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1. 

   szuxjq
   Member

   某知名网站的讨论，
   For example, given a MxN (3x4) two dimensional array

   1, 2, 3, 4
   5, 6, 7, 8
   9,10,11,12

   You need to rearrange it into:

   9 , 5, 1,
   10, 6, 2,
   11, 7, 3,
   12, 8, 4

   Write a function to do it in-place.

   e.g. M=3, N=4, and a memory block contains:
   [1,2,3,4,5,6,7,8,9,10,11,12]

   You need to change the memory block into
   [9,5,1,10,6,2,11,7,3,12,8,4]

   "In-place" means memory constaint is O(1).

   发布于 7 月 之前 #

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