fn solve(list: &mut Vec<(i32, i32)>, mov: &[(i32, i32)], p: i32, q: i32, x: i32, y: i32, n: i32) {
    if n <= 3 {
    	list.push((p, q));
    	for &m in mov {
    		solve(list, &mov, p + m.0, q + m.1, x, y,  n + 1)
    	}
	}
}


fn main() {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    let mut s = s.trim().split_whitespace();
    let x: i32 = s.next().unwrap().parse().unwrap();
    let y: i32 = s.next().unwrap().parse().unwrap();

    let m = vec![
        (-2, -1),
        (-2, 1),
        (-1, -2),
        (-1, 2),
        (1, -2),
        (1, 2),
        (2, -1),
        (2, 1),
    ];
    
    let mut list = Vec::new();
    
    solve(&mut list, &m, 0, 0, x, y, 0);
    
    println!("{}", if list.contains(&(x, y)) { "YES" } else { "NO" });
}