import java.util.Scanner;

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 c = 0;
        int total = 0;
        for(int i = 0; i < n; i++){
            a[i] = sc.nextInt();
            total += a[i];
        }
        for(int i = 0; i < n; i++){
            if((a[i] * 4 * m ) >= total){
                c++;
            }
        }
        System.out.println((c >= m) ? "Yes" : "No");
    }
} import java.util.Scanner; Scanner 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 c = 0;
        int total = 0;
        for(int i = 0; i < n; i++){
            a[i] = sc.nextInt();
            total += a[i];
        }
        for(int i = 0; i < n; i++){
            if((a[i] * 4 * m ) >= total){
                c++;
            }
        }
        System.out.println((c >= m) ? "Yes" : "No");
    }
} 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 c = 0;
        int total = 0;
        for(int i = 0; i < n; i++){
            a[i] = sc.nextInt();
            total += a[i];
        }
        for(int i = 0; i < n; i++){
            if((a[i] * 4 * m ) >= total){
                c++;
            }
        }
        System.out.println((c >= m) ? "Yes" : "No");
    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] a = new int[n];
        int c = 0;
        int total = 0;
        for(int i = 0; i < n; i++){
            a[i] = sc.nextInt();
            total += a[i];
        }
        for(int i = 0; i < n; i++){
            if((a[i] * 4 * m ) >= total){
                c++;
            }
        }
        System.out.println((c >= m) ? "Yes" : "No");
    } 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 c = 0; c 0 int total = 0; total 0 for(int i = 0; i < n; i++){
            a[i] = sc.nextInt();
            total += a[i];
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            a[i] = sc.nextInt();
            total += a[i];
        } {
            a[i] = sc.nextInt();
            total += a[i];
        } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc total += a[i] total a[i] a i for(int i = 0; i < n; i++){
            if((a[i] * 4 * m ) >= total){
                c++;
            }
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            if((a[i] * 4 * m ) >= total){
                c++;
            }
        } {
            if((a[i] * 4 * m ) >= total){
                c++;
            }
        } if((a[i] * 4 * m ) >= total){
                c++;
            } (a[i] * 4 * m ) >= total (a[i] * 4 * m ) a[i] * 4 * m a[i] a i 4 m total {
                c++;
            } c++ c System.out.println((c >= m) ? "Yes" : "No") System.out.println System.out System System.out (c >= m) ? "Yes" : "No" (c >= m) c m "Yes" "No" 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 c = 0;
        int total = 0;
        for(int i = 0; i < n; i++){
            a[i] = sc.nextInt();
            total += a[i];
        }
        for(int i = 0; i < n; i++){
            if((a[i] * 4 * m ) >= total){
                c++;
            }
        }
        System.out.println((c >= m) ? "Yes" : "No");
    }
} 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 c = 0;
        int total = 0;
        for(int i = 0; i < n; i++){
            a[i] = sc.nextInt();
            total += a[i];
        }
        for(int i = 0; i < n; i++){
            if((a[i] * 4 * m ) >= total){
                c++;
            }
        }
        System.out.println((c >= m) ? "Yes" : "No");
    }
} Main
import java.util.Scanner;

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 c = 0;
        int total = 0;
        for(int i = 0; i < n; i++){
            a[i] = sc.nextInt();
            total += a[i];
        }
        for(int i = 0; i < n; i++){
            if((a[i] * 4 * m ) >= total){
                c++;
            }
        }
        System.out.println((c >= m) ? "Yes" : "No");
    }
}