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();
	System.out.println();
	int[] A = new int[N];
	int total = 0;
	for(int i = 0; i < N; i++){
	    A[i] = sc.nextInt();
	    total += A[i];
	}

	int L = 0;
	for(int i = 0; i < N; i++){
	    int comp = A[i]*4*M;
	    if(total <= comp){
		L++;
	    }
	}

	String ans = "No";
	if(M <= L){
	    ans = "Yes";
	}

	System.out.println(ans);

    }
} 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();
	System.out.println();
	int[] A = new int[N];
	int total = 0;
	for(int i = 0; i < N; i++){
	    A[i] = sc.nextInt();
	    total += A[i];
	}

	int L = 0;
	for(int i = 0; i < N; i++){
	    int comp = A[i]*4*M;
	    if(total <= comp){
		L++;
	    }
	}

	String ans = "No";
	if(M <= L){
	    ans = "Yes";
	}

	System.out.println(ans);

    }
} Main public static void main(String[] args){
	Scanner sc = new Scanner(System.in);
	int N = sc.nextInt();
	int M = sc.nextInt();
	System.out.println();
	int[] A = new int[N];
	int total = 0;
	for(int i = 0; i < N; i++){
	    A[i] = sc.nextInt();
	    total += A[i];
	}

	int L = 0;
	for(int i = 0; i < N; i++){
	    int comp = A[i]*4*M;
	    if(total <= comp){
		L++;
	    }
	}

	String ans = "No";
	if(M <= L){
	    ans = "Yes";
	}

	System.out.println(ans);

    } main {
	Scanner sc = new Scanner(System.in);
	int N = sc.nextInt();
	int M = sc.nextInt();
	System.out.println();
	int[] A = new int[N];
	int total = 0;
	for(int i = 0; i < N; i++){
	    A[i] = sc.nextInt();
	    total += A[i];
	}

	int L = 0;
	for(int i = 0; i < N; i++){
	    int comp = A[i]*4*M;
	    if(total <= comp){
		L++;
	    }
	}

	String ans = "No";
	if(M <= L){
	    ans = "Yes";
	}

	System.out.println(ans);

    } 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 System.out.println() System.out.println System.out System System.out int[] A = new int[N]; A new int[N] N 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 int L = 0; L 0 for(int i = 0; i < N; i++){
	    int comp = A[i]*4*M;
	    if(total <= comp){
		L++;
	    }
	} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
	    int comp = A[i]*4*M;
	    if(total <= comp){
		L++;
	    }
	} {
	    int comp = A[i]*4*M;
	    if(total <= comp){
		L++;
	    }
	} int comp = A[i]*4*M; comp A[i]*4*M A[i]*4*M A[i] A i 4 M if(total <= comp){
		L++;
	    } total <= comp total comp {
		L++;
	    } L++ L String ans = "No"; ans "No" if(M <= L){
	    ans = "Yes";
	} M <= L M L {
	    ans = "Yes";
	} ans = "Yes" ans "Yes" System.out.println(ans) System.out.println System.out System System.out ans 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();
	System.out.println();
	int[] A = new int[N];
	int total = 0;
	for(int i = 0; i < N; i++){
	    A[i] = sc.nextInt();
	    total += A[i];
	}

	int L = 0;
	for(int i = 0; i < N; i++){
	    int comp = A[i]*4*M;
	    if(total <= comp){
		L++;
	    }
	}

	String ans = "No";
	if(M <= L){
	    ans = "Yes";
	}

	System.out.println(ans);

    }
} public class Main{
    public static void main(String[] args){
	Scanner sc = new Scanner(System.in);
	int N = sc.nextInt();
	int M = sc.nextInt();
	System.out.println();
	int[] A = new int[N];
	int total = 0;
	for(int i = 0; i < N; i++){
	    A[i] = sc.nextInt();
	    total += A[i];
	}

	int L = 0;
	for(int i = 0; i < N; i++){
	    int comp = A[i]*4*M;
	    if(total <= comp){
		L++;
	    }
	}

	String ans = "No";
	if(M <= L){
	    ans = "Yes";
	}

	System.out.println(ans);

    }
} 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();
	System.out.println();
	int[] A = new int[N];
	int total = 0;
	for(int i = 0; i < N; i++){
	    A[i] = sc.nextInt();
	    total += A[i];
	}

	int L = 0;
	for(int i = 0; i < N; i++){
	    int comp = A[i]*4*M;
	    if(total <= comp){
		L++;
	    }
	}

	String ans = "No";
	if(M <= L){
	    ans = "Yes";
	}

	System.out.println(ans);

    }
}
