#include <bits/stdc++.h>
using namespace std;

int x, y;

int dx[8] = {-2, -2, -1, -1, 1, 1, 2, 2};
int dy[8] = {-1, 1, -2, 2, -2, 2, -1, 1};

bool dfs(int a, int b, int cnt){
    if(a == x and b == y) return true;
    if(cnt == 3) return false;
    for(int i = 0; i < 8; i++){
        int nx, ny;
        nx = dx[i] + a;
        ny = dy[i] + b;
        if(dfs(nx, ny, cnt + 1)) return true;
    }
    return false;
}

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);

    cin >> x >> y;
    
    if(dfs(0, 0, 0)){
        cout << "YES" << endl;
    }else{
        cout << "NO" << endl; 
    }

    return 0;
}