#include<stdio.h>

int main(void){
  int n,i,j,m;
  int goukei = 0;
  int hantei = 0;
  scanf("%d",&n);
  int shina[n];
  scanf("%d",&m);
  for(i=0; i<n; i++){
    scanf("%d",&shina[i]);
    goukei += shina[i];
  }
  for(j=0; j<n; j++){
    if(shina[i] < goukei / (m * 4))
      hantei++;
  }
  if(n - hantei < m)
    printf("No");
  else
    printf("Yes");
  return 0;
}