#include <iostream>
#include <cmath>
using namespace std;

double dist (double a, double b, double c, double d)
{
    return sqrt((a-c)*(a-c) + (b-d)*(b-d));
}

double upcirc(double x)
{
    return 1 + sqrt(4 - (x + 1)*(x + 1));
}

double downcirc(double x)
{
    return 1 - sqrt(4 - (x + 1)*(x + 1));
}

double negline(double x)
{
    return -x;
}

double posline(double x)
{
    return 2*x + 2;
}

bool IsPointInArea (double &x, double &y)
{
    return (y >= posline(x) && y >= negline(x) && y <= upcirc(x)) || (y <= posline(x) && y <= negline(x) && y <= downcirc(x));
}

int main() {

    double x = 0.0, y = 0.0;
    cin >> x >> y ;

    if (IsPointInArea(x, y))
        cout << "YES" << endl;
    else cout << "NO" << endl;

  return 0;
}