import java.util.*;

public class Main {
    public static void main(String[] args)
    {
        Scanner scanner = new Scanner(System.in);
        int N = scanner.nextInt();
        int M = scanner.nextInt();
        int[] arr = new int[N];
        double sum = 0;
        for(int i=0;i<N;i++)
        {
            arr[i] = scanner.nextInt();
            sum += arr[i];
        }
        Arrays.sort(arr);
        boolean answer = false;
        int count = 0;
        for(int i=N-1;i>=0;i--)
        {
            if(arr[i] >= sum/(4*M))
                count++;
            if(count == M)
            {
                answer = true;
                break;
            }
        }
        if(answer)
            System.out.println("Yes");
        else
            System.out.println("No");
//        System.out.println(Arrays.toString(arr));
//        if(arr[N-M] >= sum/(4*M))
//            System.out.println("YES");
//        else
//            System.out.println("NO");
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args)
    {
        Scanner scanner = new Scanner(System.in);
        int N = scanner.nextInt();
        int M = scanner.nextInt();
        int[] arr = new int[N];
        double sum = 0;
        for(int i=0;i<N;i++)
        {
            arr[i] = scanner.nextInt();
            sum += arr[i];
        }
        Arrays.sort(arr);
        boolean answer = false;
        int count = 0;
        for(int i=N-1;i>=0;i--)
        {
            if(arr[i] >= sum/(4*M))
                count++;
            if(count == M)
            {
                answer = true;
                break;
            }
        }
        if(answer)
            System.out.println("Yes");
        else
            System.out.println("No");
//        System.out.println(Arrays.toString(arr));
//        if(arr[N-M] >= sum/(4*M))
//            System.out.println("YES");
//        else
//            System.out.println("NO");
    }
} Main public static void main(String[] args)
    {
        Scanner scanner = new Scanner(System.in);
        int N = scanner.nextInt();
        int M = scanner.nextInt();
        int[] arr = new int[N];
        double sum = 0;
        for(int i=0;i<N;i++)
        {
            arr[i] = scanner.nextInt();
            sum += arr[i];
        }
        Arrays.sort(arr);
        boolean answer = false;
        int count = 0;
        for(int i=N-1;i>=0;i--)
        {
            if(arr[i] >= sum/(4*M))
                count++;
            if(count == M)
            {
                answer = true;
                break;
            }
        }
        if(answer)
            System.out.println("Yes");
        else
            System.out.println("No");
//        System.out.println(Arrays.toString(arr));
//        if(arr[N-M] >= sum/(4*M))
//            System.out.println("YES");
//        else
//            System.out.println("NO");
    } main {
        Scanner scanner = new Scanner(System.in);
        int N = scanner.nextInt();
        int M = scanner.nextInt();
        int[] arr = new int[N];
        double sum = 0;
        for(int i=0;i<N;i++)
        {
            arr[i] = scanner.nextInt();
            sum += arr[i];
        }
        Arrays.sort(arr);
        boolean answer = false;
        int count = 0;
        for(int i=N-1;i>=0;i--)
        {
            if(arr[i] >= sum/(4*M))
                count++;
            if(count == M)
            {
                answer = true;
                break;
            }
        }
        if(answer)
            System.out.println("Yes");
        else
            System.out.println("No");
//        System.out.println(Arrays.toString(arr));
//        if(arr[N-M] >= sum/(4*M))
//            System.out.println("YES");
//        else
//            System.out.println("NO");
    } Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) int N = scanner.nextInt(); N scanner.nextInt() scanner.nextInt scanner int M = scanner.nextInt(); M scanner.nextInt() scanner.nextInt scanner int[] arr = new int[N]; arr new int[N] N double sum = 0; sum 0 for(int i=0;i<N;i++)
        {
            arr[i] = scanner.nextInt();
            sum += arr[i];
        } int i=0; int i=0; i 0 i<N i N i++ i++ i {
            arr[i] = scanner.nextInt();
            sum += arr[i];
        } {
            arr[i] = scanner.nextInt();
