#include<stdio.h>
int main(void){
  int kind,choice,judge,count=0;
  int i,j,sum=0;
  int num[100];
    
  scanf("%d %d\n", &kind,&choice);
  for(i=0;i<kind;i++){
    scanf("%d ", &num[i]);
    sum+=num[i];
  }
  judge=sum*1/(4*choice);
  for(j=0;j<kind;j++){
    if(num[j]>=judge){
      count++;
    }
  }
  if(count>=choice){
    printf("Yes\n");
  }
  else{
    printf("No\n");
  }
  
  return 0;
}