#include<stdio.h>

int main() {
  int n, m;
  int sum = 0;
  int a[100];
  int cnt = 0;

  scanf("%d %d", &n, &m);
  for (int i = 0; i < n; i++) {
    scanf("%d", &a[i]);
  }

  for (int i = 0; i < n; i++) {
    int max = -1;
    int pos, tmp;
    for (int j = i; j < n; j++) {
      if (max < a[j]) {
        max = a[j];
        pos = j;
      }
    }
    tmp = a[i];
    a[i] = max;
    a[pos] = tmp;
    sum += a[i];
  }

  for (int i = 0; i < m; i++) {
    if (a[i] < sum / (4*m)) {
      break;
    }
    cnt++;
  }

  if (cnt < m) {
    printf("No");
  } else {
    printf("Yes");
  }

  return 0;
}
