#include <stdio.h>

int main(void) {  
int N, M;
scanf("%d%d",&N,&N);
  int vote[100];
  int sum = 0;
  for (int i = 0; i < N; ++i)
    scanf("%d",%vote[i]);
    sum += vote[i];
  
  int count = 0;
  for (int i = 0; i < N;++i)
  {
    if(vote[i] > sum / (4*M)) count++;
  }
  
  if (count >= M) printf("Yes");
  else printf("No");
  
  
 return 0; 
}