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();
    int[] As = new int[N];
    int total = 0;
    long count = 0;
    for (int i = 0; i < N; i++) {
    	As[i] = sc.nextInt();
    	total += As[i];
    }
    for (int i = 0; i < N; i++) {
    	if(total <= (As[i] * 4 * M)) count++;
    }
    System.out.println(M <= count ? "Yes" : "No");
  }
} 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();
    int[] As = new int[N];
    int total = 0;
    long count = 0;
    for (int i = 0; i < N; i++) {
    	As[i] = sc.nextInt();
    	total += As[i];
    }
    for (int i = 0; i < N; i++) {
    	if(total <= (As[i] * 4 * M)) count++;
    }
    System.out.println(M <= count ? "Yes" : "No");
  }
} Main public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int M = sc.nextInt();
    int[] As = new int[N];
    int total = 0;
    long count = 0;
    for (int i = 0; i < N; i++) {
    	As[i] = sc.nextInt();
    	total += As[i];
    }
    for (int i = 0; i < N; i++) {
    	if(total <= (As[i] * 4 * M)) count++;
    }
    System.out.println(M <= count ? "Yes" : "No");
  } main {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int M = sc.nextInt();
    int[] As = new int[N];
    int total = 0;
    long count = 0;
    for (int i = 0; i < N; i++) {
    	As[i] = sc.nextInt();
    	total += As[i];
    }
    for (int i = 0; i < N; i++) {
    	if(total <= (As[i] * 4 * M)) count++;
    }
    System.out.println(M <= count ? "Yes" : "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[] As = new int[N]; As new int[N] N int total = 0; total 0 long count = 0; count 0 for (int i = 0; i < N; i++) {
    	As[i] = sc.nextInt();
    	total += As[i];
    } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
    	As[i] = sc.nextInt();
    	total += As[i];
    } {
    	As[i] = sc.nextInt();
    	total += As[i];
    } As[i] = sc.nextInt() As[i] As i sc.nextInt() sc.nextInt sc total += As[i] total As[i] As i for (int i = 0; i < N; i++) {
    	if(total <= (As[i] * 4 * M)) count++;
    } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
    	if(total <= (As[i] * 4 * M)) count++;
    } {
    	if(total <= (As[i] * 4 * M)) count++;
    } if(total <= (As[i] * 4 * M)) count++; total <= (As[i] * 4 * M) total (As[i] * 4 * M) As[i] * 4 * M As[i] As i 4 M count++ count System.out.println(M <= count ? "Yes" : "No") System.out.println System.out System System.out M <= count ? "Yes" : "No" M <= count M count "Yes" "No" 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();
    int[] As = new int[N];
    int total = 0;
    long count = 0;
    for (int i = 0; i < N; i++) {
    	As[i] = sc.nextInt();
    	total += As[i];
    }
    for (int i = 0; i < N; i++) {
    	if(total <= (As[i] * 4 * M)) count++;
    }
    System.out.println(M <= count ? "Yes" : "No");
  }
} public class Main {
 
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int M = sc.nextInt();
    int[] As = new int[N];
    int total = 0;
    long count = 0;
    for (int i = 0; i < N; i++) {
    	As[i] = sc.nextInt();
    	total += As[i];
    }
    for (int i = 0; i < N; i++) {
    	if(total <= (As[i] * 4 * M)) count++;
    }
    System.out.println(M <= count ? "Yes" : "No");
  }
} 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();
    int[] As = new int[N];
    int total = 0;
    long count = 0;
    for (int i = 0; i < N; i++) {
    	As[i] = sc.nextInt();
    	total += As[i];
    }
    for (int i = 0; i < N; i++) {
    	if(total <= (As[i] * 4 * M)) count++;
    }
    System.out.println(M <= count ? "Yes" : "No");
  }
}
