#include<stdio.h>

int main(){
  int M,N,n[99],i,j;
  int count=0;
  int sum=0;
  scanf("%d %d\n",&N,&M);
  for(i=0;i<=N-1;i++){
    scanf("%d",&n[i]);
    sum=sum+n[i];
    if(i==N-1){
      printf("\n");
    }else{
      printf(" ");
    }
  }
  for(j=0;j<=N-1;j++){
    if(n[j]>=sum/(4*M))
      count++;
  }
  if(count>=M){
    printf("Yes\n");
  }else{
    printf("No\n");
  }
  return 0;
}
