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


int main(){
  int i, j, count, sum;
  int n, m;
  scanf("%d %d", &n, &m);

  int A[n];
  sum = 0;
  for(i=0; i<n; i++){
    scanf("%d", &A[i]);
    sum += A[i];
  }
  count = 0;
  for(i=0; i<n; i++){
    if( ((double)A[i] / sum)  > (1.0 / (4*m)) ){
      count++;
    }
  }

  if(count >= m){
    printf("Yes\n");
  }else{
    printf("No\n");
  }

  return 0;
}
