Solving Wiggle Sort II in go. Please try yourself first to solve the problem and submit your implementation to LeetCode before looking into solution.

Problem Description

Given an unsorted array nums, reorder it such that nums[0] < nums[1] > nums[2] < nums[3]....

Example 1:

Input: nums = [1, 5, 1, 1, 6, 4]
Output: One possible answer is [1, 4, 1, 5, 1, 6].

Example 2:

Input: nums = [1, 3, 2, 2, 3, 1]
Output: One possible answer is [2, 3, 1, 3, 1, 2].

Note:

You may assume all input has valid answer.

Follow Up:

Can you do it in O(n) time and/or in-place with O(1) extra space?

Index :       0   1   2   3   4   5
Small half:   M       S       S    
Large half:       L       L       L(M)
13   6   5   5   4   2

         M
Step 1: 
Original idx: 0    1    2    3    4    5  
Mapped idx:   1    3    5    0    2    4 
Array:        13   6    5    5    4    2 
             Left
              i
                                      Right
Step 2: 
Original idx: 0    1    2    3    4    5  
Mapped idx:   1    3    5    0    2    4 
Array:        13   6    5    5    4    2 
                  Left
                   i
                                      Right
Step 3: 
Original idx: 0    1    2    3    4    5  
Mapped idx:   1    3    5    0    2    4 
Array:        13   6    5    5    4    2 
                  Left
                        i
                                     Right
Step 4: 
Original idx: 0    1    2    3    4    5  
Mapped idx:   1    3    5    0    2    4 
Array:        13   6    5    5    2    4 
                  Left
                        i
                               Right
Step 5: 
Original idx: 0    1    2    3    4    5  
Mapped idx:   1    3    5    0    2    4 
Array:        13   6    4    5    2    5 
                  Left
                        i
                            Right
Step 6: 
Original idx: 0    1    2    3    4    5  
Mapped idx:   1    3    5    0    2    4 
Array:        13   6    4    5    2    5 
                  Left
                             i
                            Right
Step Final: 
Original idx: 0    1    2    3    4    5  
Mapped idx:   1    3    5    0    2    4 
Array:        5    6    4    13   2    5 
                      Left
                                  i
                            Right

See the full details of the problem Wiggle Sort II at LeetCode

Originally posted at: @github.com/halfrost/LeetCode-Go