#include <stdio.h>

int main(){
  long N,M,sum=0,count=0,i;
  int a[N];
  scanf("%ld %ld",&N,&M);
  for(i=0;i<N;i++){
    scanf("%d",&a[i]);
    sum+=a[i];
  }
  for(i=0;i<N;i++){
    if((a[i]/sum)>=(1/(4*M))){
      count++;
    }
  }
  if(count>=M){
    printf("Yes");
  }else{
    printf("No");
  }
}

  
