#include <stdio.h>

int main() {
  int a, b;
  scanf("%d %d",&a,&b);
  int arr[a];
  int sum = 0;
  int cnt = 0;
  for (int i = 0; i < a; ++i) scanf("%d",arr+i);
  for (int i = 0; i < a; ++i) sum += arr[i];
  for (int i = 0; i < a; ++i) if(arr[i] >= sum * (1/(4*b))) cnt += 1;
  if (cnt != b)
    printf("Yes");
  else
    printf("No");
  return 0;
}