//https://ncode.syosetu.com/n4830bu/240/
#include <bits/stdc++.h>
using namespace std;

int main() {
    int X, Y;
    cin >> X >> Y;
    vector<pair<int, int>> now{{0, 0}};
    const int dx[8] = {1, 1, -1, -1, 2, 2, -2, -2}, dy[8] = {2, -2, 2, -2, 1, -1, 1, -1};
    for (int _ = 0; _ < 3; _++) {
        vector<pair<int, int>> nxt;
        for (auto&& [x, y] : now) {
            for (int i = 0; i < 8; i++) {
                int x_nxt = x + dx[i], y_nxt = y + dy[i];
                if (x_nxt == X && y_nxt == Y) {
                    cout << "YES" << endl;
                    return 0;
                }
                nxt.emplace_back(x_nxt, y_nxt);
            }
        }
        swap(now, nxt);
    }
    cout << "NO" << endl;
}