write a go solution for 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 lfloora_i/a_jrfloor to your score, where lfloorx/yrfloor 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 Format:
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<=lfloorn/2rfloor).

The second line contains n integers a_1,a_2,...,a_n (1<=a_i<=2*10^5).

Output Format:
Print one integer — the minimum possible score you can get.

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+lfloor1/2rfloor=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+lfloor1/3rfloor=0, the array becomes [1,1,1];
3. choose a_1=1 and a_2=1 for the operation; the score becomes 0+lfloor1/1rfloor=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+lfloor1/3rfloor=0, the array becomes [3,7];
2. choose a_1=3 and a_2=7 for the operation; the score becomes 0+lfloor3/7rfloor=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.. Output only the code with no comments, explanation, or additional text.