#include<stdio.h>
int main(){
  int N,M,A[100],i,j,k,goukei=0,counter=0;
  double a;
  scanf("%d %d",&N,&M);
  for(i=0;i<N;i++){
    scanf("%d",&A[i]);
  }
  /* for(i=0;i<N;i++){
    printf("%d\n",A[i]);
    }*/

  for(j=0;j<N;j++){
    goukei=goukei+A[j];
  }
  //  printf("%d\n",goukei);
  a=(double)goukei/4/(double)M;
  // printf("%f\n",a);
  

  for(i=0;i<N;i++){
    if(a<A[i]){
      counter++;
    }
  }
  //  printf("%d",counter);
  if(counter>=M){
    printf("Yes\n");
  }
  else{
    printf("No\n");
  }
}
    
  