
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Scanner;

class Main {
	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int N = Integer.parseInt(sc.next());
		int M = Integer.parseInt(sc.next());

		List<Integer> s = new ArrayList();
		int total = 0;
		for(int i =0; i <N ; i++) {
			int a =Integer.parseInt(sc.next());
			total += a;
			s.add(a);
		}
		Collections.sort(s);
		Collections.reverse(s);


		for(int m = 0; m < M; m++) {
			int a = s.get(m);
			if(a*4*M < total) {
				System.out.println("No");
				return;
			}
		}

		System.out.println("Yes");

	}
} import java.util.ArrayList; ArrayList java.util import java.util.Collections; Collections java.util import java.util.List; List java.util import java.util.Scanner; Scanner java.util class Main {
	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int N = Integer.parseInt(sc.next());
		int M = Integer.parseInt(sc.next());

		List<Integer> s = new ArrayList();
		int total = 0;
		for(int i =0; i <N ; i++) {
			int a =Integer.parseInt(sc.next());
			total += a;
			s.add(a);
		}
		Collections.sort(s);
		Collections.reverse(s);


		for(int m = 0; m < M; m++) {
			int a = s.get(m);
			if(a*4*M < total) {
				System.out.println("No");
				return;
			}
		}

		System.out.println("Yes");

	}
} Main public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int N = Integer.parseInt(sc.next());
		int M = Integer.parseInt(sc.next());

		List<Integer> s = new ArrayList();
		int total = 0;
		for(int i =0; i <N ; i++) {
			int a =Integer.parseInt(sc.next());
			total += a;
			s.add(a);
		}
		Collections.sort(s);
		Collections.reverse(s);


		for(int m = 0; m < M; m++) {
			int a = s.get(m);
			if(a*4*M < total) {
				System.out.println("No");
				return;
			}
		}

		System.out.println("Yes");

	} main {

		Scanner sc = new Scanner(System.in);

		int N = Integer.parseInt(sc.next());
		int M = Integer.parseInt(sc.next());

		List<Integer> s = new ArrayList();
		int total = 0;
		for(int i =0; i <N ; i++) {
			int a =Integer.parseInt(sc.next());
			total += a;
			s.add(a);
		}
		Collections.sort(s);
		Collections.reverse(s);


		for(int m = 0; m < M; m++) {
			int a = s.get(m);
			if(a*4*M < total) {
				System.out.println("No");
				return;
			}
		}

		System.out.println("Yes");

	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = Integer.parseInt(sc.next()); N Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int M = Integer.parseInt(sc.next()); M Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc List<Integer> s = new ArrayList(); s new ArrayList() int total = 0; total 0 for(int i =0; i <N ; i++) {
			int a =Integer.parseInt(sc.next());
			total += a;
			s.add(a);
		} int i =0; int i =0; i 0 i <N i N i++ i++ i {
			int a =Integer.parseInt(sc.next());
			total += a;
			s.add(a);
		} {
			int a =Integer.parseInt(sc.next());
			total += a;
			s.add(a);
		} int a =Integer.parseInt(sc.next()); a Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc total += a total a s.add(a) s.add s a Collections.sort(s) Collections.sort Collections s Collections.reverse(s) Collections.reverse Collections s for(int m = 0; m < M; m++) {
			int a = s.get(m);
			if(a*4*M < total) {
				System.out.println("No");
				return;
			}
		} int m = 0; int m = 0; m 0 m < M m M m++ m++ m {
			int a = s.get(m);
			if(a*4*M < total) {
				System.out.println("No");
				return;
			}
		} {
			int a = s.get(m);
			if(a*4*M < total) {
				System.out.println("No");
				return;
			}
		} int a = s.get(m); a s.get(m) s.get s m if(a*4*M < total) {
				System.out.println("No");
				return;
			} a*4*M < total a*4*M a*4*M a 4 M total {
				System.out.println("No");
				return;
			} System.out.println("No") System.out.println System.out System System.out "No" return; System.out.println("Yes") System.out.println System.out System System.out "Yes" String[] args args

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Scanner;

class Main {
	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int N = Integer.parseInt(sc.next());
		int M = Integer.parseInt(sc.next());

		List<Integer> s = new ArrayList();
		int total = 0;
		for(int i =0; i <N ; i++) {
			int a =Integer.parseInt(sc.next());
			total += a;
			s.add(a);
		}
		Collections.sort(s);
		Collections.reverse(s);


		for(int m = 0; m < M; m++) {
			int a = s.get(m);
			if(a*4*M < total) {
				System.out.println("No");
				return;
			}
		}

		System.out.println("Yes");

	}
}