import java.util.*;

public class Main {
  public static void main(String[] args ) throws Exception {
    Scanner sc = new Scanner(System.in);

    int N = sc.nextInt();
    int M = sc.nextInt();
    int total = 0;
    int count = 0;

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

    int N = sc.nextInt();
    int M = sc.nextInt();
    int total = 0;
    int count = 0;

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

    int N = sc.nextInt();
    int M = sc.nextInt();
    int total = 0;
    int count = 0;

    int[] S = new int[N];
    
    for(int i = 0; i < N; i++) {
        int token = sc.nextInt();
        S[i] = token;
        total += token;
    }
    
    for(int i = 0; i < N; i++) {
        if( S[i] * 4 * M >= total) 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 total = 0;
    int count = 0;

    int[] S = new int[N];
    
    for(int i = 0; i < N; i++) {
        int token = sc.nextInt();
        S[i] = token;
        total += token;
    }
    
    for(int i = 0; i < N; i++) {
        if( S[i] * 4 * M >= total) 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 total = 0; total 0 int count = 0; count 0 int[] S = new int[N]; S new int[N] N for(int i = 0; i < N; i++) {
        int token = sc.nextInt();
        S[i] = token;
        total += token;
    } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
        int token = sc.nextInt();
        S[i] = token;
        total += token;
    } {
        int token = sc.nextInt();
        S[i] = token;
        total += token;
    } int token = sc.nextInt(); token sc.nextInt() sc.nextInt sc S[i] = token S[i] S i token total += token total token for(int i = 0; i < N; i++) {
        if( S[i] * 4 * M >= total) count++;
    } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
        if( S[i] * 4 * M >= total) count++;
    } {
        if( S[i] * 4 * M >= total) count++;
    } if( S[i] * 4 * M >= total) count++; S[i] * 4 * M >= total S[i] * 4 * M S[i] * 4 * M S[i] S i 4 M total 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 public class Main {
  public static void main(String[] args ) throws Exception {
    Scanner sc = new Scanner(System.in);

    int N = sc.nextInt();
    int M = sc.nextInt();
    int total = 0;
    int count = 0;

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

    int N = sc.nextInt();
    int M = sc.nextInt();
    int total = 0;
    int count = 0;

    int[] S = new int[N];
    
    for(int i = 0; i < N; i++) {
        int token = sc.nextInt();
        S[i] = token;
        total += token;
    }
    
    for(int i = 0; i < N; i++) {
        if( S[i] * 4 * M >= total) count++;
    }
    
    
    if(count >= M) {
        System.out.println("Yes");
    }else {
        System.out.println("No");
    }
  }
} Main
import java.util.*;

public class Main {
  public static void main(String[] args ) throws Exception {
    Scanner sc = new Scanner(System.in);

    int N = sc.nextInt();
    int M = sc.nextInt();
    int total = 0;
    int count = 0;

    int[] S = new int[N];
    
    for(int i = 0; i < N; i++) {
        int token = sc.nextInt();
        S[i] = token;
        total += token;
    }
    
    for(int i = 0; i < N; i++) {
        if( S[i] * 4 * M >= total) count++;
    }
    
    
    if(count >= M) {
        System.out.println("Yes");
    }else {
        System.out.println("No");
    }
  }
}
