#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,m,n) for(int i=m; i<n; ++i)
#define repl(i,m,n) for(ll i=m; i<n; ++i)

int main(){
    int A, B;
    cin >> A >> B;

    if(A > 2*B || 2*A < B) cout << "No" << endl;
    else cout << "Yes" << endl;
    
    return 0;
}