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 sum = 0;
        for (int i=0;i<n;i++){
            a[i]=sc.nextInt();
            sum+=a[i];
        }
        int ans = 0;
        for (int i=0;i<n;i++){
            if (a[i]*4*m>=sum) {
                ans++;
            }
        }
        if (ans>=m)System.out.println("Yes");
        else System.out.println("No");
    }
    static long factorial(long num){
        if (num<2)return 1;
        else return num*factorial(num-1);
    }
    static int arraySum(int[] array){
        int ans = 0;
        for (int value : array) ans += value;
        return ans;
    }
    static long combination(long a, long b){
        long data = 1;
        for (int i=0;i<b;i++){
            data*=a-i;
        }
        return data/factorial(b);
    }
    static double log(double base,double antilogarithm){
        return Math.log(antilogarithm)/Math.log(base);
    }

    static long gcd(long x,long y){
        if (y==0)return x;
        else return gcd(y,x%y);
    }
    static long lcm(long x,long y){
        return x/gcd(x,y)*y;
    }

}

/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