#include <stdio.h>

int main(void)
{
  int able=0;
  int N=0,M=0,A[N];
  scanf("%d%d",&N,&M);
  for (int i=0;i<N;i++){
    scanf("%d",&A[i]);
    if (A[i]>=1/(4*M))
      able++;
  }
  if (able>=M)
    printf("Yes");
  else
    printf("No");
  return 0;
}