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();
    }
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io import java.io.OutputStreamWriter; OutputStreamWriter java.io import java.io.PrintWriter; PrintWriter java.io import java.util.StringTokenizer; StringTokenizer java.util 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();
    }
} Main static BufferedReader br; br static PrintWriter out; out static StringTokenizer st; 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();
    } main {
        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();
    } br = new BufferedReader(new InputStreamReader(System.in)) br new BufferedReader(new InputStreamReader(System.in)) out = new PrintWriter(new OutputStreamWriter(System.out)) out new PrintWriter(new OutputStreamWriter(System.out)) int n = nextInt(); n nextInt() nextInt int m = nextInt(); m nextInt() nextInt int total = 0; total 0 int[] nums = new int[n]; nums new int[n] n for (int i = 0; i < n; i++) {
            nums[i] = nextInt();
            total += nums[i];
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            nums[i] = nextInt();
            total += nums[i];
        } {
            nums[i] = nextInt();
            total += nums[i];
        } nums[i] = nextInt() nums[i] nums i nextInt() nextInt total += nums[i] total nums[i] nums i double halve = (double) total / (4 * m); halve (double) total / (4 * m) (double) total (4 * m) 4 m int selected = 0; selected 0 for (int num: nums) if (num >= halve) selected++; int num nums if (num >= halve) selected++; if (num >= halve) selected++; num >= halve num halve selected++ selected out.println(selected >= m ? "Yes" : "No") out.println out selected >= m ? "Yes" : "No" selected >= m selected m "Yes" "No" out.close() out.close out String[] args args static String next() throws IOException {
        while (st == null || !st.hasMoreTokens())
            st = new StringTokenizer(br.readLine().trim());
        return st.nextToken();
    } next {
        while (st == null || !st.hasMoreTokens())
            st = new StringTokenizer(br.readLine().trim());
        return st.nextToken();
    } while (st == null || !st.hasMoreTokens())
            st = new StringTokenizer(br.readLine().trim()); st == null || !st.hasMoreTokens() st == null st null !st.hasMoreTokens() st.hasMoreTokens() st.hasMoreTokens st st = new StringTokenizer(br.readLine().trim()) st new StringTokenizer(br.readLine().trim()) return st.nextToken(); st.nextToken() st.nextToken st static long nextLong() throws IOException {
        return Long.parseLong(next());
    } nextLong {
        return Long.parseLong(next());
    } return Long.parseLong(next()); Long.parseLong(next()) Long.parseLong Long next() next static int nextInt() throws IOException {
        return Integer.parseInt(next());
    } nextInt {
        return Integer.parseInt(next());
    } return Integer.parseInt(next()); Integer.parseInt(next()) Integer.parseInt Integer next() next static double nextDouble() throws IOException {
        return Double.parseDouble(next());
    } nextDouble {
        return Double.parseDouble(next());
    } return Double.parseDouble(next()); Double.parseDouble(next()) Double.parseDouble Double next() next static char nextCharacter() throws IOException {
        return next().charAt(0);
    } nextCharacter {
        return next().charAt(0);
    } return next().charAt(0); next().charAt(0) next().charAt next() next 0 static String nextLine() throws IOException {
        return br.readLine().trim();
    } nextLine {
        return br.readLine().trim();
    } return br.readLine().trim(); br.readLine().trim() br.readLine().trim br.readLine() br.readLine br 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();
    }
} 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();
    }
} Main
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();
    }
}
