

import java.util.Scanner;



public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		double M = sc.nextInt();
		int[] A = new int[N];
		double sum = 0;
		for(int i=0; i<N; i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		}
		sc.close();
		int temp;
		int n=A.length;
		for(int i=0; i<n-1; i++) { //降順に並び替え
			for(int j=i+1; j<n; j++) {
				if(A[i]<A[j]) {
					temp=A[i];
					A[i]=A[j];
					A[j]=temp;
				}
			}
		}

		double line = 1/(4*M);


		for(int i=0; i<M; i++) {
			if( A[i]/sum < line ) {
				System.out.println("No");
				return;
			}
		}
		System.out.println("Yes");



	}

} 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();
		double M = sc.nextInt();
		int[] A = new int[N];
		double sum = 0;
		for(int i=0; i<N; i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		}
		sc.close();
		int temp;
		int n=A.length;
		for(int i=0; i<n-1; i++) { //降順に並び替え
			for(int j=i+1; j<n; j++) {
				if(A[i]<A[j]) {
					temp=A[i];
					A[i]=A[j];
					A[j]=temp;
				}
			}
		}

		double line = 1/(4*M);


		for(int i=0; i<M; i++) {
			if( A[i]/sum < line ) {
				System.out.println("No");
				return;
			}
		}
		System.out.println("Yes");



	}

} Main public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		double M = sc.nextInt();
		int[] A = new int[N];
		double sum = 0;
		for(int i=0; i<N; i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		}
		sc.close();
		int temp;
		int n=A.length;
		for(int i=0; i<n-1; i++) { //降順に並び替え
			for(int j=i+1; j<n; j++) {
				if(A[i]<A[j]) {
					temp=A[i];
					A[i]=A[j];
					A[j]=temp;
				}
			}
		}

		double line = 1/(4*M);


		for(int i=0; i<M; i++) {
			if( A[i]/sum < line ) {
				System.out.println("No");
				return;
			}
		}
		System.out.println("Yes");



	} main {

		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		double M = sc.nextInt();
		int[] A = new int[N];
		double sum = 0;
		for(int i=0; i<N; i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		}
		sc.close();
		int temp;
		int n=A.length;
		for(int i=0; i<n-1; i++) { //降順に並び替え
			for(int j=i+1; j<n; j++) {
				if(A[i]<A[j]) {
					temp=A[i];
					A[i]=A[j];
					A[j]=temp;
				}
			}
		}

		double line = 1/(4*M);


		for(int i=0; i<M; i++) {
			if( A[i]/sum < line ) {
				System.out.println("No");
				return;
			}
		}
		System.out.println("Yes");



	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc double M = sc.nextInt(); M sc.nextInt() sc.nextInt sc int[] A = new int[N]; A new int[N] N double 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 sc.close() sc.close sc int temp; temp int n=A.length; n A.length A A.length for(int i=0; i<n-1; i++) { //降順に並び替え
			for(int j=i+1; j<n; j++) {
				if(A[i]<A[j]) {
					temp=A[i];
					A[i]=A[j];
					A[j]=temp;
				}
			}
		} int i=0; int i=0; i 0 i<n-1 i n-1 n 1 i++ i++ i { //降順に並び替え
			for(int j=i+1; j<n; j++) {
				if(A[i]<A[j]) {
					temp=A[i];
					A[i]=A[j];
					A[j]=temp;
				}
			}
		} { //降順に並び替え
			for(int j=i+1; j<n; j++) {
				if(A[i]<A[j]) {
					temp=A[i];
					A[i]=A[j];
					A[j]=temp;
				}
			}
		} for(int j=i+1; j<n; j++) {
				if(A[i]<A[j]) {
					temp=A[i];
					A[i]=A[j];
					A[j]=temp;
				}
			} int j=i+1; int j=i+1; j i+1 i 1 j<n j n j++ j++ j {
				if(A[i]<A[j]) {
					temp=A[i];
					A[i]=A[j];
					A[j]=temp;
				}
			} {
				if(A[i]<A[j]) {
					temp=A[i];
					A[i]=A[j];
					A[j]=temp;
				}
			} if(A[i]<A[j]) {
					temp=A[i];
					A[i]=A[j];
					A[j]=temp;
				} A[i]<A[j] A[i] A i A[j] A j {
					temp=A[i];
					A[i]=A[j];
					A[j]=temp;
				} temp=A[i] temp A[i] A i A[i]=A[j] A[i] A i A[j] A j A[j]=temp A[j] A j temp double line = 1/(4*M); line 1/(4*M) 1 (4*M) 4 M for(int i=0; i<M; i++) {
			if( A[i]/sum < line ) {
				System.out.println("No");
				return;
			}
		} int i=0; int i=0; i 0 i<M i M i++ i++ i {
			if( A[i]/sum < line ) {
				System.out.println("No");
				return;
			}
		} {
			if( A[i]/sum < line ) {
				System.out.println("No");
				return;
			}
		} if( A[i]/sum < line ) {
				System.out.println("No");
				return;
			} A[i]/sum < line A[i]/sum A[i] A i sum line {
				System.out.println("No");
				return;
			} System.out.println("No") System.out.println System.out System System.out "No" return; System.out.println("Yes") System.out.println System.out System System.out "Yes" String[] args args public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		double M = sc.nextInt();
		int[] A = new int[N];
		double sum = 0;
		for(int i=0; i<N; i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		}
		sc.close();
		int temp;
		int n=A.length;
		for(int i=0; i<n-1; i++) { //降順に並び替え
			for(int j=i+1; j<n; j++) {
				if(A[i]<A[j]) {
					temp=A[i];
					A[i]=A[j];
					A[j]=temp;
				}
			}
		}

		double line = 1/(4*M);


		for(int i=0; i<M; i++) {
			if( A[i]/sum < line ) {
				System.out.println("No");
				return;
			}
		}
		System.out.println("Yes");



	}

} public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		double M = sc.nextInt();
		int[] A = new int[N];
		double sum = 0;
		for(int i=0; i<N; i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		}
		sc.close();
		int temp;
		int n=A.length;
		for(int i=0; i<n-1; i++) { //降順に並び替え
			for(int j=i+1; j<n; j++) {
				if(A[i]<A[j]) {
					temp=A[i];
					A[i]=A[j];
					A[j]=temp;
				}
			}
		}

		double line = 1/(4*M);


		for(int i=0; i<M; i++) {
			if( A[i]/sum < line ) {
				System.out.println("No");
				return;
			}
		}
		System.out.println("Yes");



	}

} Main


import java.util.Scanner;



public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		double M = sc.nextInt();
		int[] A = new int[N];
		double sum = 0;
		for(int i=0; i<N; i++) {
			A[i] = sc.nextInt();
			sum += A[i];
		}
		sc.close();
		int temp;
		int n=A.length;
		for(int i=0; i<n-1; i++) { //降順に並び替え
			for(int j=i+1; j<n; j++) {
				if(A[i]<A[j]) {
					temp=A[i];
					A[i]=A[j];
					A[j]=temp;
				}
			}
		}

		double line = 1/(4*M);


		for(int i=0; i<M; i++) {
			if( A[i]/sum < line ) {
				System.out.println("No");
				return;
			}
		}
		System.out.println("Yes");



	}

}
