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

struct Vec2D {
  Vec2D(uint64_t _x, uint64_t _y) : x(_x), y(_y) {}
  uint64_t x;
  uint64_t y;
};

bool check(const Vec2D pos, const Vec2D targ) {
  if (pos.x == targ.x && pos.y == targ.y) {
    return true;
  } else {
    return false;
  }
}

int main() {
  uint64_t X, Y;
  cin >> X >> Y;

  Vec2D moveList[8] = {Vec2D(-2, -1), Vec2D(-2, 1), Vec2D(-1, -2), Vec2D(-1, 2),
                       Vec2D(1, -2),  Vec2D(1, 2),  Vec2D(2, -1),  Vec2D(2, 1)};
  if (X == 0 && Y == 0) {
    cout << "YES" << endl;
    return 0;
  }

  const Vec2D targ(X, Y);

  for (int i = 0; i < 8; ++i) {
    Vec2D p0 = moveList[i];
    if (check(p0, targ)) {
      cout << "YES" << endl;
      return 0;
    }

    for (int j = 0; j < 8; ++j) {
      Vec2D p1 = p0;
      p1.x += moveList[j].x;
      p1.y += moveList[j].y;
      if (check(p1, targ)) {
        cout << "YES" << endl;
        return 0;
      }

      for (int k = 0; k < 8; ++k) {
        Vec2D p2 = p1;
        p2.x += moveList[k].x;
        p2.y += moveList[k].y;
        if (check(p2, targ)) {
          cout << "YES" << endl;
          return 0;
        }
      }
    }
  }

  cout << "NO" << endl;
}