//Referred Professors code
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;
 
public class Main {
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine());
        int N = Integer.parseInt(st.nextToken());
        int M = Integer.parseInt(st.nextToken());
        int total = 0;
        int[] A = new int[N];
        st = new StringTokenizer(br.readLine());
        for(int i=0;i<N;i++){
            A[i] = Integer.parseInt(st.nextToken());
            total += A[i];
        }
        int count = 0;
        for(int i=0;i<N;i++){
            if (A[i] >= (total * 0.25/ M)){
                count++;
            }
        }
        System.out.println(count>=M?"Yes":"No");
        
    }
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io import java.util.StringTokenizer; StringTokenizer java.util public class Main {
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine());
        int N = Integer.parseInt(st.nextToken());
        int M = Integer.parseInt(st.nextToken());
        int total = 0;
        int[] A = new int[N];
        st = new StringTokenizer(br.readLine());
        for(int i=0;i<N;i++){
            A[i] = Integer.parseInt(st.nextToken());
            total += A[i];
        }
        int count = 0;
        for(int i=0;i<N;i++){
            if (A[i] >= (total * 0.25/ M)){
                count++;
            }
        }
        System.out.println(count>=M?"Yes":"No");
        
    }
} Main public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine());
        int N = Integer.parseInt(st.nextToken());
        int M = Integer.parseInt(st.nextToken());
        int total = 0;
        int[] A = new int[N];
        st = new StringTokenizer(br.readLine());
        for(int i=0;i<N;i++){
            A[i] = Integer.parseInt(st.nextToken());
            total += A[i];
        }
        int count = 0;
        for(int i=0;i<N;i++){
            if (A[i] >= (total * 0.25/ M)){
                count++;
            }
        }
        System.out.println(count>=M?"Yes":"No");
        
    } main {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine());
        int N = Integer.parseInt(st.nextToken());
        int M = Integer.parseInt(st.nextToken());
        int total = 0;
        int[] A = new int[N];
        st = new StringTokenizer(br.readLine());
        for(int i=0;i<N;i++){
            A[i] = Integer.parseInt(st.nextToken());
            total += A[i];
        }
        int count = 0;
        for(int i=0;i<N;i++){
            if (A[i] >= (total * 0.25/ M)){
                count++;
            }
        }
        System.out.println(count>=M?"Yes":"No");
        
    } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) StringTokenizer st = new StringTokenizer(br.readLine()); st new StringTokenizer(br.readLine()) int N = Integer.parseInt(st.nextToken()); N Integer.parseInt(st.nextToken()) Integer.parseInt Integer st.nextToken() st.nextToken st int M = Integer.parseInt(st.nextToken()); M Integer.parseInt(st.nextToken()) Integer.parseInt Integer st.nextToken() st.nextToken st int total = 0; total 0 int[] A = new int[N]; A new int[N] N st = new StringTokenizer(br.readLine()) st new StringTokenizer(br.readLine()) for(int i=0;i<N;i++){
            A[i] = Integer.parseInt(st.nextToken());
            total += A[i];
        } int i=0; int i=0; i 0 i<N i N i++ i++ i {
            A[i] = Integer.parseInt(st.nextToken());
            total += A[i];
        } {
            A[i] = Integer.parseInt(st.nextToken());
            total += A[i];
        } A[i] = Integer.parseInt(st.nextToken()) A[i] A i Integer.parseInt(st.nextToken()) Integer.parseInt Integer st.nextToken() st.nextToken st total += A[i] total A[i] A i int count = 0; count 0 for(int i=0;i<N;i++){
            if (A[i] >= (total * 0.25/ M)){
                count++;
            }
        } int i=0; int i=0; i 0 i<N i N i++ i++ i {
            if (A[i] >= (total * 0.25/ M)){
                count++;
            }
        } {
            if (A[i] >= (total * 0.25/ M)){
                count++;
            }
        } if (A[i] >= (total * 0.25/ M)){
                count++;
            } A[i] >= (total * 0.25/ M) A[i] A i (total * 0.25/ M) total * 0.25 total 0.25 M {
                count++;
            } count++ count System.out.println(count>=M?"Yes":"No") System.out.println System.out System System.out count>=M?"Yes":"No" count>=M count M "Yes" "No" String[] args args public class Main {
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine());
        int N = Integer.parseInt(st.nextToken());
        int M = Integer.parseInt(st.nextToken());
        int total = 0;
        int[] A = new int[N];
        st = new StringTokenizer(br.readLine());
        for(int i=0;i<N;i++){
            A[i] = Integer.parseInt(st.nextToken());
            total += A[i];
        }
        int count = 0;
        for(int i=0;i<N;i++){
            if (A[i] >= (total * 0.25/ M)){
                count++;
            }
        }
        System.out.println(count>=M?"Yes":"No");
        
    }
} public class Main {
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine());
        int N = Integer.parseInt(st.nextToken());
        int M = Integer.parseInt(st.nextToken());
        int total = 0;
        int[] A = new int[N];
        st = new StringTokenizer(br.readLine());
        for(int i=0;i<N;i++){
            A[i] = Integer.parseInt(st.nextToken());
            total += A[i];
        }
        int count = 0;
        for(int i=0;i<N;i++){
            if (A[i] >= (total * 0.25/ M)){
                count++;
            }
        }
        System.out.println(count>=M?"Yes":"No");
        
    }
} Main
//Referred Professors code
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;
 
public class Main {
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine());
        int N = Integer.parseInt(st.nextToken());
        int M = Integer.parseInt(st.nextToken());
        int total = 0;
        int[] A = new int[N];
        st = new StringTokenizer(br.readLine());
        for(int i=0;i<N;i++){
            A[i] = Integer.parseInt(st.nextToken());
            total += A[i];
        }
        int count = 0;
        for(int i=0;i<N;i++){
            if (A[i] >= (total * 0.25/ M)){
                count++;
            }
        }
        System.out.println(count>=M?"Yes":"No");
        
    }
}