import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		int n, m;
		double per;
		int sum = 0;
		Scanner scan = new Scanner(System.in);

		n = scan.nextInt();
		m = scan.nextInt();

		int array[] = new int[n];
		double array_per[] = new double[n];

		for(int i = 0; i < n; i++) {
			array[i] = scan.nextInt();
			sum += array[i];
		}

		per = 1.0/(4*m);

		for(int i = 0; i < n; i++) {
			array_per[i] = (double)array[i]/sum;
		}

		int count = 0;
		for(int i = 0; i < n; i++) {
			if(array_per[i] >= per) {
				count++;

				if(count >= m) {
					System.out.println("Yes");
					break;
				}
			} else {
				if(i == n-1) {
					System.out.println("No");
				}
			}
		}
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {
		int n, m;
		double per;
		int sum = 0;
		Scanner scan = new Scanner(System.in);

		n = scan.nextInt();
		m = scan.nextInt();

		int array[] = new int[n];
		double array_per[] = new double[n];

		for(int i = 0; i < n; i++) {
			array[i] = scan.nextInt();
			sum += array[i];
		}

		per = 1.0/(4*m);

		for(int i = 0; i < n; i++) {
			array_per[i] = (double)array[i]/sum;
		}

		int count = 0;
		for(int i = 0; i < n; i++) {
			if(array_per[i] >= per) {
				count++;

				if(count >= m) {
					System.out.println("Yes");
					break;
				}
			} else {
				if(i == n-1) {
					System.out.println("No");
				}
			}
		}
	}
} Main public static void main(String[] args) {
		int n, m;
		double per;
		int sum = 0;
		Scanner scan = new Scanner(System.in);

		n = scan.nextInt();
		m = scan.nextInt();

		int array[] = new int[n];
		double array_per[] = new double[n];

		for(int i = 0; i < n; i++) {
			array[i] = scan.nextInt();
			sum += array[i];
		}

		per = 1.0/(4*m);

		for(int i = 0; i < n; i++) {
			array_per[i] = (double)array[i]/sum;
		}

		int count = 0;
		for(int i = 0; i < n; i++) {
			if(array_per[i] >= per) {
				count++;

				if(count >= m) {
					System.out.println("Yes");
					break;
				}
			} else {
				if(i == n-1) {
					System.out.println("No");
				}
			}
		}
	} main {
		int n, m;
		double per;
		int sum = 0;
		Scanner scan = new Scanner(System.in);

		n = scan.nextInt();
		m = scan.nextInt();

		int array[] = new int[n];
		double array_per[] = new double[n];

		for(int i = 0; i < n; i++) {
			array[i] = scan.nextInt();
			sum += array[i];
		}

		per = 1.0/(4*m);

		for(int i = 0; i < n; i++) {
			array_per[i] = (double)array[i]/sum;
		}

		int count = 0;
		for(int i = 0; i < n; i++) {
			if(array_per[i] >= per) {
				count++;

				if(count >= m) {
					System.out.println("Yes");
					break;
				}
			} else {
				if(i == n-1) {
					System.out.println("No");
				}
			}
		}
	} int n n m; m double per; per int sum = 0; sum 0 Scanner scan = new Scanner(System.in); scan new Scanner(System.in) n = scan.nextInt() n scan.nextInt() scan.nextInt scan m = scan.nextInt() m scan.nextInt() scan.nextInt scan int array[] = new int[n]; array new int[n] n double array_per[] = new double[n]; array_per new double[n] n for(int i = 0; i < n; i++) {
			array[i] = scan.nextInt();
			sum += array[i];
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			array[i] = scan.nextInt();
			sum += array[i];
		} {
			array[i] = scan.nextInt();
			sum += array[i];
		} array[i] = scan.nextInt() array[i] array i scan.nextInt() scan.nextInt scan sum += array[i] sum array[i] array i per = 1.0/(4*m) per 1.0/(4*m) 1.0 (4*m) 4 m for(int i = 0; i < n; i++) {
			array_per[i] = (double)array[i]/sum;
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			array_per[i] = (double)array[i]/sum;
		} {
			array_per[i] = (double)array[i]/sum;
		} array_per[i] = (double)array[i]/sum array_per[i] array_per i (double)array[i]/sum (double)array[i] array i sum int count = 0; count 0 for(int i = 0; i < n; i++) {
			if(array_per[i] >= per) {
				count++;

