import java.util.Scanner;
import java.util.Arrays;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        if (m > n) {
            System.out.println("No");
            sc.close();
            return;
        }
        int sum = 0;
        int[] rating = new int[n];
        for (int i = 0; i < n; i++) {
        	rating[i] = sc.nextInt();
        	sum += rating[i];
        }
        Arrays.sort(rating);
        double minimumVote = (double)sum / 4.0 / (double)m;
        for (int i = n - m; i < n; i++) {
        	if (rating[i] < minimumVote) {
        		System.out.println("No");
        		sc.close();
        		return;
        	}
        }
        System.out.println("Yes");
        sc.close();
    }
} import java.util.Scanner; Scanner java.util import java.util.Arrays; Arrays 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();
        if (m > n) {
            System.out.println("No");
            sc.close();
            return;
        }
        int sum = 0;
        int[] rating = new int[n];
        for (int i = 0; i < n; i++) {
        	rating[i] = sc.nextInt();
        	sum += rating[i];
        }
        Arrays.sort(rating);
        double minimumVote = (double)sum / 4.0 / (double)m;
        for (int i = n - m; i < n; i++) {
        	if (rating[i] < minimumVote) {
        		System.out.println("No");
        		sc.close();
        		return;
        	}
        }
        System.out.println("Yes");
        sc.close();
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        if (m > n) {
            System.out.println("No");
            sc.close();
            return;
        }
        int sum = 0;
        int[] rating = new int[n];
        for (int i = 0; i < n; i++) {
        	rating[i] = sc.nextInt();
        	sum += rating[i];
        }
        Arrays.sort(rating);
        double minimumVote = (double)sum / 4.0 / (double)m;
        for (int i = n - m; i < n; i++) {
        	if (rating[i] < minimumVote) {
        		System.out.println("No");
        		sc.close();
        		return;
        	}
        }
        System.out.println("Yes");
        sc.close();
    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        if (m > n) {
            System.out.println("No");
            sc.close();
            return;
        }
        int sum = 0;
        int[] rating = new int[n];
        for (int i = 0; i < n; i++) {
        	rating[i] = sc.nextInt();
        	sum += rating[i];
        }
        Arrays.sort(rating);
        double minimumVote = (double)sum / 4.0 / (double)m;
        for (int i = n - m; i < n; i++) {
        	if (rating[i] < minimumVote) {
        		System.out.println("No");
        		sc.close();
        		return;
        	}
        }
        System.out.println("Yes");
        sc.close();
    } 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 if (m > n) {
            System.out.println("No");
            sc.close();
            return;
        } m > n m n {
            System.out.println("No");
            sc.close();
            return;
        } System.out.println("No") System.out.println System.out System System.out "No" sc.close() sc.close sc return; int sum = 0; sum 0 int[] rating = new int[n]; rating new int[n] n for (int i = 0; i < n; i++) {
        	rating[i] = sc.nextInt();
        	sum += rating[i];
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
        	rating[i] = sc.nextInt();
        	sum += rating[i];
        } {
        	rating[i] = sc.nextInt();
        	sum += rating[i];
        } rating[i] = sc.nextInt() rating[i] rating i sc.nextInt() sc.nextInt sc sum += rating[i] sum rating[i] rating i Arrays.sort(rating) Arrays.sort Arrays rating double minimumVote = (double)sum / 4.0 / (double)m; minimumVote (double)sum / 4.0 / (double)m (double)sum / 4.0 / (double)m (double)sum 4.0 (double)m for (int i = n - m; i < n; i++) {
        	if (rating[i] < minimumVote) {
        		System.out.println("No");
        		sc.close();
        		return;
        	}
        } int i = n - m; int i = n - m; i n - m n m i < n i n i++ i++ i {
        	if (rating[i] < minimumVote) {
        		System.out.println("No");
        		sc.close();
        		return;
        	}
        } {
        	if (rating[i] < minimumVote) {
        		System.out.println("No");
        		sc.close();
        		return;
        	}
        } if (rating[i] < minimumVote) {
        		System.out.println("No");
        		sc.close();
        		return;
        	} rating[i] < minimumVote rating[i] rating i minimumVote {
        		System.out.println("No");
        		sc.close();
        		return;
        	} System.out.println("No") System.out.println System.out System System.out "No" sc.close() sc.close sc return; System.out.println("Yes") System.out.println System.out System System.out "Yes" sc.close() sc.close sc 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();
        if (m > n) {
            System.out.println("No");
            sc.close();
            return;
        }
        int sum = 0;
        int[] rating = new int[n];
        for (int i = 0; i < n; i++) {
        	rating[i] = sc.nextInt();
        	sum += rating[i];
        }
        Arrays.sort(rating);
        double minimumVote = (double)sum / 4.0 / (double)m;
        for (int i = n - m; i < n; i++) {
        	if (rating[i] < minimumVote) {
        		System.out.println("No");
        		sc.close();
        		return;
        	}
        }
        System.out.println("Yes");
        sc.close();
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        if (m > n) {
            System.out.println("No");
            sc.close();
            return;
        }
        int sum = 0;
        int[] rating = new int[n];
        for (int i = 0; i < n; i++) {
        	rating[i] = sc.nextInt();
        	sum += rating[i];
        }
        Arrays.sort(rating);
        double minimumVote = (double)sum / 4.0 / (double)m;
        for (int i = n - m; i < n; i++) {
        	if (rating[i] < minimumVote) {
        		System.out.println("No");
        		sc.close();
        		return;
        	}
        }
        System.out.println("Yes");
        sc.close();
    }
} Main
import java.util.Scanner;
import java.util.Arrays;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        if (m > n) {
            System.out.println("No");
            sc.close();
            return;
        }
        int sum = 0;
        int[] rating = new int[n];
        for (int i = 0; i < n; i++) {
        	rating[i] = sc.nextInt();
        	sum += rating[i];
        }
        Arrays.sort(rating);
        double minimumVote = (double)sum / 4.0 / (double)m;
        for (int i = n - m; i < n; i++) {
        	if (rating[i] < minimumVote) {
        		System.out.println("No");
        		sc.close();
        		return;
        	}
        }
        System.out.println("Yes");
        sc.close();
    }
}