#include <stdio.h>
int main(){
  int M, N;
  int A[1000];
  scanf("%d %d", &N, &M);
  for (int i < 0; i < N; i++) {
    scanf("%d", &A[i]);
  }
  int total = 0;
  for (int i = 0; i < N; i++) {
    total += A[i];
  }
  int count = 0;
  for (int i = 0; i < N; i++) {
    if (A[i] >= total / (4.0 * M)) {
      count += 1;
    }
  }
  if (count >= M) {
    printf("Yes");
  }
  else {
    printf("No");
  }
  return 0;
}