import java.util.Scanner;
public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt(); //N種類の商品
    int M = sc.nextInt(); //M個を選ぶ
    int[] A = new int[N]; //得票数
    int sum = 0; //総投票数
    int cnt = 0; //許容選択数
    String S = ""; //空
    
      for(int i=0; i<N; i++) { //商品 i
        A[i]=sc.nextInt(); 
        sum += A[i];
      }
      for(int i=0; i<N; i++){
        if(A[i]*4*M >= sum){
          cnt++;
        } 
      }
      if(cnt>=M) {
        S="Yes";
      } else {
        S="No";
      }
    System.out.println(S);
  }
} 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(); //N種類の商品
    int M = sc.nextInt(); //M個を選ぶ
    int[] A = new int[N]; //得票数
    int sum = 0; //総投票数
    int cnt = 0; //許容選択数
    String S = ""; //空
    
      for(int i=0; i<N; i++) { //商品 i
        A[i]=sc.nextInt(); 
        sum += A[i];
      }
      for(int i=0; i<N; i++){
        if(A[i]*4*M >= sum){
          cnt++;
        } 
      }
      if(cnt>=M) {
        S="Yes";
      } else {
        S="No";
      }
    System.out.println(S);
  }
} Main public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt(); //N種類の商品
    int M = sc.nextInt(); //M個を選ぶ
    int[] A = new int[N]; //得票数
    int sum = 0; //総投票数
    int cnt = 0; //許容選択数
    String S = ""; //空
    
      for(int i=0; i<N; i++) { //商品 i
        A[i]=sc.nextInt(); 
        sum += A[i];
      }
      for(int i=0; i<N; i++){
        if(A[i]*4*M >= sum){
          cnt++;
        } 
      }
      if(cnt>=M) {
        S="Yes";
      } else {
        S="No";
      }
    System.out.println(S);
  } main {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt(); //N種類の商品
    int M = sc.nextInt(); //M個を選ぶ
    int[] A = new int[N]; //得票数
    int sum = 0; //総投票数
    int cnt = 0; //許容選択数
    String S = ""; //空
    
      for(int i=0; i<N; i++) { //商品 i
        A[i]=sc.nextInt(); 
        sum += A[i];
      }
      for(int i=0; i<N; i++){
        if(A[i]*4*M >= sum){
          cnt++;
        } 
      }
      if(cnt>=M) {
        S="Yes";
      } else {
        S="No";
      }
    System.out.println(S);
  } 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 sum = 0; sum 0 int cnt = 0; cnt 0 String S = ""; S "" for(int i=0; i<N; i++) { //商品 i
        A[i]=sc.nextInt(); 
        sum += A[i];
      } int i=0; int i=0; i 0 i<N i N i++ i++ i { //商品 i
        A[i]=sc.nextInt(); 
        sum += A[i];
      } { //商品 i
        A[i]=sc.nextInt(); 
        sum += A[i];
      } A[i]=sc.nextInt() A[i] A i sc.nextInt() sc.nextInt sc sum += A[i] sum A[i] A i for(int i=0; i<N; i++){
        if(A[i]*4*M >= sum){
          cnt++;
        } 
      } int i=0; int i=0; i 0 i<N i N i++ i++ i {
        if(A[i]*4*M >= sum){
          cnt++;
        } 
      } {
        if(A[i]*4*M >= sum){
          cnt++;
        } 
      } if(A[i]*4*M >= sum){
          cnt++;
        } A[i]*4*M >= sum A[i]*4*M A[i]*4*M A[i] A i 4 M sum {
          cnt++;
        } cnt++ cnt if(cnt>=M) {
        S="Yes";
      } else {
        S="No";
      } cnt>=M cnt M {
        S="Yes";
      } S="Yes" S "Yes" {
        S="No";
      } S="No" S "No" System.out.println(S) System.out.println System.out System System.out S String[] args args public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt(); //N種類の商品
    int M = sc.nextInt(); //M個を選ぶ
    int[] A = new int[N]; //得票数
    int sum = 0; //総投票数
    int cnt = 0; //許容選択数
    String S = ""; //空
    
      for(int i=0; i<N; i++) { //商品 i
        A[i]=sc.nextInt(); 
        sum += A[i];
      }
      for(int i=0; i<N; i++){
        if(A[i]*4*M >= sum){
          cnt++;
        } 
      }
      if(cnt>=M) {
        S="Yes";
      } else {
        S="No";
      }
    System.out.println(S);
  }
} public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt(); //N種類の商品
    int M = sc.nextInt(); //M個を選ぶ
    int[] A = new int[N]; //得票数
    int sum = 0; //総投票数
    int cnt = 0; //許容選択数
    String S = ""; //空
    
      for(int i=0; i<N; i++) { //商品 i
        A[i]=sc.nextInt(); 
        sum += A[i];
      }
      for(int i=0; i<N; i++){
        if(A[i]*4*M >= sum){
          cnt++;
        } 
      }
      if(cnt>=M) {
        S="Yes";
      } else {
        S="No";
      }
    System.out.println(S);
  }
} Main
import java.util.Scanner;
public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt(); //N種類の商品
    int M = sc.nextInt(); //M個を選ぶ
    int[] A = new int[N]; //得票数
    int sum = 0; //総投票数
    int cnt = 0; //許容選択数
    String S = ""; //空
    
      for(int i=0; i<N; i++) { //商品 i
        A[i]=sc.nextInt(); 
        sum += A[i];
      }
      for(int i=0; i<N; i++){
        if(A[i]*4*M >= sum){
          cnt++;
        } 
      }
      if(cnt>=M) {
        S="Yes";
      } else {
        S="No";
      }
    System.out.println(S);
  }
}