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Reverse array in groups
Submissions: 19909   Accuracy:

29.87%

  Difficulty: Basic
     

Given an array of positive integers. Reverse every sub-array of K group elements.

Input:
The first line of input contains a single integer T denoting the number of test cases. Then T test cases follow. Each test case consist of two lines of input. The first line of each test case consists of an integer N(size of array) and an integer K separated by a space. The second line of each test case contains N space separated integers denoting the array elements.

Output:
For test case, print the modified array.

Constraints:
1 ≤ T ≤ 200
1 ≤ N ≤ 107
1 ≤ A[i] ≤ 1018

Example:
Input
1
5 3
1 2 3 4 5

Output
3 2 1 5 4

** For More Input/Output Examples Use 'Expected Output' option **

Author: rajatjha


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