#include <stdio.h>
#include <stdlib.h>

int compare_int(const void *a, const void *b){
  return *(int *)b - *(int *)a;
}

int main(int argc, char const *argv[]) {

  int N, M, sum;
  sum = 0;
  scanf("%d", &N);
  scanf("%d", &M);

  int A[100];
  for (int i = 0; i < N; i++) {
    scanf("%d", A + i);
    sum = sum + A[i];
  }

  qsort(A, N, sizeof(int), compare_int);

  int min = sum / (4 * M);

  if (A[(M - 1)] < min) {
    printf("No\n");
  }else if(A[(M - 1)] > min){
    printf("Yes\n");
  }else if(A[(M - 1)] == min){
    if (sum % (4 * M)) {
      printf("No\n");
    }else{
      printf("Yes\n");
    }
  }

  return 0;
}
