Server Technology Engineer

You are given two Strings 'P' and 'Q' of equal length.

Your task is to return 1 if String 'P' can be converted into String 'Q' by cyclically rotating it to the right any number of times ( Possibly Zero ), else return 0.

A cyclic rotation to the right on String 'A' consists of taking String 'A' and moving the rightmost character to the leftmost position. For example, if 'A' = "pqrst", then it will be "tpqrs" after one cyclic rotation on 'A'.

For example:

Consider the two strings 'P' = "abfyg" and 'Q' = "gabfy" 

If we cyclically rotate String 'P' to the right once. The resulting string P becomes "gabfy" which is equal to String 'Q'. 

Therefore it is possible to convert String 'P' to String 'Q'.

Given a Binary Search Tree (BST) and a range [min, max], remove all keys which are outside the given range. The modified tree should also be BST.

Given an array ARR of N integers and an integer S. The task is to find whether there exists a subarray(positive length) of the given array such that the sum of elements of the subarray equals to S or not. If any subarray is found, return the start and end index (0 based index) of the subarray. Otherwise, consider both the START and END indexes as -1.

Note:

If two or more such subarrays exist, return any subarray.

For Example: If the given array is [1,2,3,4] and the value of S is equal to 7. Then there are two possible subarrays having sums equal to S are [1,2,3] and [3,4].