import std.algorithm;
import std.array;
import std.conv;
import std.stdio;

void main()
{
  int[] n_and_m;
  int n;
  int m;
  
  int[] a_tachi;
  int total_vote_count;
  
  n_and_m = readln.split.to!(int[]);
  n = n_and_m[0];
  m = n_and_m[1];
  
  a_tachi = readln.split.to!(int[]);
  total_vote_count = a_tachi.sum;
  
  if (a_tachi.count!(a => a * 4 * m >= total_vote_count) >= m) {
    writeln("Yes");
  } else {
    writeln("No");
  }
}