				if(count >= m) {
					System.out.println("Yes");
					break;
				}
			} else {
				if(i == n-1) {
					System.out.println("No");
				}
			}
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			if(array_per[i] >= per) {
				count++;

				if(count >= m) {
					System.out.println("Yes");
					break;
				}
			} else {
				if(i == n-1) {
					System.out.println("No");
				}
			}
		} {
			if(array_per[i] >= per) {
				count++;

				if(count >= m) {
					System.out.println("Yes");
					break;
				}
			} else {
				if(i == n-1) {
					System.out.println("No");
				}
			}
		} if(array_per[i] >= per) {
				count++;

				if(count >= m) {
					System.out.println("Yes");
					break;
				}
			} else {
				if(i == n-1) {
					System.out.println("No");
				}
			} array_per[i] >= per array_per[i] array_per i per {
				count++;

				if(count >= m) {
					System.out.println("Yes");
					break;
				}
			} count++ count if(count >= m) {
					System.out.println("Yes");
					break;
				} count >= m count m {
					System.out.println("Yes");
					break;
				} System.out.println("Yes") System.out.println System.out System System.out "Yes" break; {
				if(i == n-1) {
					System.out.println("No");
				}
			} if(i == n-1) {
					System.out.println("No");
				} i == n-1 i n-1 n 1 {
					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) {
		int n, m;
		double per;
		int sum = 0;
		Scanner scan = new Scanner(System.in);

		n = scan.nextInt();
		m = scan.nextInt();

		int array[] = new int[n];
		double array_per[] = new double[n];

		for(int i = 0; i < n; i++) {
			array[i] = scan.nextInt();
			sum += array[i];
		}

		per = 1.0/(4*m);

		for(int i = 0; i < n; i++) {
			array_per[i] = (double)array[i]/sum;
		}

		int count = 0;
		for(int i = 0; i < n; i++) {
			if(array_per[i] >= per) {
				count++;

				if(count >= m) {
					System.out.println("Yes");
					break;
				}
			} else {
				if(i == n-1) {
					System.out.println("No");
				}
			}
		}
	}
} public class Main {
	public static void main(String[] args) {
		int n, m;
		double per;
		int sum = 0;
		Scanner scan = new Scanner(System.in);

		n = scan.nextInt();
		m = scan.nextInt();

		int array[] = new int[n];
		double array_per[] = new double[n];

		for(int i = 0; i < n; i++) {
			array[i] = scan.nextInt();
			sum += array[i];
		}

		per = 1.0/(4*m);

		for(int i = 0; i < n; i++) {
			array_per[i] = (double)array[i]/sum;
		}

		int count = 0;
		for(int i = 0; i < n; i++) {
			if(array_per[i] >= per) {
				count++;

				if(count >= m) {
					System.out.println("Yes");
					break;
				}
			} else {
				if(i == n-1) {
					System.out.println("No");
				}
			}
		}
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		int n, m;
		double per;
		int sum = 0;
		Scanner scan = new Scanner(System.in);

		n = scan.nextInt();
		m = scan.nextInt();

		int array[] = new int[n];
		double array_per[] = new double[n];

		for(int i = 0; i < n; i++) {
			array[i] = scan.nextInt();
			sum += array[i];
		}

		per = 1.0/(4*m);

		for(int i = 0; i < n; i++) {
			array_per[i] = (double)array[i]/sum;
		}

		int count = 0;
		for(int i = 0; i < n; i++) {
			if(array_per[i] >= per) {
				count++;

				if(count >= m) {
					System.out.println("Yes");
					break;
				}
			} else {
				if(i == n-1) {
					System.out.println("No");
				}
			}
		}
	}
}
