import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        int m = scan.nextInt();
        int[] ar = new int[n];
        long sum = 0;
        for (int i = 0; i < n; i++) {
            ar[i] = scan.nextInt();
            sum+=ar[i];
        }
        double t = (double) sum/(double) (4*m);
        int cnt = 0;
        for (int i = n-1; i >= 0; i--) {
            if(ar[i] >= t) {
                cnt++;
            }
        }
        System.out.println(cnt >= m ? "Yes":"No");
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        int m = scan.nextInt();
        int[] ar = new int[n];
        long sum = 0;
        for (int i = 0; i < n; i++) {
            ar[i] = scan.nextInt();
            sum+=ar[i];
        }
        double t = (double) sum/(double) (4*m);
        int cnt = 0;
        for (int i = n-1; i >= 0; i--) {
            if(ar[i] >= t) {
                cnt++;
            }
        }
        System.out.println(cnt >= m ? "Yes":"No");
    }
} Main public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        int m = scan.nextInt();
        int[] ar = new int[n];
        long sum = 0;
        for (int i = 0; i < n; i++) {
            ar[i] = scan.nextInt();
            sum+=ar[i];
        }
        double t = (double) sum/(double) (4*m);
        int cnt = 0;
        for (int i = n-1; i >= 0; i--) {
            if(ar[i] >= t) {
                cnt++;
            }
        }
        System.out.println(cnt >= m ? "Yes":"No");
    } main {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        int m = scan.nextInt();
        int[] ar = new int[n];
        long sum = 0;
        for (int i = 0; i < n; i++) {
            ar[i] = scan.nextInt();
            sum+=ar[i];
        }
        double t = (double) sum/(double) (4*m);
        int cnt = 0;
        for (int i = n-1; i >= 0; i--) {
            if(ar[i] >= t) {
                cnt++;
            }
        }
        System.out.println(cnt >= m ? "Yes":"No");
    } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int n = scan.nextInt(); n scan.nextInt() scan.nextInt scan int m = scan.nextInt(); m scan.nextInt() scan.nextInt scan int[] ar = new int[n]; ar new int[n] n long sum = 0; sum 0 for (int i = 0; i < n; i++) {
            ar[i] = scan.nextInt();
            sum+=ar[i];
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            ar[i] = scan.nextInt();
            sum+=ar[i];
        } {
            ar[i] = scan.nextInt();
            sum+=ar[i];
        } ar[i] = scan.nextInt() ar[i] ar i scan.nextInt() scan.nextInt scan sum+=ar[i] sum ar[i] ar i double t = (double) sum/(double) (4*m); t (double) sum/(double) (4*m) (double) sum (double) (4*m) 4 m int cnt = 0; cnt 0 for (int i = n-1; i >= 0; i--) {
            if(ar[i] >= t) {
                cnt++;
            }
        } int i = n-1; int i = n-1; i n-1 n 1 i >= 0 i 0 i-- i-- i {
            if(ar[i] >= t) {
                cnt++;
            }
        } {
            if(ar[i] >= t) {
                cnt++;
            }
        } if(ar[i] >= t) {
                cnt++;
            } ar[i] >= t ar[i] ar i t {
                cnt++;
            } cnt++ cnt System.out.println(cnt >= m ? "Yes":"No") System.out.println System.out System System.out cnt >= m ? "Yes":"No" cnt >= m cnt m "Yes" "No" String[] args args public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        int m = scan.nextInt();
        int[] ar = new int[n];
        long sum = 0;
        for (int i = 0; i < n; i++) {
            ar[i] = scan.nextInt();
            sum+=ar[i];
        }
        double t = (double) sum/(double) (4*m);
        int cnt = 0;
        for (int i = n-1; i >= 0; i--) {
            if(ar[i] >= t) {
                cnt++;
            }
        }
        System.out.println(cnt >= m ? "Yes":"No");
    }
} public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        int m = scan.nextInt();
        int[] ar = new int[n];
        long sum = 0;
        for (int i = 0; i < n; i++) {
            ar[i] = scan.nextInt();
            sum+=ar[i];
        }
        double t = (double) sum/(double) (4*m);
        int cnt = 0;
        for (int i = n-1; i >= 0; i--) {
            if(ar[i] >= t) {
                cnt++;
            }
        }
        System.out.println(cnt >= m ? "Yes":"No");
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        int m = scan.nextInt();
        int[] ar = new int[n];
        long sum = 0;
        for (int i = 0; i < n; i++) {
            ar[i] = scan.nextInt();
            sum+=ar[i];
        }
        double t = (double) sum/(double) (4*m);
        int cnt = 0;
        for (int i = n-1; i >= 0; i--) {
            if(ar[i] >= t) {
                cnt++;
            }
        }
        System.out.println(cnt >= m ? "Yes":"No");
    }
}
