

import java.util.Scanner;

public class Main {
    static class Solution {
        public void find() {

        }

    }

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] arr = new int[n];
        int sum = 0;
        for(int i=0; i<n; i++) {
            arr[i] = sc.nextInt();
            sum += arr[i];
        }
        double min = (double)sum/(4*m);
        int count =0;
        for(int i=0; i<n; i++) {
            if(arr[i] >= min) {
                count++;
            }
        }
        System.out.println(count>=m ? "Yes" : "No");
    }
} import java.util.Scanner; Scanner java.util public class Main {
    static class Solution {
        public void find() {

        }

    }

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] arr = new int[n];
        int sum = 0;
        for(int i=0; i<n; i++) {
            arr[i] = sc.nextInt();
            sum += arr[i];
        }
        double min = (double)sum/(4*m);
        int count =0;
        for(int i=0; i<n; i++) {
            if(arr[i] >= min) {
                count++;
            }
        }
        System.out.println(count>=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[] arr = new int[n];
        int sum = 0;
        for(int i=0; i<n; i++) {
            arr[i] = sc.nextInt();
            sum += arr[i];
        }
        double min = (double)sum/(4*m);
        int count =0;
        for(int i=0; i<n; i++) {
            if(arr[i] >= min) {
                count++;
            }
        }
        System.out.println(count>=m ? "Yes" : "No");
    } main {

        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] arr = new int[n];
        int sum = 0;
        for(int i=0; i<n; i++) {
            arr[i] = sc.nextInt();
            sum += arr[i];
        }
        double min = (double)sum/(4*m);
        int count =0;
        for(int i=0; i<n; i++) {
            if(arr[i] >= min) {
                count++;
            }
        }
        System.out.println(count>=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[] arr = new int[n]; arr new int[n] n int sum = 0; sum 0 for(int i=0; i<n; i++) {
            arr[i] = sc.nextInt();
            sum += arr[i];
        } int i=0; int i=0; i 0 i<n i n i++ i++ i {
            arr[i] = sc.nextInt();
            sum += arr[i];
        } {
            arr[i] = sc.nextInt();
            sum += arr[i];
        } arr[i] = sc.nextInt() arr[i] arr i sc.nextInt() sc.nextInt sc sum += arr[i] sum arr[i] arr i double min = (double)sum/(4*m); min (double)sum/(4*m) (double)sum (4*m) 4 m int count =0; count 0 for(int i=0; i<n; i++) {
            if(arr[i] >= min) {
                count++;
            }
        } int i=0; int i=0; i 0 i<n i n i++ i++ i {
            if(arr[i] >= min) {
                count++;
            }
        } {
            if(arr[i] >= min) {
                count++;
            }
        } if(arr[i] >= min) {
                count++;
            } arr[i] >= min arr[i] arr i min {
                count++;
            } count++ count System.out.println(count>=m ? "Yes" : "No") System.out.println System.out System System.out count>=m ? "Yes" : "No" count>=m count m "Yes" "No" String[] args args static class Solution {
        public void find() {

        }

    } Solution public void find() {

        } find {

        } public class Main {
    static class Solution {
        public void find() {

        }

    }

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] arr = new int[n];
        int sum = 0;
        for(int i=0; i<n; i++) {
            arr[i] = sc.nextInt();
            sum += arr[i];
        }
        double min = (double)sum/(4*m);
        int count =0;
        for(int i=0; i<n; i++) {
            if(arr[i] >= min) {
                count++;
            }
        }
        System.out.println(count>=m ? "Yes" : "No");
    }
} public class Main {
    static class Solution {
        public void find() {

        }

    }

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] arr = new int[n];
        int sum = 0;
        for(int i=0; i<n; i++) {
            arr[i] = sc.nextInt();
            sum += arr[i];
        }
        double min = (double)sum/(4*m);
        int count =0;
        for(int i=0; i<n; i++) {
            if(arr[i] >= min) {
                count++;
            }
        }
        System.out.println(count>=m ? "Yes" : "No");
    }
} Main


import java.util.Scanner;

public class Main {
    static class Solution {
        public void find() {

        }

    }

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int[] arr = new int[n];
        int sum = 0;
        for(int i=0; i<n; i++) {
            arr[i] = sc.nextInt();
            sum += arr[i];
        }
        double min = (double)sum/(4*m);
        int count =0;
        for(int i=0; i<n; i++) {
            if(arr[i] >= min) {
                count++;
            }
        }
        System.out.println(count>=m ? "Yes" : "No");
    }
}
