189. Rotate Array

Posted 2020-09-09 Premiumlab

https://leetcode.com/problems/rotate-array/#/description

 

Restatement

Rotate an array of n elements to the right by k steps.

For example, with n = 7 and k = 3, the array [1,2,3,4,5,6,7] is rotated to [5,6,7,1,2,3,4].

Note:
Try to come up as many solutions as you can, there are at least 3 different ways to solve this problem.

 

Analysis

 

class Solution(object):
    def rotate(self, nums, k):
        for p in range(0, len(nums)-1):
             nums[p], nums[p+1] = nums[p+1], nums[p]
     #   for p in range(0, k-1):
      #      nums[p], nums[p+1] = nums[p+1], nums[p]
      #  for p in range(k, len(nums)-1):
       #     nums[p], nums[p+1] = nums[p+1], nums[p]