import java.util.Scanner;

public class Main {
	
	   

		public static void main(String[] args) {
	        Scanner sc = new Scanner(System.in);
	        int n = sc.nextInt();
	        int m = sc.nextInt();
//	        int z = sc.nextInt();
	        int sum = 0;
	        int cnt = 0;
	        int[] all = new int[n];
	        for(int i = 0 ; i<n; i++) {
	        	all[i] = sc.nextInt();
	        	sum += all[i];
	        }
	        
	        for(int i = 0 ; i<n; i++) {
	        	if(all[i]*4*m >= sum) {
	        		cnt++;
	        	}
	        	
	        }
	        if(cnt >= m)  System.out.println("Yes");
	        else System.out.println("No");
	        
	        
	        
	        
	        
	        
	        
	       // System.out.println(result); 
	        
            

          
	        
            //System.out.println(res); 
	        
	}
} 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();
	        int m = sc.nextInt();
//	        int z = sc.nextInt();
	        int sum = 0;
	        int cnt = 0;
	        int[] all = new int[n];
	        for(int i = 0 ; i<n; i++) {
	        	all[i] = sc.nextInt();
	        	sum += all[i];
	        }
	        
	        for(int i = 0 ; i<n; i++) {
	        	if(all[i]*4*m >= sum) {
	        		cnt++;
	        	}
	        	
	        }
	        if(cnt >= m)  System.out.println("Yes");
	        else System.out.println("No");
	        
	        
	        
	        
	        
	        
	        
	       // System.out.println(result); 
	        
            

          
	        
            //System.out.println(res); 
	        
	}
} Main public static void main(String[] args) {
	        Scanner sc = new Scanner(System.in);
	        int n = sc.nextInt();
	        int m = sc.nextInt();
//	        int z = sc.nextInt();
	        int sum = 0;
	        int cnt = 0;
	        int[] all = new int[n];
	        for(int i = 0 ; i<n; i++) {
	        	all[i] = sc.nextInt();
	        	sum += all[i];
	        }
	        
	        for(int i = 0 ; i<n; i++) {
	        	if(all[i]*4*m >= sum) {
	        		cnt++;
	        	}
	        	
	        }
	        if(cnt >= m)  System.out.println("Yes");
	        else System.out.println("No");
	        
	        
	        
	        
	        
	        
	        
	       // System.out.println(result); 
	        
            

          
	        
            //System.out.println(res); 
	        
	} main {
	        Scanner sc = new Scanner(System.in);
	        int n = sc.nextInt();
	        int m = sc.nextInt();
//	        int z = sc.nextInt();
	        int sum = 0;
	        int cnt = 0;
	        int[] all = new int[n];
	        for(int i = 0 ; i<n; i++) {
	        	all[i] = sc.nextInt();
	        	sum += all[i];
	        }
	        
	        for(int i = 0 ; i<n; i++) {
	        	if(all[i]*4*m >= sum) {
	        		cnt++;
	        	}
	        	
	        }
	        if(cnt >= m)  System.out.println("Yes");
	        else System.out.println("No");
	        
	        
	        
	        
	        
	        
	        
	       // System.out.println(result); 
	        
            

          
	        
            //System.out.println(res); 
	        
	} 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 int sum = 0; sum 0 int cnt = 0; cnt 0 int[] all = new int[n]; all new int[n] n for(int i = 0 ; i<n; i++) {
	        	all[i] = sc.nextInt();
	        	sum += all[i];
	        } int i = 0 ; int i = 0 ; i 0 i<n i n i++ i++ i {
	        	all[i] = sc.nextInt();
	        	sum += all[i];
	        } {
	        	all[i] = sc.nextInt();
	        	sum += all[i];
	        } all[i] = sc.nextInt() all[i] all i sc.nextInt() sc.nextInt sc sum += all[i] sum all[i] all i for(int i = 0 ; i<n; i++) {
	        	if(all[i]*4*m >= sum) {
	        		cnt++;
	        	}
	        	
	        } int i = 0 ; int i = 0 ; i 0 i<n i n i++ i++ i {
	        	if(all[i]*4*m >= sum) {
	        		cnt++;
	        	}
	        	
	        } {
	        	if(all[i]*4*m >= sum) {
	        		cnt++;
	        	}
	        	
	        } if(all[i]*4*m >= sum) {
	        		cnt++;
	        	} all[i]*4*m >= sum all[i]*4*m all[i]*4*m all[i] all i 4 m sum {
	        		cnt++;
	        	} cnt++ cnt if(cnt >= m)  System.out.println("Yes");
	        else System.out.println("No"); cnt >= m cnt m System.out.println("Yes") System.out.println System.out System System.out "Yes" 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();
//	        int z = sc.nextInt();
	        int sum = 0;
	        int cnt = 0;
	        int[] all = new int[n];
	        for(int i = 0 ; i<n; i++) {
	        	all[i] = sc.nextInt();
	        	sum += all[i];
	        }
	        
	        for(int i = 0 ; i<n; i++) {
	        	if(all[i]*4*m >= sum) {
	        		cnt++;
	        	}
	        	
	        }
	        if(cnt >= m)  System.out.println("Yes");
	        else System.out.println("No");
	        
	        
	        
	        
	        
	        
	        
	       // System.out.println(result); 
	        
            

          
	        
            //System.out.println(res); 
	        
	}
} public class Main {
	
	   

		public static void main(String[] args) {
	        Scanner sc = new Scanner(System.in);
	        int n = sc.nextInt();
	        int m = sc.nextInt();
//	        int z = sc.nextInt();
	        int sum = 0;
	        int cnt = 0;
	        int[] all = new int[n];
	        for(int i = 0 ; i<n; i++) {
	        	all[i] = sc.nextInt();
	        	sum += all[i];
	        }
	        
	        for(int i = 0 ; i<n; i++) {
	        	if(all[i]*4*m >= sum) {
	        		cnt++;
	        	}
	        	
	        }
	        if(cnt >= m)  System.out.println("Yes");
	        else System.out.println("No");
	        
	        
	        
	        
	        
	        
	        
	       // System.out.println(result); 
	        
            

          
	        
            //System.out.println(res); 
	        
	}
} Main
import java.util.Scanner;

public class Main {
	
	   

		public static void main(String[] args) {
	        Scanner sc = new Scanner(System.in);
	        int n = sc.nextInt();
	        int m = sc.nextInt();
//	        int z = sc.nextInt();
	        int sum = 0;
	        int cnt = 0;
	        int[] all = new int[n];
	        for(int i = 0 ; i<n; i++) {
	        	all[i] = sc.nextInt();
	        	sum += all[i];
	        }
	        
	        for(int i = 0 ; i<n; i++) {
	        	if(all[i]*4*m >= sum) {
	        		cnt++;
	        	}
	        	
	        }
	        if(cnt >= m)  System.out.println("Yes");
	        else System.out.println("No");
	        
	        
	        
	        
	        
	        
	        
	       // System.out.println(result); 
	        
            

          
	        
            //System.out.println(res); 
	        
	}
}
