import std.stdio;
import std.algorithm;

void main() {
	int n, m;
	readf(" %s %s", &n, &m);
	auto a = new int[n];
	foreach (ref e;a) {
		readf(" %s", &e);
	}

	int total = a.reduce!"a + b";
	auto populars = a.count!(x => x * m * 4 >= total);

	if (populars >= m) {
		writeln("Yes");
	} else {
		writeln("No");
	}
}
