Leetcode: Given an integer array nums and an integer val, remove all occurrences of val in nums in-place. The relative order of the elements may be changed.

Since it is impossible to change the length of the array in some languages, you must instead have the result be placed in the first part of the array nums. More formally, if

LeetCode : Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target.

Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target. You may assume that each input would have exactly one solution, and you may

Nested Lists in Python

Nested lists are Python representations of two dimensional arrays. They are used to represent lists of lists. For example, a list of grocery lists for the month or matrices we can

Slicing Python Strings

Python comes with a string slicing system, Slicing is nothing but fetching a piece from a pie. Square Bracket [] notation allows us to slice Python strings to get one