description: You are given an array a of n integers, and another integer k such that 2k ≤ n.
  
  You have to perform exactly k operations with this array. In one operation, you have to choose two elements of the array (let them be a_i and a_j; they can be equal or different, but their positions in the array must not be the same), remove them from the array, and add ⌊ (a_i)/(a_j) ⌋ to your score, where ⌊ x/y ⌋ is the maximum integer not exceeding x/y.
  
  Initially, your score is 0. After you perform exactly k operations, you add all the remaining elements of the array to the score.
  
  Calculate the minimum possible score you can get.
  
  Input
  
  The first line of the input contains one integer t (1 ≤ t ≤ 500) — the number of test cases.
  
  Each test case consists of two lines. The first line contains two integers n and k (1 ≤ n ≤ 100; 0 ≤ k ≤ ⌊ n/2 ⌋).
  
  The second line contains n integers a_1, a_2, ..., a_n (1 ≤ a_i ≤ 2 ⋅ 10^5).
  
  Output
  
  Print one integer — the minimum possible score you can get.
  
  Example
  
  Input
  
  
  5
  7 3
  1 1 1 2 1 3 1
  5 1
  5 5 5 5 5
  4 2
  1 3 3 7
  2 0
  4 2
  9 2
  1 10 10 1 10 2 7 10 3
  
  
  Output
  
  
  2
  16
  0
  6
  16
  
  Note
  
  Let's consider the example test.
  
  In the first test case, one way to obtain a score of 2 is the following one:
  
    1. choose a_7 = 1 and a_4 = 2 for the operation; the score becomes 0 + ⌊ 1/2 ⌋ = 0, the array becomes [1, 1, 1, 1, 3]; 
    2. choose a_1 = 1 and a_5 = 3 for the operation; the score becomes 0 + ⌊ 1/3 ⌋ = 0, the array becomes [1, 1, 1]; 
    3. choose a_1 = 1 and a_2 = 1 for the operation; the score becomes 0 + ⌊ 1/1 ⌋ = 1, the array becomes [1]; 
    4. add the remaining element 1 to the score, so the resulting score is 2. 
  
  
  
  In the second test case, no matter which operations you choose, the resulting score is 16.
  
  In the third test case, one way to obtain a score of 0 is the following one:
  
    1. choose a_1 = 1 and a_2 = 3 for the operation; the score becomes 0 + ⌊ 1/3 ⌋ = 0, the array becomes [3, 7]; 
    2. choose a_1 = 3 and a_2 = 7 for the operation; the score becomes 0 + ⌊ 3/7 ⌋ = 0, the array becomes empty; 
    3. the array is empty, so the score doesn't change anymore. 
  
  
  
  In the fourth test case, no operations can be performed, so the score is the sum of the elements of the array: 4 + 2 = 6.
solution: 
  
  
  
  
  /* package codechef; // don't place package name! */
  
  import java.util.*;
  import java.lang.*;
  import java.io.*;
  /* Name of the class has to be "Main" only if the class is public. */
  public class Codechef
  {static class FastReader 
      { 
          BufferedReader br; 
          StringTokenizer st; 
    
          public FastReader() 
          { 
              br = new BufferedReader(new
                       InputStreamReader(System.in)); 
          } 
    
          String next() 
          { 
              while (st == null || !st.hasMoreElements()) 
              { 
                  try
                  { 
                      st = new StringTokenizer(br.readLine()); 
                  } 
                  catch (IOException  e) 
                  { 
                      e.printStackTrace(); 
                  } 
              } 
              return st.nextToken(); 
          } 
    
          int nextInt() 
          { 
              return Integer.parseInt(next()); 
          } 
    
          long nextLong() 
          { 
              return Long.parseLong(next()); 
          } 
    
          double nextDouble() 
          { 
              return Double.parseDouble(next()); 
          } 
    
          String nextLine() 
          { 
              String str = ""; 
              try
              { 
                  str = br.readLine(); 
              } 
              catch (IOException e) 
              { 
                  e.printStackTrace(); 
              } 
              return str; 
          } 
      } 
  //    static int mod = 998244353 ;
  //    static int N = 200005;
  //    static long factorial_num_inv[] = new long[N+1];
  //    static long natual_num_inv[] = new long[N+1];
  //    static long fact[] = new long[N+1];
  //    static void InverseofNumber() 
  //{ 
  //    natual_num_inv[0] = 1;
  //    natual_num_inv[1] = 1; 
  //    for (int i = 2; i <= N; i++) 
  //        natual_num_inv[i] = natual_num_inv[mod % i] * (mod - mod / i) % mod; 
  //} 
  //static void InverseofFactorial() 
  //{ 
  //    factorial_num_inv[0] = factorial_num_inv[1] = 1; 
    
