#include<bits/stdc++.h>
using namespace std;
using Int = long long;
//INSERT ABOVE HERE
Int dx[]={-2,-2,-1,-1,1,1,2,2};
Int dy[]={1,-1,2,-2,2,-2,1,-1};
void dfs(Int d,Int x,Int y){
  if(x==0&&y==0){
    cout<<"YES"<<endl;
    exit(0);
  }
  if(d==3) return;
  for(Int k=0;k<8;k++)
    dfs(d+1,x+dx[k],y+dy[k]);
}
signed main(){
  Int x,y;
  cin>>x>>y;
  dfs(0,x,y);
  cout<<"NO"<<endl;
  return 0;
}