LeetCode 189 Rotate Array

题目：

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.

解决方案(C++)：

class Solution {
public:
    void rotate(int nums[], int n, int k) {
        k%=n;
        int *r=new int[k];
        for(int i=0;i<k;i++){
            r[i]=nums[i+n-k];
        }
        for(int i=n-1;i>k-1;i--){
            nums[i]=nums[i-k];
        }
        for(int i=0;i<k;i++){
            nums[i]=r[i];
        }
    }
};