Problem D: Cut the stick

Problem D: Cut the stick

Time Limit: 1 Sec  Memory Limit: 128 MB
Submit: 2617  Solved: 943
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Lanran wants to cut one stick with length L into exactly N sticks with length \(L_i(i=1,2...N)\), so \(L = \sum{L_i}\). However, the cost to cut one stick in to two pieces is the length of the stick, that means cutting a stick with length x will cost x. Now he wants to know the minimal cost if he cuts stick optimally to get N sticks.


The first line will be an integer \(T (1 \leq T \leq 100)\), which is the number of test cases.
For each test data: 
The first line contains an integer N \((1 \leq N \leq 10^3 )\) — the number of sticks Lanran needs to get.
Then the next one line contains N  integers, the i-th integer \(L_i (1 \leq L_i \leq 10^5)\) indicates the length of N sticks Lanran wants to get.


For each case, contains one line,  print the minimal minimal cost.

Sample Input

1 4 2 6

Sample Output