Amazon Online Assessment (OA) - Count Rotations
A sorted list of unique integers is rotated clockwise k times. The function count_rotations() is given the rotated list rlist and size, the size of rlist, and is expected to return the value of k.
Examples
Example 1:
Input:
rlist = [100, 12, 50]
Output: 1
Explanation:
The original sorted list [12, 50, 100] was rotated clockwise 1 time to become [100, 12, 50].
count_rotations() calls another function count_rotations_helper() which takes in 3 parameters:
rlist: a rotated sorted list of unique integers,head: the index of the first value of the sorted list,end: the index of the last value of the sorted list. The helper function computes the valuekand passes the result back tocount_rotations().
The current implementation of the functions compiles successfully but does not return the correct result consistently because of some error in count_rotations_helper(). Please fix the code so that it passes all test cases.
Try it yourself
Solution
Title
Script
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>>> a = [1, 2, 3]
>>> a[-1]
3