#include <bits/stdc++.h>

int gx, gy;

bool solve(int d, int x, int y) {
  if( x == gx && y == gy ) return true;
  if( d == 0 ) return false;

  int dx[8] = {-2, -2, -1, -1, 1, 1, 2, 2};
  int dy[8] = {-1, 1, -2, 2, -2, 2, -1, 1};

  for(int i = 0; i < 8; ++i) {
    if( solve(d - 1, x + dx[i], y + dy[i]) ) return true;
  }

  return false;
}

int main() {

  std::cin >> gx >> gy;

  if( solve(3, 0, 0) ) {
    std::cout << "YES" << std::endl;
  }
  else {
    std::cout << "NO" << std::endl;
  }
  
  return 0;
}