#include <iostream>
using namespace std;

int x,y;

bool dfs(int a,int b,int n){
   if(n > 3) return false;
   else if(x == a && y == b) return true;
   else{
      int dx[] = {-2,-2,-1,-1,1,1,2,2},dy[] = {-1,1,-2,2,-2,2,-1,1};
      bool check = false;
      for(int i = 0;i < 8;i++) check |= dfs(a + dx[i],b + dy[i],n + 1);
      return check;
   }
}

int main(){
   cin >> x >> y;
   cout << (dfs(0,0,0) ? "YES" : "NO") << endl;
}