import java.util.Scanner;

class Main{
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    int n = scan.nextInt();
    int m = scan.nextInt();
    int sum = 0;
    int count = 0;
    int[] pop = new int[n];
    for(int i = 0; i < n; i++){
      pop[i] = scan.nextInt();
    }
    for(int i = 0; i < n; i++){
      sum += pop[i];
    }
    int M = 4*m;
    //double border = sum/M;
    for(int i = 0; i<n; i++){
      if(pop[i]*M >= sum){
        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 scan = new Scanner(System.in);
    int n = scan.nextInt();
    int m = scan.nextInt();
    int sum = 0;
    int count = 0;
    int[] pop = new int[n];
    for(int i = 0; i < n; i++){
      pop[i] = scan.nextInt();
    }
    for(int i = 0; i < n; i++){
      sum += pop[i];
    }
    int M = 4*m;
    //double border = sum/M;
    for(int i = 0; i<n; i++){
      if(pop[i]*M >= sum){
        count++;
      }
    }
     if(count >= m){
       System.out.println("Yes");
     }else{
       System.out.println("No");
     }
  }
} Main public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    int n = scan.nextInt();
    int m = scan.nextInt();
    int sum = 0;
    int count = 0;
    int[] pop = new int[n];
    for(int i = 0; i < n; i++){
      pop[i] = scan.nextInt();
    }
    for(int i = 0; i < n; i++){
      sum += pop[i];
    }
    int M = 4*m;
    //double border = sum/M;
    for(int i = 0; i<n; i++){
      if(pop[i]*M >= sum){
        count++;
      }
    }
     if(count >= m){
       System.out.println("Yes");
     }else{
       System.out.println("No");
     }
  } main {
    Scanner scan = new Scanner(System.in);
    int n = scan.nextInt();
    int m = scan.nextInt();
    int sum = 0;
    int count = 0;
    int[] pop = new int[n];
    for(int i = 0; i < n; i++){
      pop[i] = scan.nextInt();
    }
    for(int i = 0; i < n; i++){
      sum += pop[i];
    }
    int M = 4*m;
    //double border = sum/M;
    for(int i = 0; i<n; i++){
      if(pop[i]*M >= sum){
        count++;
      }
    }
     if(count >= m){
       System.out.println("Yes");
     }else{
       System.out.println("No");
     }
  } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int n = scan.nextInt(); n scan.nextInt() scan.nextInt scan int m = scan.nextInt(); m scan.nextInt() scan.nextInt scan int sum = 0; sum 0 int count = 0; count 0 int[] pop = new int[n]; pop new int[n] n for(int i = 0; i < n; i++){
      pop[i] = scan.nextInt();
    } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
      pop[i] = scan.nextInt();
    } {
      pop[i] = scan.nextInt();
    } pop[i] = scan.nextInt() pop[i] pop i scan.nextInt() scan.nextInt scan for(int i = 0; i < n; i++){
      sum += pop[i];
    } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
      sum += pop[i];
    } {
      sum += pop[i];
    } sum += pop[i] sum pop[i] pop i int M = 4*m; M 4*m 4 m for(int i = 0; i<n; i++){
      if(pop[i]*M >= sum){
        count++;
      }
    } int i = 0; int i = 0; i 0 i<n i n i++ i++ i {
      if(pop[i]*M >= sum){
        count++;
      }
    } {
      if(pop[i]*M >= sum){
        count++;
      }
    } if(pop[i]*M >= sum){
        count++;
      } pop[i]*M >= sum pop[i]*M pop[i] pop i M sum {
        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("Yes") System.out.println System.out System System.out "Yes" {
       System.out.println("No");
     } 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 scan = new Scanner(System.in);
    int n = scan.nextInt();
    int m = scan.nextInt();
    int sum = 0;
    int count = 0;
    int[] pop = new int[n];
    for(int i = 0; i < n; i++){
      pop[i] = scan.nextInt();
    }
    for(int i = 0; i < n; i++){
      sum += pop[i];
    }
    int M = 4*m;
    //double border = sum/M;
    for(int i = 0; i<n; i++){
      if(pop[i]*M >= sum){
        count++;
      }
    }
     if(count >= m){
       System.out.println("Yes");
     }else{
       System.out.println("No");
     }
  }
}
