#include<stdio.h>

#define N 100

void main(){
  int m, n, a[N], cnt=0;
  long int sum_vote=0;
  scanf("%d %d", &n, &m);
  for(int i=0; i<n; i++){
    scanf("%d", &a[i]);
    sum_vote += a[i]; 
  }
  
  float threshold = 0.25/m;
  for(int i=0; i<n; i++){
    float vote = a[i]*1.0/sum_vote;
//    printf("%d %f %f\n",i,vote,threshold);
    if(vote>=threshold)
      cnt++;
  }
  
  if(cnt>=m)
    printf("Yes");
  else
    printf("No");
}