import 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();
    double sum = 0;
    ArrayList<Integer> list = new ArrayList<Integer>();
    int count = 0;
    String ans;
    for (int i=0; i<N; i++) {
      int num = sc.nextInt();
      list.add(num);
      sum += num;
    }
    
    Collections.sort(list,Collections.reverseOrder());

    for (int i=0; i<N; i++) {
      if (list.get(i) < sum/(4*M)) {
        count = i;
        break;
      } else if (i == N-1) {
        count = N;
        break;
      }
    }
    if (count >= M)
      ans = "Yes";
    else
      ans = "No";
    
    System.out.println(ans);
  }
}   import java.util.*; util.* java public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int M = sc.nextInt();
    double sum = 0;
    ArrayList<Integer> list = new ArrayList<Integer>();
    int count = 0;
    String ans;
    for (int i=0; i<N; i++) {
      int num = sc.nextInt();
      list.add(num);
      sum += num;
    }
    
    Collections.sort(list,Collections.reverseOrder());

    for (int i=0; i<N; i++) {
      if (list.get(i) < sum/(4*M)) {
        count = i;
        break;
      } else if (i == N-1) {
        count = N;
        break;
      }
    }
    if (count >= M)
      ans = "Yes";
    else
      ans = "No";
    
    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();
    double sum = 0;
    ArrayList<Integer> list = new ArrayList<Integer>();
    int count = 0;
    String ans;
    for (int i=0; i<N; i++) {
      int num = sc.nextInt();
      list.add(num);
      sum += num;
    }
    
    Collections.sort(list,Collections.reverseOrder());

    for (int i=0; i<N; i++) {
      if (list.get(i) < sum/(4*M)) {
        count = i;
        break;
      } else if (i == N-1) {
        count = N;
        break;
      }
    }
    if (count >= M)
      ans = "Yes";
    else
      ans = "No";
    
    System.out.println(ans);
  } main {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int M = sc.nextInt();
    double sum = 0;
    ArrayList<Integer> list = new ArrayList<Integer>();
    int count = 0;
    String ans;
    for (int i=0; i<N; i++) {
      int num = sc.nextInt();
      list.add(num);
      sum += num;
    }
    
    Collections.sort(list,Collections.reverseOrder());

    for (int i=0; i<N; i++) {
      if (list.get(i) < sum/(4*M)) {
        count = i;
        break;
      } else if (i == N-1) {
        count = N;
        break;
      }
    }
    if (count >= M)
      ans = "Yes";
    else
      ans = "No";
    
    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 double sum = 0; sum 0 ArrayList<Integer> list = new ArrayList<Integer>(); list new ArrayList<Integer>() int count = 0; count 0 String ans; ans for (int i=0; i<N; i++) {
      int num = sc.nextInt();
      list.add(num);
      sum += num;
    } int i=0; int i=0; i 0 i<N i N i++ i++ i {
      int num = sc.nextInt();
      list.add(num);
      sum += num;
    } {
      int num = sc.nextInt();
      list.add(num);
      sum += num;
    } int num = sc.nextInt(); num sc.nextInt() sc.nextInt sc list.add(num) list.add list num sum += num sum num Collections.sort(list,Collections.reverseOrder()) Collections.sort Collections list Collections.reverseOrder() Collections.reverseOrder Collections for (int i=0; i<N; i++) {
      if (list.get(i) < sum/(4*M)) {
        count = i;
        break;
      } else if (i == N-1) {
        count = N;
        break;
      }
    } int i=0; int i=0; i 0 i<N i N i++ i++ i {
      if (list.get(i) < sum/(4*M)) {
        count = i;
        break;
      } else if (i == N-1) {
        count = N;
        break;
      }
    } {
      if (list.get(i) < sum/(4*M)) {
        count = i;
        break;
      } else if (i == N-1) {
        count = N;
        break;
      }
    } if (list.get(i) < sum/(4*M)) {
        count = i;
        break;
      } else if (i == N-1) {
        count = N;
        break;
      } list.get(i) < sum/(4*M) list.get(i) list.get list i sum/(4*M) sum (4*M) 4 M {
        count = i;
        break;
      } count = i count i break; if (i == N-1) {
        count = N;
        break;
      } i == N-1 i N-1 N 1 {
        count = N;
        break;
      } count = N count N break; if (count >= M)
      ans = "Yes";
    else
      ans = "No"; count >= M count M ans = "Yes" ans "Yes" ans = "No" ans "No" 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();
    double sum = 0;
    ArrayList<Integer> list = new ArrayList<Integer>();
    int count = 0;
    String ans;
    for (int i=0; i<N; i++) {
      int num = sc.nextInt();
      list.add(num);
      sum += num;
    }
    
    Collections.sort(list,Collections.reverseOrder());

    for (int i=0; i<N; i++) {
      if (list.get(i) < sum/(4*M)) {
        count = i;
        break;
      } else if (i == N-1) {
        count = N;
        break;
      }
    }
    if (count >= M)
      ans = "Yes";
    else
      ans = "No";
    
    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();
    double sum = 0;
    ArrayList<Integer> list = new ArrayList<Integer>();
    int count = 0;
    String ans;
    for (int i=0; i<N; i++) {
      int num = sc.nextInt();
      list.add(num);
      sum += num;
    }
    
    Collections.sort(list,Collections.reverseOrder());

    for (int i=0; i<N; i++) {
      if (list.get(i) < sum/(4*M)) {
        count = i;
        break;
      } else if (i == N-1) {
        count = N;
        break;
      }
    }
    if (count >= M)
      ans = "Yes";
    else
      ans = "No";
    
    System.out.println(ans);
  }
} Main
import 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();
    double sum = 0;
    ArrayList<Integer> list = new ArrayList<Integer>();
    int count = 0;
    String ans;
    for (int i=0; i<N; i++) {
      int num = sc.nextInt();
      list.add(num);
      sum += num;
    }
    
    Collections.sort(list,Collections.reverseOrder());

    for (int i=0; i<N; i++) {
      if (list.get(i) < sum/(4*M)) {
        count = i;
        break;
      } else if (i == N-1) {
        count = N;
        break;
      }
    }
    if (count >= M)
      ans = "Yes";
    else
      ans = "No";
    
    System.out.println(ans);
  }
}  