#include <stdio.h>
int main (void){
  int N,M;
  scanf("%d%d",&N,&M);
  int A[N],i,sum=0;

  for(i=0;i<N;i++){
    scanf("%d",&A[i]);
    sum+=A[i];
  }

  double MM;
  int big=0,j;
  MM = sum/4*M;
  for(j=0;j<N;j++){
    if(MM>=A[j]){
      big++;
    }
  }
  
    if(big>=M){
    printf("Yes\n");
  }else{
    printf("No\n");
  }
  return 0;
}
