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

int main() {
  int a, b;
  cin >> a >> b;
  if (a > 2*b){
  	cout << "No" << endl;
  }
  if (b > a*2){
  	cout<<"No"<<endl;
  }
  else{
  	cout << "Yes" << endl;
  }
}