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

using ll = long long;
#define rep(i, n) for(int i = 0; i < n; i++)

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