#include<bits/stdc++.h> 
using namespace std;
int main()
{
	string a,b;
	cin >> a >> b;
	int n=stoi(a+b);
	for(int x=1;x*x<=n;++x){
		if(x*x==n){
			cout << "Yes" << endl;
			return 0;
		}
	}
	cout << "No" << endl;
}
### 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<bits/stdc++.h> 
using namespace std;
int main()
{
	string a,b;
	cin >> a >> b;
	int n=stoi(a+b);
	for(int x=1;x*x<=n;++x){
		if(x*x==n){
			cout << "Yes" << endl;
			return 0;
		}
	}
	cout << "No" << endl;
}
```