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[] arr = new int[N];
		int sum = 0, count = 0;
		st = new StringTokenizer(br.readLine());
		
		for(int i=0; i<N; i++) {
			arr[i] = Integer.parseInt(st.nextToken());
			sum += arr[i];
		}
		
		for(int i=0; i<N; i++) {
			if(arr[i] >= sum/(4.0 * M))
				count++;
		}
		
		StringBuilder sb = new StringBuilder();
		if(count >= M)
			sb.append("Yes\n");
		else
			sb.append("No\n");
		
		System.out.println(sb);
		
	}

} 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[] arr = new int[N];
		int sum = 0, count = 0;
		st = new StringTokenizer(br.readLine());
		
		for(int i=0; i<N; i++) {
			arr[i] = Integer.parseInt(st.nextToken());
			sum += arr[i];
		}
		
		for(int i=0; i<N; i++) {
			if(arr[i] >= sum/(4.0 * M))
				count++;
		}
		
		StringBuilder sb = new StringBuilder();
		if(count >= M)
			sb.append("Yes\n");
		else
			sb.append("No\n");
		
		System.out.println(sb);
		
	}

} 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[] arr = new int[N];
		int sum = 0, count = 0;
		st = new StringTokenizer(br.readLine());
		
		for(int i=0; i<N; i++) {
			arr[i] = Integer.parseInt(st.nextToken());
			sum += arr[i];
		}
		
		for(int i=0; i<N; i++) {
			if(arr[i] >= sum/(4.0 * M))
				count++;
		}
		
		StringBuilder sb = new StringBuilder();
		if(count >= M)
			sb.append("Yes\n");
		else
			sb.append("No\n");
		
		System.out.println(sb);
		
	} 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[] arr = new int[N];
		int sum = 0, count = 0;
		st = new StringTokenizer(br.readLine());
		
		for(int i=0; i<N; i++) {
			arr[i] = Integer.parseInt(st.nextToken());
			sum += arr[i];
		}
		
		for(int i=0; i<N; i++) {
			if(arr[i] >= sum/(4.0 * M))
				count++;
		}
		
		StringBuilder sb = new StringBuilder();
		if(count >= M)
			sb.append("Yes\n");
		else
			sb.append("No\n");
		
		System.out.println(sb);
		
	} 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[] arr = new int[N]; arr new int[N] N int sum = 0 sum 0 count = 0; count 0 st = new StringTokenizer(br.readLine()) st new StringTokenizer(br.readLine()) for(int i=0; i<N; i++) {
			arr[i] = Integer.parseInt(st.nextToken());
			sum += arr[i];
		} int i=0; int i=0; i 0 i<N i N i++ i++ i {
			arr[i] = Integer.parseInt(st.nextToken());
			sum += arr[i];
		} {
			arr[i] = Integer.parseInt(st.nextToken());
			sum += arr[i];
		} arr[i] = Integer.parseInt(st.nextToken()) arr[i] arr i Integer.parseInt(st.nextToken()) Integer.parseInt Integer st.nextToken() st.nextToken st sum += arr[i] sum arr[i] arr i for(int i=0; i<N; i++) {
			if(arr[i] >= sum/(4.0 * M))
				count++;
		} int i=0; int i=0; i 0 i<N i N i++ i++ i {
			if(arr[i] >= sum/(4.0 * M))
				count++;
		} {
			if(arr[i] >= sum/(4.0 * M))
				count++;
		} if(arr[i] >= sum/(4.0 * M))
				count++; arr[i] >= sum/(4.0 * M) arr[i] arr i sum/(4.0 * M) sum (4.0 * M) 4.0 M count++ count StringBuilder sb = new StringBuilder(); sb new StringBuilder() if(count >= M)
			sb.append("Yes\n");
		else
			sb.append("No\n"); count >= M count M sb.append("Yes\n") sb.append sb "Yes\n" sb.append("No\n") sb.append sb "No\n" System.out.println(sb) System.out.println System.out System System.out sb 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[] arr = new int[N];
		int sum = 0, count = 0;
		st = new StringTokenizer(br.readLine());
		
		for(int i=0; i<N; i++) {
			arr[i] = Integer.parseInt(st.nextToken());
			sum += arr[i];
		}
		
		for(int i=0; i<N; i++) {
			if(arr[i] >= sum/(4.0 * M))
				count++;
		}
		
		StringBuilder sb = new StringBuilder();
		if(count >= M)
			sb.append("Yes\n");
		else
			sb.append("No\n");
		
		System.out.println(sb);
		
	}

} 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[] arr = new int[N];
		int sum = 0, count = 0;
		st = new StringTokenizer(br.readLine());
		
		for(int i=0; i<N; i++) {
			arr[i] = Integer.parseInt(st.nextToken());
			sum += arr[i];
		}
		
		for(int i=0; i<N; i++) {
			if(arr[i] >= sum/(4.0 * M))
				count++;
		}
		
		StringBuilder sb = new StringBuilder();
		if(count >= M)
			sb.append("Yes\n");
		else
			sb.append("No\n");
		
		System.out.println(sb);
		
	}

} Main
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[] arr = new int[N];
		int sum = 0, count = 0;
		st = new StringTokenizer(br.readLine());
		
		for(int i=0; i<N; i++) {
			arr[i] = Integer.parseInt(st.nextToken());
			sum += arr[i];
		}
		
		for(int i=0; i<N; i++) {
			if(arr[i] >= sum/(4.0 * M))
				count++;
		}
		
		StringBuilder sb = new StringBuilder();
		if(count >= M)
			sb.append("Yes\n");
		else
			sb.append("No\n");
		
		System.out.println(sb);
		
	}

}