import std;
import core.bitop;
import core.checkedint;
import core.time;

void main() {
	int a, b;
	readf("%d %d\n", a, b);
	writeln(yes(a * 2 >= b && a <= b * 2));
}

pragma(inline)
string yes(const bool b) pure @nogc nothrow @safe {
	return b ? "Yes" : "No";
}