import java.util.*;
import java.lang.*;

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[] A = new int[n];
        double voteSum = 0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            voteSum += a[i];
        }
        Arrays.sort(a);
        for (int j = 0; j < m; j++) {
            if (a[n - j - 1] >= voteSum / (4 * m)) {
            } else {
                System.out.println("No");
                System.exit(0);
            }
        }
        System.out.println("Yes");
    }
} import java.util.*; util.* java import java.lang.*; lang.* java 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[] A = new int[n];
        double voteSum = 0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            voteSum += a[i];
        }
        Arrays.sort(a);
        for (int j = 0; j < m; j++) {
            if (a[n - j - 1] >= voteSum / (4 * m)) {
            } else {
                System.out.println("No");
                System.exit(0);
            }
        }
        System.out.println("Yes");
    }
} 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[] A = new int[n];
        double voteSum = 0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            voteSum += a[i];
        }
        Arrays.sort(a);
        for (int j = 0; j < m; j++) {
            if (a[n - j - 1] >= voteSum / (4 * m)) {
            } else {
                System.out.println("No");
                System.exit(0);
            }
        }
        System.out.println("Yes");
    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] a = new int[n];
        int[] A = new int[n];
        double voteSum = 0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            voteSum += a[i];
        }
        Arrays.sort(a);
        for (int j = 0; j < m; j++) {
            if (a[n - j - 1] >= voteSum / (4 * m)) {
            } else {
                System.out.println("No");
                System.exit(0);
            }
        }
        System.out.println("Yes");
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int m = sc.nextInt(); m sc.nextInt() sc.nextInt sc int[] a = new int[n]; a new int[n] n int[] A = new int[n]; A new int[n] n double voteSum = 0; voteSum 0 for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            voteSum += a[i];
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            a[i] = sc.nextInt();
            voteSum += a[i];
        } {
            a[i] = sc.nextInt();
            voteSum += a[i];
        } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc voteSum += a[i] voteSum a[i] a i Arrays.sort(a) Arrays.sort Arrays a for (int j = 0; j < m; j++) {
            if (a[n - j - 1] >= voteSum / (4 * m)) {
            } else {
                System.out.println("No");
                System.exit(0);
            }
        } int j = 0; int j = 0; j 0 j < m j m j++ j++ j {
            if (a[n - j - 1] >= voteSum / (4 * m)) {
            } else {
                System.out.println("No");
                System.exit(0);
            }
        } {
            if (a[n - j - 1] >= voteSum / (4 * m)) {
            } else {
                System.out.println("No");
                System.exit(0);
            }
        } if (a[n - j - 1] >= voteSum / (4 * m)) {
            } else {
                System.out.println("No");
                System.exit(0);
            } a[n - j - 1] >= voteSum / (4 * m) a[n - j - 1] a n - j - 1 n - j - 1 n j 1 voteSum / (4 * m) voteSum (4 * m) 4 m {
            } {
                System.out.println("No");
                System.exit(0);
            } System.out.println("No") System.out.println System.out System System.out "No" System.exit(0) System.exit System 0 System.out.println("Yes") System.out.println System.out System System.out "Yes" String[] args args 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[] A = new int[n];
        double voteSum = 0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            voteSum += a[i];
        }
        Arrays.sort(a);
        for (int j = 0; j < m; j++) {
            if (a[n - j - 1] >= voteSum / (4 * m)) {
            } else {
                System.out.println("No");
                System.exit(0);
            }
        }
        System.out.println("Yes");
    }
} 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[] A = new int[n];
        double voteSum = 0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            voteSum += a[i];
        }
        Arrays.sort(a);
        for (int j = 0; j < m; j++) {
            if (a[n - j - 1] >= voteSum / (4 * m)) {
            } else {
                System.out.println("No");
                System.exit(0);
            }
        }
        System.out.println("Yes");
    }
} Main
import java.util.*;
import java.lang.*;

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[] A = new int[n];
        double voteSum = 0;
        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            voteSum += a[i];
        }
        Arrays.sort(a);
        for (int j = 0; j < m; j++) {
            if (a[n - j - 1] >= voteSum / (4 * m)) {
            } else {
                System.out.println("No");
                System.exit(0);
            }
        }
        System.out.println("Yes");
    }
}