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

int main(){
    int sy, sx;
    cin >> sy >> sx;
    vector<pair<int,int>> dir = {{-2,-1},{-2,1},{-1,-2},{-1,2},{1,-2},{1,2},{2,-1},{2,1}};
    function<bool(int,int,int)> dfs = [&](int y, int x, int d){
        if(y == sy && x == sx)return true;
        if(d == 3)return false;
        for(auto &&p:dir){
            if(dfs(y + p.first, x + p.second, d + 1))return true;
        }
        return false;
    };
    cout << (dfs(0, 0, 0) ? "YES" : "NO") << endl;
}