#include <stdio.h>
int main(void){
  int N, M, i;
  int A[100];
  int sum = 0;
  int count;
  
  scanf("%d %d", &N, &M);
  
  for(i = 0; i < N; i++){
    scanf("%d", &A[i]);
    
    sum += A[i];
  }
  
  for(i = 0; i < N; i++){
    if(sum/(4 * M) <= A[i]){
      count++;
    }
  }
  
  if(count <= M)
    printf("No");
  else
    printf("Yes");
  
  return 0;
}