import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int[] A = new int[N];
        int sum = 0;
        for(int i=0; i<N; i++) {
            A[i] = sc.nextInt();
            sum += A[i];
        }
        float check = (float)sum / (4 * M);
        int count = 0;

        for(int i=0; i < N; i++) {
            
            if(A[i] >= check) count++;
        }

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

        for(int i=0; i < N; i++) {
            
            if(A[i] >= check) count++;
        }

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

        for(int i=0; i < N; i++) {
            
            if(A[i] >= check) 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[] A = new int[N];
        int sum = 0;
        for(int i=0; i<N; i++) {
            A[i] = sc.nextInt();
            sum += A[i];
        }
        float check = (float)sum / (4 * M);
        int count = 0;

        for(int i=0; i < N; i++) {
            
            if(A[i] >= check) 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[] A = new int[N]; A new int[N] N int sum = 0; sum 0 for(int i=0; i<N; i++) {
            A[i] = sc.nextInt();
            sum += A[i];
        } int i=0; int i=0; i 0 i<N i N i++ i++ i {
            A[i] = sc.nextInt();
            sum += A[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 float check = (float)sum / (4 * M); check (float)sum / (4 * M) (float)sum (4 * M) 4 M int count = 0; count 0 for(int i=0; i < N; i++) {
            
            if(A[i] >= check) count++;
        } int i=0; int i=0; i 0 i < N i N i++ i++ i {
            
            if(A[i] >= check) count++;
        } {
            
            if(A[i] >= check) count++;
        } if(A[i] >= check) count++; A[i] >= check A[i] A i check 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 System.out System System.out "Yes" System.out.println("No") System.out.println System.out System System.out "No" String[] args args
import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int[] A = new int[N];
        int sum = 0;
        for(int i=0; i<N; i++) {
            A[i] = sc.nextInt();
            sum += A[i];
        }
        float check = (float)sum / (4 * M);
        int count = 0;

        for(int i=0; i < N; i++) {
            
            if(A[i] >= check) count++;
        }

        if(count >= M) System.out.println("Yes");
        else System.out.println("No");       
    }
}