Remove nth node from end of list | Python | Leetcode 19
Given the head of a linked list, remove the nth node from the end of the list and return its head. Example 1: Input: head = [1,2,3,4,5], n = 2 Output: [1,2,3,5] Example 2:…
Linked Lists in Python – Everything you need to know as a programmer
Linked List is a linear and dynamic data structure that consists of series of nodes connected to each other. The elements are not stored contiguously, but linked with pointers . In linked list each…
Linked Lists: Everything you need to know as a programmer
Linked List is a linear and dynamic data structure that consists of series of nodes connected to each other. The elements are not stored contiguously, but linked with pointers .In…
Lists in Python – Everything you need to know as a programmer
Lists are used to store multiple items in a single variable. We can store different data types in a list. List items are ordered, changeable, and allow duplicate values. Indexing start from…
Python Arrays: Everything you need to know as a programmer
An array is a container that stores and organizes items sequentially. They are an ordered collection of elements and each value belongs to the same data type. Indexing of the…
Arrays | Static and Dynamic – Everything you need to know
An array is a container that stores and organizes items sequentially. They are an ordered collection of elements and each value belongs to the same data type. Indexing of the…
Check If A Number Is Power Of Two | Python | Leetcode 231
Question Given an integer n, return true if it is a power of two. Otherwise, return false. An integer n is a power of two, if there exists an integer x such that n == 2x. Example 1: Input:…
Number of Days Between Two Dates | Python | Leetcode 1360
Question Write a program to count the number of days between two dates. The two dates are given as strings, their format is YYYY-MM-DD as shown in the examples. Example 1: Input:…
Big O Notation – Analysis of Time and Space Complexity
When we develop an algorithm, we need to analyze its performance. We need to compare the efficiency of different solutions to a problem. There are two important criteria to analyze…
Numbers in Python: Everything you should clearly know as a beginner.
In Python, there are three types of numeric data: integers, floating-point numbers, and complex numbers. my_number = 7 # int my_float = 7.0 # float my_complex = 5+7j # complex…