import java.util.*;
import java.lang.*;
public class Main {
    public static void main(String args[]) {
     Scanner sc = new Scanner(System.in);
     int i,j,k,l,m,n,x,y,z;
     double s=0,f=0;
     n=sc.nextInt();
     m=sc.nextInt();
     int a[] = new int[n];
     for(i=0;i<n;i++)
     {
         a[i] = sc.nextInt();
         s=s+a[i];
         
     }
     Arrays.sort(a);
     s=(Math.ceil(s/(4*m)));
    
     for(j=n-1;j>=(n-m);j--)
     {
         if(a[j]<(int)s)
         {
             f=1;
             System.out.print("No");
             break;
         }
     }
     if(f!=1)
     {
         System.out.println("Yes");
     }
    }
} import java.util.*; util.* java import java.lang.*; lang.* java public class Main {
    public static void main(String args[]) {
     Scanner sc = new Scanner(System.in);
     int i,j,k,l,m,n,x,y,z;
     double s=0,f=0;
     n=sc.nextInt();
     m=sc.nextInt();
     int a[] = new int[n];
     for(i=0;i<n;i++)
     {
         a[i] = sc.nextInt();
         s=s+a[i];
         
     }
     Arrays.sort(a);
     s=(Math.ceil(s/(4*m)));
    
     for(j=n-1;j>=(n-m);j--)
     {
         if(a[j]<(int)s)
         {
             f=1;
             System.out.print("No");
             break;
         }
     }
     if(f!=1)
     {
         System.out.println("Yes");
     }
    }
} Main public static void main(String args[]) {
     Scanner sc = new Scanner(System.in);
     int i,j,k,l,m,n,x,y,z;
     double s=0,f=0;
     n=sc.nextInt();
     m=sc.nextInt();
     int a[] = new int[n];
     for(i=0;i<n;i++)
     {
         a[i] = sc.nextInt();
         s=s+a[i];
         
     }
     Arrays.sort(a);
     s=(Math.ceil(s/(4*m)));
    
     for(j=n-1;j>=(n-m);j--)
     {
         if(a[j]<(int)s)
         {
             f=1;
             System.out.print("No");
             break;
         }
     }
     if(f!=1)
     {
         System.out.println("Yes");
     }
    } main {
     Scanner sc = new Scanner(System.in);
     int i,j,k,l,m,n,x,y,z;
     double s=0,f=0;
     n=sc.nextInt();
     m=sc.nextInt();
     int a[] = new int[n];
     for(i=0;i<n;i++)
     {
         a[i] = sc.nextInt();
         s=s+a[i];
         
     }
     Arrays.sort(a);
     s=(Math.ceil(s/(4*m)));
    
     for(j=n-1;j>=(n-m);j--)
     {
         if(a[j]<(int)s)
         {
             f=1;
             System.out.print("No");
             break;
         }
     }
     if(f!=1)
     {
         System.out.println("Yes");
     }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int i i j j k k l l m m n n x x y y z; z double s=0 s 0 f=0; f 0 n=sc.nextInt() n sc.nextInt() sc.nextInt sc m=sc.nextInt() m sc.nextInt() sc.nextInt sc int a[] = new int[n]; a new int[n] n for(i=0;i<n;i++)
     {
         a[i] = sc.nextInt();
         s=s+a[i];
         
     } i=0; i=0 i 0 i<n i n i++ i++ i {
         a[i] = sc.nextInt();
         s=s+a[i];
         
     } {
         a[i] = sc.nextInt();
         s=s+a[i];
         
     } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc s=s+a[i] s s+a[i] s a[i] a i Arrays.sort(a) Arrays.sort Arrays a s=(Math.ceil(s/(4*m))) s (Math.ceil(s/(4*m))) Math.ceil Math s/(4*m) s (4*m) 4 m for(j=n-1;j>=(n-m);j--)
     {
         if(a[j]<(int)s)
         {
             f=1;
             System.out.print("No");
             break;
         }
     } j=n-1; j=n-1 j n-1 n 1 j>=(n-m) j (n-m) n m j-- j-- j {
         if(a[j]<(int)s)
         {
             f=1;
             System.out.print("No");
             break;
         }
     } {
         if(a[j]<(int)s)
         {
             f=1;
             System.out.print("No");
             break;
         }
     } if(a[j]<(int)s)
         {
             f=1;
             System.out.print("No");
             break;
         } a[j]<(int)s a[j] a j (int)s {
             f=1;
             System.out.print("No");
             break;
         } f=1 f 1 System.out.print("No") System.out.print System.out System System.out "No" break; if(f!=1)
     {
         System.out.println("Yes");
     } f!=1 f 1 {
         System.out.println("Yes");
     } 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 i,j,k,l,m,n,x,y,z;
     double s=0,f=0;
     n=sc.nextInt();
     m=sc.nextInt();
     int a[] = new int[n];
     for(i=0;i<n;i++)
     {
         a[i] = sc.nextInt();
         s=s+a[i];
         
     }
     Arrays.sort(a);
     s=(Math.ceil(s/(4*m)));
    
     for(j=n-1;j>=(n-m);j--)
     {
         if(a[j]<(int)s)
         {
             f=1;
             System.out.print("No");
             break;
         }
     }
     if(f!=1)
     {
         System.out.println("Yes");
     }
    }
} public class Main {
    public static void main(String args[]) {
     Scanner sc = new Scanner(System.in);
     int i,j,k,l,m,n,x,y,z;
     double s=0,f=0;
     n=sc.nextInt();
     m=sc.nextInt();
     int a[] = new int[n];
     for(i=0;i<n;i++)
     {
         a[i] = sc.nextInt();
         s=s+a[i];
         
     }
     Arrays.sort(a);
     s=(Math.ceil(s/(4*m)));
    
     for(j=n-1;j>=(n-m);j--)
     {
         if(a[j]<(int)s)
         {
             f=1;
             System.out.print("No");
             break;
         }
     }
     if(f!=1)
     {
         System.out.println("Yes");
     }
    }
} Main
import java.util.*;
import java.lang.*;
public class Main {
    public static void main(String args[]) {
     Scanner sc = new Scanner(System.in);
     int i,j,k,l,m,n,x,y,z;
     double s=0,f=0;
     n=sc.nextInt();
     m=sc.nextInt();
     int a[] = new int[n];
     for(i=0;i<n;i++)
     {
         a[i] = sc.nextInt();
         s=s+a[i];
         
     }
     Arrays.sort(a);
     s=(Math.ceil(s/(4*m)));
    
     for(j=n-1;j>=(n-m);j--)
     {
         if(a[j]<(int)s)
         {
             f=1;
             System.out.print("No");
             break;
         }
     }
     if(f!=1)
     {
         System.out.println("Yes");
     }
    }
}