#include <stdio.h>

int main (void) {
  int N, M;
  int A[1000];
  int i, ns, sel;
  float limit;
  float Atotal;
  
  scanf("%d %d", &N, &M);
  Atotal = 0;
  for (i = 0; i < N; i++) {
    scanf("%d", &A[i]);
    Atotal += A[i];
  }

  limit = Atotal / (4 * M);

  ns = 0;
  for (i = 0; i < N; i++) {
    if (A[i] < limit) {
      ns++;
    }
  }
  sel = M - ns;

  if (sel < M) {
    printf("No\n");
  } else {
    printf("Yes\n");
  }

  return 0;
}
