#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  constexpr array<int, 8> dx = { -2, -2, -1, -1, 1, 1, 2, 2 };
  constexpr array<int, 8> dy = { -1, 1, -2, 2, -2, 2, -1, 1 };
  set<pair<int, int>> cand = { { 0, 0 } };
  rep(_, 3) {
    set<pair<int, int>> nxt;
    for (const auto& [x, y] : cand) {
      rep(i, 8) nxt.insert({ x + dx[i], y + dy[i] });
    }
    cand.merge(nxt);
  }
  int x, y;
  cin >> x >> y;
  cout << (cand.contains({ x, y }) ? "YES" : "NO") << '\n';
  return 0;
}