#include<bits/stdc++.h>
using namespace std;

int main(){
  int a,b;
  cin >> a >> b;
  string s="";
  s=to_string(a)+to_string(b);
  int n=stoi(s);
  cout << (sqrt(n)==int(sqrt(n))?"Yes":"No") << endl;
}
### Prompt

Your task is to create a CPP solution to 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<bits/stdc++.h>
using namespace std;

int main(){
  int a,b;
  cin >> a >> b;
  string s="";
  s=to_string(a)+to_string(b);
  int n=stoi(s);
  cout << (sqrt(n)==int(sqrt(n))?"Yes":"No") << endl;
}
```