#include <stdio.h>

int main()
{
  int N, M;
  
  scanf("%d %d", &N, &M);
  
  int vector[N];
  int i, sum = 0;
  
  for(i = 0; i < N; i++){
    scanf("%d", &vector[i]);
    sum += vector[i];
  }
  sum /= 4 * M;
  
  int count = 0;
  
  for(i = 0; i < N; i++){
    if(vector[i] >= sum){
      count++;
    }
  }
  
  if(count >= M){
    printf("Yes\n");
  }
  else{
    printf("No\n");
  }
  
}

