LeetCode Q189: Rotate Array

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.

More solutions are shown in https://leetcode.com/discuss/27387/summary-of-c-solutions

My Solution:

	class Solution {
	public:
	void rotate(vector<int>& nums, int k) {
	k=k%nums.size();
	reverse(nums.begin(), nums.end());
	reverse(nums.begin(), nums.begin()+k);
	reverse(nums.begin()+k, nums.end());
	}
	};

view raw Q189RotateArray.cpp hosted with ❤ by GitHub