#include <bits/stdc++.h>

using namespace std;

#define REP(i,n) for(int i=0; i<(int)(n); i++)

set<pair<int, int> > vis;

void go(int x, int y, int d = 0) {
  if (d > 3) return;
  vis.insert({x, y});
  for (int i = -2; i <= 2; i++) {
    for (int j = -2; j <= 2; j++) {
      if ((abs(i) == 2 && abs(j) == 1) || (abs(i) == 1&& abs(j) == 2)) {
        go(x+i, y+j, d+1);
      }
    }
  }
}

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);

  go(0, 0);

  int x, y;
  cin >> x >> y;

  if (vis.count({x, y}))
    cout << "YES" << endl;
  else
    cout << "NO" << endl;
  
  return 0;
}