#include<stdio.h>

int main(void){
  int N=0,M=0;
  int i = 1;
  int count = 0;
  int count_y = 0;
  int p[1100];

  scanf("%d %d\n",&N,&M);
  scanf("%d",&p[0]);
  count += p[0];
  for(i = 1;i<N;i++){
    scanf(" %d",&p[i]);
    count += p[i];
  }
  for(i=0;i<N;i++){
    if(p[i] >= (count / (4*M))){
      count_y++;
    }
  }
  if(count_y < M){
    printf("No");
  }else{
    printf("Yes");
  }
  return 0;
}