import java.util.*;
public class Main {
    public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int M = sc.nextInt();
    int[]A = new int[N];
    
    int all = 0;
    int cou = 0;
    for(int i=0; i<N; i++){
        A[i] = sc.nextInt();
        all += A[i];
    }
    for(int i=0; i<N; i++){    
    if(A[i]>=all/4.0/M){
            cou++;
    }
    }
        if(cou>=M){
       	System.out.println("Yes");
        }else{
        System.out.println("No");
    }
}
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz