
#include<string>
#include<math.h>
using namespace std;
int main()
{
	string a,b;
	cin>>a>>b;
	string res=a+b;
     int chk=stoi(res);
     int d=sqrt(chk);
     cout<<(d*d==chk? "Yes": "No");
     
     
     
}
```