            sum += arr[i];
        } arr[i] = scanner.nextInt() arr[i] arr i scanner.nextInt() scanner.nextInt scanner sum += arr[i] sum arr[i] arr i Arrays.sort(arr) Arrays.sort Arrays arr boolean answer = false; answer false int count = 0; count 0 for(int i=N-1;i>=0;i--)
        {
            if(arr[i] >= sum/(4*M))
                count++;
            if(count == M)
            {
                answer = true;
                break;
            }
        } int i=N-1; int i=N-1; i N-1 N 1 i>=0 i 0 i-- i-- i {
            if(arr[i] >= sum/(4*M))
                count++;
            if(count == M)
            {
                answer = true;
                break;
            }
        } {
            if(arr[i] >= sum/(4*M))
                count++;
            if(count == M)
            {
                answer = true;
                break;
            }
        } if(arr[i] >= sum/(4*M))
                count++; arr[i] >= sum/(4*M) arr[i] arr i sum/(4*M) sum (4*M) 4 M count++ count if(count == M)
            {
                answer = true;
                break;
            } count == M count M {
                answer = true;
                break;
            } answer = true answer true break; if(answer)
            System.out.println("Yes");
        else
            System.out.println("No"); answer System.out.println("Yes") System.out.println System.out System System.out "Yes" 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)
    {
        Scanner scanner = new Scanner(System.in);
        int N = scanner.nextInt();
        int M = scanner.nextInt();
        int[] arr = new int[N];
        double sum = 0;
        for(int i=0;i<N;i++)
        {
            arr[i] = scanner.nextInt();
            sum += arr[i];
        }
        Arrays.sort(arr);
        boolean answer = false;
        int count = 0;
        for(int i=N-1;i>=0;i--)
        {
            if(arr[i] >= sum/(4*M))
                count++;
            if(count == M)
            {
                answer = true;
                break;
            }
        }
        if(answer)
            System.out.println("Yes");
        else
            System.out.println("No");
//        System.out.println(Arrays.toString(arr));
//        if(arr[N-M] >= sum/(4*M))
//            System.out.println("YES");
//        else
//            System.out.println("NO");
    }
} public class Main {
    public static void main(String[] args)
    {
        Scanner scanner = new Scanner(System.in);
        int N = scanner.nextInt();
        int M = scanner.nextInt();
        int[] arr = new int[N];
        double sum = 0;
        for(int i=0;i<N;i++)
        {
            arr[i] = scanner.nextInt();
            sum += arr[i];
        }
        Arrays.sort(arr);
        boolean answer = false;
        int count = 0;
        for(int i=N-1;i>=0;i--)
        {
            if(arr[i] >= sum/(4*M))
                count++;
            if(count == M)
            {
                answer = true;
                break;
            }
        }
        if(answer)
            System.out.println("Yes");
        else
            System.out.println("No");
//        System.out.println(Arrays.toString(arr));
//        if(arr[N-M] >= sum/(4*M))
//            System.out.println("YES");
//        else
//            System.out.println("NO");
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args)
    {
        Scanner scanner = new Scanner(System.in);
        int N = scanner.nextInt();
        int M = scanner.nextInt();
        int[] arr = new int[N];
        double sum = 0;
        for(int i=0;i<N;i++)
        {
            arr[i] = scanner.nextInt();
            sum += arr[i];
        }
        Arrays.sort(arr);
        boolean answer = false;
        int count = 0;
        for(int i=N-1;i>=0;i--)
        {
            if(arr[i] >= sum/(4*M))
                count++;
            if(count == M)
            {
                answer = true;
                break;
            }
        }
        if(answer)
            System.out.println("Yes");
        else
            System.out.println("No");
//        System.out.println(Arrays.toString(arr));
//        if(arr[N-M] >= sum/(4*M))
//            System.out.println("YES");
//        else
//            System.out.println("NO");
    }
}
