#import <stdio.h>
#import <Foundation/Foundation.h>

int main(int argc, char **argv) {
  int N, M;
  scanf("%d %d", &N, &M);
  int items[N];
  int i = 0;
  int sum = 0;
  for(i=0; i<N; i++) {
    int x;
    scanf("%d", &x);
    items[i] = x;
    sum += x;
  }
  int count = 0;
  for(i=0; i<N; i++) {
    if (items[i] >= (double)sum / (4.0 * M)) {
      count ++;
    }
  }
  printf("%s", count >= M ? "Yes" : "No");
  return 0;
}