import java.util.*;
 
public class Main{
  public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		double num = 0;
		double total = 0;
		int count = 0;
		int[] number = new int[N];
		for(int i = 0;i < N;i++) {
			int A = sc.nextInt();
			number[i] += A;
			num += A;
			if(i == N-1 && M > 0) {
				total = num / (4 * M);
				for(int j = 0;j < N;j++) {
					if(number[j] >= total) {
						count++;
					}
				}
			}
		}
		if(count >= M && M > 0 ) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		
	}
} import java.util.*; util.* java public class Main{
  public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		double num = 0;
		double total = 0;
		int count = 0;
		int[] number = new int[N];
		for(int i = 0;i < N;i++) {
			int A = sc.nextInt();
			number[i] += A;
			num += A;
			if(i == N-1 && M > 0) {
				total = num / (4 * M);
				for(int j = 0;j < N;j++) {
					if(number[j] >= total) {
						count++;
					}
				}
			}
		}
		if(count >= M && M > 0 ) {
			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();
		double num = 0;
		double total = 0;
		int count = 0;
		int[] number = new int[N];
		for(int i = 0;i < N;i++) {
			int A = sc.nextInt();
			number[i] += A;
			num += A;
			if(i == N-1 && M > 0) {
				total = num / (4 * M);
				for(int j = 0;j < N;j++) {
					if(number[j] >= total) {
						count++;
					}
				}
			}
		}
		if(count >= M && M > 0 ) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		
	} main {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		double num = 0;
		double total = 0;
		int count = 0;
		int[] number = new int[N];
		for(int i = 0;i < N;i++) {
			int A = sc.nextInt();
			number[i] += A;
			num += A;
			if(i == N-1 && M > 0) {
				total = num / (4 * M);
				for(int j = 0;j < N;j++) {
					if(number[j] >= total) {
						count++;
					}
				}
			}
		}
		if(count >= M && M > 0 ) {
			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 double num = 0; num 0 double total = 0; total 0 int count = 0; count 0 int[] number = new int[N]; number new int[N] N for(int i = 0;i < N;i++) {
			int A = sc.nextInt();
			number[i] += A;
			num += A;
			if(i == N-1 && M > 0) {
				total = num / (4 * M);
				for(int j = 0;j < N;j++) {
					if(number[j] >= total) {
						count++;
					}
				}
			}
		} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
			int A = sc.nextInt();
			number[i] += A;
			num += A;
			if(i == N-1 && M > 0) {
				total = num / (4 * M);
				for(int j = 0;j < N;j++) {
					if(number[j] >= total) {
						count++;
					}
				}
			}
		} {
			int A = sc.nextInt();
			number[i] += A;
			num += A;
			if(i == N-1 && M > 0) {
				total = num / (4 * M);
				for(int j = 0;j < N;j++) {
					if(number[j] >= total) {
						count++;
					}
				}
			}
		} int A = sc.nextInt(); A sc.nextInt() sc.nextInt sc number[i] += A number[i] number i A num += A num A if(i == N-1 && M > 0) {
				total = num / (4 * M);
				for(int j = 0;j < N;j++) {
					if(number[j] >= total) {
						count++;
					}
				}
			} i == N-1 && M > 0 i == N-1 i N-1 N 1 M > 0 M 0 {
				total = num / (4 * M);
				for(int j = 0;j < N;j++) {
					if(number[j] >= total) {
						count++;
					}
				}
			} total = num / (4 * M) total num / (4 * M) num (4 * M) 4 M for(int j = 0;j < N;j++) {
					if(number[j] >= total) {
						count++;
					}
				} int j = 0; int j = 0; j 0 j < N j N j++ j++ j {
					if(number[j] >= total) {
						count++;
					}
				} {
					if(number[j] >= total) {
						count++;
					}
				} if(number[j] >= total) {
						count++;
					} number[j] >= total number[j] number j total {
						count++;
					} count++ count if(count >= M && M > 0 ) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		} count >= M && M > 0 count >= M count M M > 0 M 0 {
			System.out.println("Yes");
		} System.out.println("Yes") System.out.println System.out System System.out "Yes" {
			System.out.println("No");
		} 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 sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		double num = 0;
		double total = 0;
		int count = 0;
		int[] number = new int[N];
		for(int i = 0;i < N;i++) {
			int A = sc.nextInt();
			number[i] += A;
			num += A;
			if(i == N-1 && M > 0) {
				total = num / (4 * M);
				for(int j = 0;j < N;j++) {
					if(number[j] >= total) {
						count++;
					}
				}
			}
		}
		if(count >= M && M > 0 ) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		
	}
} public class Main{
  public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		double num = 0;
		double total = 0;
		int count = 0;
		int[] number = new int[N];
		for(int i = 0;i < N;i++) {
			int A = sc.nextInt();
			number[i] += A;
			num += A;
			if(i == N-1 && M > 0) {
				total = num / (4 * M);
				for(int j = 0;j < N;j++) {
					if(number[j] >= total) {
						count++;
					}
				}
			}
		}
		if(count >= M && M > 0 ) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		
	}
} Main
import java.util.*;
 
public class Main{
  public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		double num = 0;
		double total = 0;
		int count = 0;
		int[] number = new int[N];
		for(int i = 0;i < N;i++) {
			int A = sc.nextInt();
			number[i] += A;
			num += A;
			if(i == N-1 && M > 0) {
				total = num / (4 * M);
				for(int j = 0;j < N;j++) {
					if(number[j] >= total) {
						count++;
					}
				}
			}
		}
		if(count >= M && M > 0 ) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		
	}
}