#include<stdio.h>

int main(void){
  int n,m,i,j,k;
  int temp;
  int goukei = 0;
  scanf("%d",&n);
  int shina[n];
  scanf("%d",&m);
  for(i=0; i<n; i++){
    scanf("%d",&shina[i]);
    goukei += shina[i];
  }
  for(i=0; i<n; i++){
    for(j=i+1;j<n;j++){
      if(shina[i]<shina[j]){
        temp = shina[i];
        shina[i] = shina[j];
        shina[j] = temp;
      }
    }
  }
  if(shina[m-1] < goukei/(m*4))
    printf("No");
  else
    printf("Yes");
  return 0;
}