#include <iostream>
#include <vector>
using namespace std;

vector<pair<int,int>> v;
int dx[8]={1,1,-1,-1,2,2,-2,-2};
int dy[8]={2,-2,2,-2,1,-1,1,-1};

void calc(int a,int b,int c){
  if(c<3){
    for(int i=0; i<8; ++i){
      int a2=a+dx[i];
      int b2=b+dy[i];
      int c2=c+1;
      v.push_back(make_pair(a2,b2));
      calc(a2,b2,c2);
    }
  }
}

int main(){
  int x,y;
  cin>>x>>y;
  int a=0,b=0,c=0;
  v.push_back(make_pair(0,0));
  calc(a,b,c);
  string s="NO";
  for(int i=0; i<v.size(); ++i){
    int x2=v[i].first;
    int y2=v[i].second;
    if(x2==x && y2==y){
      s="YES";
      break;
    }
  }
  cout<<s<<endl;
  return 0;
}