  //    for (int i = 2; i <= N; i++) 
  //        factorial_num_inv[i] = (natual_num_inv[i] * factorial_num_inv[i - 1]) % mod; 
  //} 
  //static long nCrModP(long N, long R) 
  //{ 
  //    long ans = ((fact[(int)N] * factorial_num_inv[(int)R]) % mod * factorial_num_inv[(int)(N - R)]) % mod; 
  //    return ans%mod; 
  //}
      //static boolean prime[];
      //static void sieveOfEratosthenes(int n)
      //{
      //    prime = new boolean[n+1];
          
      //    for (int i = 0; i <= n; i++)
      //        prime[i] = true;
   
      //    for (int p = 2; p * p <= n; p++)
      //    {
      //        // If prime[p] is not changed, then it is a
      //        // prime
      //        if (prime[p] == true)
      //        {
      //            // Update all multiples of p
      //            for (int i = p * p; i <= n; i += p)
      //                prime[i] = false;
      //        }
      //    }
   
          
      //}
      
      static int visited[];
  	public static void main (String[] args) throws java.lang.Exception
  	{
      //    InverseofNumber();
      //    InverseofFactorial();
      //   fact[0] = 1; 
      //   for (long i = 1; i <= 2*100000; i++)
      //   { 
      //       fact[(int)i] = (fact[(int)i - 1] * i) % mod; 
      //   }
      
  		FastReader scan = new FastReader();
  		PrintWriter pw = new PrintWriter(System.out);
         
          int t = scan.nextInt();
          while(t-->0){
              int n = scan.nextInt();
              int k = scan.nextInt();
              ArrayList<Integer> a = new ArrayList<>();
              for(int i=0;i<n;i++){
                  int x = scan.nextInt();
                  a.add(x);
              }
              Collections.sort(a);
              int i = n-2*k;
              int j = n-k;
              int sum = 0;
              int x = 0;
              while(x<i){
                  sum = sum+a.get(x);
                  x++;
              }
              while(j<n){
                  sum = sum+a.get(i)/a.get(j);
                  i++;
                  j++;
              }
              pw.println(sum);
              pw.flush();
          }
              
      }
        
          //static long bin_exp_mod(long a,long n){
              
          //    long res = 1;
              
          //    if(a==0)
          //    return 0;
          //    while(n!=0){
          //        if(n%2==1){
          //            res = ((res)*(a));
          //        }
          //           n = n/2;
          //            a = ((a)*(a));
          //    }
             
          //    return res;
          //}
      //static long bin_exp_mod(long a,long n){
  	//    long mod = 998244353;
  	//    long res = 1;
  	//    a = a%mod;
  	//    if(a==0)
  	//    return 0;
  	//    while(n!=0){
  	//        if(n%2==1){
  	//            res = ((res%mod)*(a%mod))%mod;
  	//        }
  	//           n = n/2;
  	//            a = ((a%mod)*(a%mod))%mod;
  	//    }
  	//    res = res%mod;
  	//    return res;
  	//}
     static long gcd(long a,long b){
         if(a==0)
         return b;
         return gcd(b%a,a);
     }
  //   static long lcm(long a,long b){
  //       return (a/gcd(a,b))*b;
  //   }
  }
  //class Pair{
  //    int x,y;
  //    Pair(int x,int y){
  //        this.x = x;
  //        this.y = y;
  //    }
  //}
  //    public boolean equals(Object obj) {
  //        // TODO Auto-generated method stub
  //        if(obj instanceof Pair)
  //        {
  //            Pair temp = (Pair) obj;
  //            if(this.x.equals(temp.x) && this.y.equals(temp.y))
  //                return true;
  //        }
  //        return false;
  //    }
  
  //    @Override
  //    public int hashCode() {
  //        // TODO Auto-generated method stub
          
  //        return (this.x.hashCode() + this.y.hashCode());        
  //    }
  //}
  //class Compar implements Comparator<Pair>{
  //    public int compare(Pair p1,Pair p2){
  //        if(p1.y>p2.y)
  //        return 1;
  //        else
  //        return -1;
  //    }
  //}