use std::io::*;

fn dfs(list: &mut Vec<(i64, i64)>, mov: &[(i64, i64)], d: usize, cx: i64, cy: i64) {
    if d <= 3 {
        list.push((cx, cy));
        for &m in mov.iter() {
            dfs(list, &mov, d + 1, cx + m.0, cy + m.1);
        }
    }
}

fn main() {
    let mut s: String = String::new();
    std::io::stdin().read_to_string(&mut s).ok();
    let mut itr = s.trim().split_whitespace();
    let p = (
        itr.next().unwrap().parse::<i64>().unwrap(),
        itr.next().unwrap().parse::<i64>().unwrap(),
    );

    let mov = [
        (-2, -1),
        (-2, 1),
        (-1, -2),
        (-1, 2),
        (1, -2),
        (1, 2),
        (2, -1),
        (2, 1),
    ]
    .to_vec();

    let mut list = Vec::new();
    dfs(&mut list, &mov, 0, 0, 0);
    if let Some(_) = list.iter().find(|&&x| x == p) {
        println!("YES",)
    } else {
        println!("NO",)
    }
}