You are given three integers ‘X’, ‘Y’ and ‘N’. Find the value of division X / Y up to ‘N’ decimal places.

You are given a string (STR) of length N.

Your task is to find the longest palindromic substring. If there is more than one palindromic substring with the maximum len...

You are given two strings S and X containing random characters. Your task is to find the smallest substring in S which contains all the characters present in X.

Example:

A binary tree is a tree where each node has at most two children i.e left child and right child.

You are given a binary tree, where the structure of the node is as follow -:

You have been given two arrays, 'AT' and 'DT', representing the arrival and departure times of all trains that reach a railway station.