import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.StringTokenizer;

public class Main {
    static BufferedReader br;
    static PrintWriter out;
    static StringTokenizer st;

    public static void main(String[] args) throws IOException {
        br = new BufferedReader(new InputStreamReader(System.in));
        out = new PrintWriter(new OutputStreamWriter(System.out));
        int n = nextInt();
        int m = nextInt();
        int total = 0;
        int[] nums = new int[n];
        for (int i = 0; i < n; i++) {
            nums[i] = nextInt();
            total += nums[i];
        }

        double halve = (double) total / (4 * m);
        int selected = 0;
        for (int num: nums) if (num >= halve) selected++;
        out.println(selected >= m ? "Yes" : "No");

        out.close();
    }


    static String next() throws IOException {
        while (st == null || !st.hasMoreTokens())
            st = new StringTokenizer(br.readLine().trim());
        return st.nextToken();
    }

    static long nextLong() throws IOException {
        return Long.parseLong(next());
    }

    static int nextInt() throws IOException {
        return Integer.parseInt(next());
    }

    static double nextDouble() throws IOException {
        return Double.parseDouble(next());
    }

    static char nextCharacter() throws IOException {
        return next().charAt(0);
    }

    static String nextLine() throws IOException {
        return br.readLine().trim();
    }
}

/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