let inpt = readLine()!.split(separator: " ").map{ Int($0)!}

func canReach(_ x:Int, _ y:Int, _ remain:Int) -> Bool {
    if x == inpt[0] && y == inpt[1] {
        return true
    }

    if remain <= 0 {
        return false
    }
    var ret = canReach(x+1, y+2, remain-1)
    ret = ret || canReach(x+1, y-2, remain-1)
    ret = ret || canReach(x-1, y+2, remain-1)
    ret = ret || canReach(x-1, y-2, remain-1)
    ret = ret || canReach(x+2, y+1, remain-1)
    ret = ret || canReach(x+2, y-1, remain-1)
    ret = ret || canReach(x-2, y+1, remain-1)
    ret = ret || canReach(x-2, y-1, remain-1)
    return ret
}

var ans = "NO"

if canReach(0, 0, 3) {
    ans = "YES"
}
print(ans)