Stepik_Task_8

//goo.gl/LJFweF
#include <iostream>
#include <cmath>
using namespace std;

bool IsPointInArea(int x, int y) {
    return (((pow(x - (-1), 2) + pow(y - 1, 2) <= 4) && (x >= -y) && (2 * x + 2 <= y)) || ((pow(x - (-1), 2) + pow(y - 1, 2) >= 4) && (x <= -y) && (2 * x + 2 >= y)));
}

int main() {
    int x, y;
    cin >> x >> y;
    IsPointInArea(x, y) ? cout << "YES" : cout << "NO";
    return 0;
}