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

int X, Y, ans;

int knight[8][2] = {{-2,-1}, {-2,+1}, {-1,-2}, {-1,+2},
                    {+1,-2}, {+1,+2}, {+2,-1}, {+2,+1}};

void recursive(int x, int y, int n) {
    if(X == x && Y == y) ans = 1;
    if(n == 3) return;
    for(int i = 0; i < 8; i++) {
        recursive(x + knight[i][0], y + knight[i][1], n + 1);
    }
}

int main() {
    #ifdef DEBUG
    std::ifstream in("/home/share/inputf.in");
    std::cin.rdbuf(in.rdbuf());
    #endif
    cin >> X >> Y;
    recursive(0, 0, 0);
    cout << (ans ? "YES" : "NO") << endl;
    return 0;
}