#include <stdio.h>

int main()
{
  int n,m,sum;
  sum = 0;
  scanf("%d %d",&n,&m);

  int a[n],temp;
  temp = 0;

  for(int i=0;i<n;i++)
  {
    scanf("%d",&a[i]);
  }

  for(int i=0;i<n;i++)
  {
    sum = sum + a[i];
  }

  for(int i=0; i<n-1; i++)
  {
    if(a[i] < a[i+1])
    {
      temp = a[i];
      a[i] = a[i+1];
      a[i+1] = temp;
    }
  }

  int flag = 0;
  for(int i=0; i<m; i++)
  {
    if(a[i] >= sum/(4*m))
    {
      flag = 1;
    }
    else
    {
      flag = 2;
    }
  }

  if(flag == 1)
  {
    printf("Yes\n");
  }
  else if(flag == 2)
  {
    printf("No\n");
  }
  else
  {
    printf("false\n");
  }

  return 0;
}
