r57_wrong

#include <iostream>
using namespace std;
int main()
{
    double x, y;
    cin >> x >> y;
    if (x <= 1 && x >= -1 && y <= 1 && y >= -1 || x * x + y * y == 1) {
        cout << "YES";
    }
    else {
        cout << "NO";
    }
}