import std.stdio;
import std.conv;
import std.string;
import std.algorithm;
import std.math;

void main() {
  int n, m;
  readf("%d %d\n", &n, &m);
  int m2 = m;
  auto a = readln.chomp.split.map!(to!int);
  int sum = 0;
  foreach(ai; a) sum += ai;
  foreach(ai; a) {
    if(ai*4*m >= sum) m2--;
    if(m2 == 0) {
      writeln("Yes");
      return;
    }
  }
  writeln("No");
}
