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

int x[8]={1,1,2,2,-1,-1,-2,-2},y[8]={2,-2,1,-1,2,-2,1,-1};
typedef pair<int,int> P;
template<typename T>
void fin(T a){
  cout<<a<<endl;
  exit(0);
}

signed main(){
  int xx,yy;cin>>xx>>yy;
  vector<P> v;
  v.push_back(P(0,0));
  for(int _=0;_<3;_++){
    int a=v.size();
    for(int i=0;i<a;i++)for(int j=0;j<8;j++)v.push_back(P(v[i].first+x[j],v[i].second+y[j]));
  }
  for(P p:v)if(p==P(xx,yy))fin("YES");
  fin("NO");
}