
import java.util.Scanner;

class Main {
	public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int[] A = new int[N];
        int count = 0;
        int sumA = 0;
        for(int i = 0; i < N; i++) {
        	A[i] = sc.nextInt();
        	sumA += A[i];
        }
        sc.close();
        
        
        for(int i = 0; i < N; i++) {
        	if((double)A[i] >= (double)sumA / (4 * M)) {
        		count ++;
        	}
        }
        
        
        if(count >= M)
        System.out.println("Yes");
        else
        System.out.println("No");



        
        }
	} import java.util.Scanner; Scanner java.util class Main {
	public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int[] A = new int[N];
        int count = 0;
        int sumA = 0;
        for(int i = 0; i < N; i++) {
        	A[i] = sc.nextInt();
        	sumA += A[i];
        }
        sc.close();
        
        
        for(int i = 0; i < N; i++) {
        	if((double)A[i] >= (double)sumA / (4 * M)) {
        		count ++;
        	}
        }
        
        
        if(count >= M)
        System.out.println("Yes");
        else
        System.out.println("No");



        
        }
	} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int[] A = new int[N];
        int count = 0;
        int sumA = 0;
        for(int i = 0; i < N; i++) {
        	A[i] = sc.nextInt();
        	sumA += A[i];
        }
        sc.close();
        
        
        for(int i = 0; i < N; i++) {
        	if((double)A[i] >= (double)sumA / (4 * M)) {
        		count ++;
        	}
        }
        
        
        if(count >= M)
        System.out.println("Yes");
        else
        System.out.println("No");



        
        } main {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int[] A = new int[N];
        int count = 0;
        int sumA = 0;
        for(int i = 0; i < N; i++) {
        	A[i] = sc.nextInt();
        	sumA += A[i];
        }
        sc.close();
        
        
        for(int i = 0; i < N; i++) {
        	if((double)A[i] >= (double)sumA / (4 * M)) {
        		count ++;
        	}
        }
        
        
        if(count >= M)
        System.out.println("Yes");
        else
        System.out.println("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[] A = new int[N]; A new int[N] N int count = 0; count 0 int sumA = 0; sumA 0 for(int i = 0; i < N; i++) {
        	A[i] = sc.nextInt();
        	sumA += A[i];
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
        	A[i] = sc.nextInt();
        	sumA += A[i];
        } {
        	A[i] = sc.nextInt();
        	sumA += A[i];
        } A[i] = sc.nextInt() A[i] A i sc.nextInt() sc.nextInt sc sumA += A[i] sumA A[i] A i sc.close() sc.close sc for(int i = 0; i < N; i++) {
        	if((double)A[i] >= (double)sumA / (4 * M)) {
        		count ++;
        	}
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
        	if((double)A[i] >= (double)sumA / (4 * M)) {
        		count ++;
        	}
        } {
        	if((double)A[i] >= (double)sumA / (4 * M)) {
        		count ++;
        	}
        } if((double)A[i] >= (double)sumA / (4 * M)) {
        		count ++;
        	} (double)A[i] >= (double)sumA / (4 * M) (double)A[i] A i (double)sumA / (4 * M) (double)sumA (4 * M) 4 M {
        		count ++;
        	} count ++ count if(count >= M)
        System.out.println("Yes");
        else
        System.out.println("No"); count >= M count M System.out.println("Yes") System.out.println System.out System System.out "Yes" System.out.println("No") System.out.println System.out System System.out "No" String[] args args

import java.util.Scanner;

class Main {
	public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int[] A = new int[N];
        int count = 0;
        int sumA = 0;
        for(int i = 0; i < N; i++) {
        	A[i] = sc.nextInt();
        	sumA += A[i];
        }
        sc.close();
        
        
        for(int i = 0; i < N; i++) {
        	if((double)A[i] >= (double)sumA / (4 * M)) {
        		count ++;
        	}
        }
        
        
        if(count >= M)
        System.out.println("Yes");
        else
        System.out.println("No");



        
        }
	}
