HackerRank Python Programming Solutions

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12 min readNov 11, 2021

Piling Up in python - HackerRank Solution

There is a horizontal row of n cubes. The length of each cube is given. You need to create a new vertical pile of…

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Linear Algebra in Python - HackerRank Solution

The NumPy module also comes with a number of built-in routines for linear algebra calculations. These can be found in…

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Polynomials in Python - HackerRank Solution

Poly The poly tool returns the coefficients of a polynomial with the given sequence of roots. roots The roots tool…

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Inner and Outer in Python - HackerRank Solution

innerThe inner tool returns the inner product of two arrays. import numpy A = numpy.array([0, 1]) B = numpy.array([3…

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Dot and Cross in Python - HackerRank Solution

dot The dot tool returns the dot product of two arrays. import numpy A = numpy.array([1, 2 ]) B = numpy.array([3, 4 ])…

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Mean, Var, and Std in Python - HackerRank Solution

mean The mean tool computes the arithmetic mean along the specified axis. import numpy my_array = numpy.array([ [1, 2]…

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Min and Max in Python - HackerRank Solution

Min The tool min returns the minimum value along a given axis. import numpy my_array = numpy.array([[2, 5], [3, 7], [1…

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Sum and Prod in Python - HackerRank Solution

Sum The sum tool returns the sum of array elements over a given axis. import numpy my_array = numpy.array([ [1, 2], [3…

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Floor, Ceil and Rint in Python HackerRank Solution

floorThe tool floor returns the floor of the input element-wise.The floor of x is the largest integer i where i = x…

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Array Mathematics in Python - HackerRank Solution

Basic mathematical functions operate element-wise on arrays. They are available both as operator overloads and as…

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Eye and Identity in Python - HackerRank Solution

identity : The identity tool returns an identity array. An identity array is a square matrix with all the main diagonal…

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Zeros and Ones in Python - HackerRank Solution

zeros The zeros tool returns a new array with a given shape and type filled with 0's. import numpy print…

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Concatenate in Python - HackerRank Solution

Two or more arrays can be concatenated together using the concatenate function with a tuple of the arrays to be joined…

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Transpose and Flatten in Python - HackerRank Solution

We can generate the transposition of an array using the tool numpy.transpose.It will not affect the original array, but…

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Shape and Reshape in Python - HackerRank Solution

Shape :The shape tool gives a tuple of array dimensions and can be used to change the dimensions of an array.(a). Using…

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Arrays in Python - HackerRank Solution

The NumPy (Numeric Python) package helps us manipulate large arrays and matrices of numeric data.To use the NumPy…

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Default Arguments in Python - HackerRank Solution

In this challenge, the task is to debug the existing code to successfully execute all provided test files.Python…

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Words Score in Python - HackerRank Solution

In this challenge, the task is to debug the existing code to successfully execute all provided test files.Consider that…

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Decorators 2 - Name Directory in Python - HackerRank Solution

Let's use decorators to build a name directory! You are given some information about N people. Each person has a first…

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Standardize Mobile Number Using Decorators in python - HackerRank Solution

Let's dive into decorators! You are given N mobile numbers. Sort them in ascending order then print them in the…

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XML 2 - Find the Maximum Depth in Python - HackerRank Solution

You are given a valid XML document, and you have to print its score. The score is calculated by the sum of the score of…

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XML 1 - Find the Score in Python - HackerRank Solution

You are given a valid XML document, and you have to print its score. The score is calculated by the sum of the score of…

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Matrix Script in Python - HackerRank Solution

Neo has a complex matrix script. The matrix script is a N X M grid of strings. It consists of alphanumeric characters…

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Validating Postal Codes in Python - HackerRank Solution

A valid postal code P have to fullfil both below requirements: P must be a number in the range from 100000 to 999999…

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Validating Credit Card Numbers in Python HackerRank Solution

You and Fredrick are good friends. Yesterday, Fredrick received N credit cards from ABCD Bank. He wants to verify…

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Validating UID in Python - HackerRank Solution

ABCXYZ company has up to 100 employees.The company decides to create a unique identification number (UID) for each of…

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Detect HTML Tags, Attributes and Attribute Values in Python - HackerRank Solution

You are given an HTML code snippet of N lines.Your task is to detect and print all the HTML tags, attributes and…

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HTML Parser - Part 2 in Python - HackerRank Solution

This section assumes that you understand the basics discussed in HTML Parser - Part 1 .handle_comment(data) This method…

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HTML Parser - Part 1 in python - HackerRank Solution

Hypertext Markup Language is a standard markup language used for creating World Wide Web pages. Parsing is the process…

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Hex Color Code in Python - HackerRank Solution

CSS colors are defined using a hexadecimal (HEX) notation for the combination of Red, Green, and Blue color values…

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Validating and Parsing Email Addresses in Python - HackerRank Solution

A valid email address meets the following criteria: It's composed of a username, domain name, and extension assembled…

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Validating phone number in Python - HackerRank Solution

Let's dive into the interesting topic of regular expressions! You are given some input, and you are required to check…

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Validating Roman Numerals in Python - HackerRank Solution

You are given a string, and you have to validate whether it's a valid Roman numeral. If it is valid, print True…

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Regex Substitution in Python - HackerRank Solution

The re.sub() tool (sub stands for substitution) evaluates a pattern and, for each valid match, it calls a method (or…

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Re.start() & Re.end() in Python - HackerRank Solution

These expressions return the indices of the start and end of the substring matched by the group. Code : Task : You are…

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Re.findall() & Re.finditer() in Python - HackerRank Solution

The expression re.findall() returns all the non-overlapping matches of patterns in a string as a list of strings.

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Group() Groups() Groupdict() in Python - HackerRank Solution

A group() expression returns one or more subgroups of the match. Code : >>>import re >>> m =…

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Re.split() in python - hackerrank solution

re.split() The re.split() expression splits the string by occurrence of a pattern. >>>import re >>>…

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Detect Floating Point Number in Python - HackerRank Solution

A regular expression (or RegEx) specifies a set of strings that matches it.A regex is a sequence of characters that…

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Reduce Function in Python - HackerRank Solution

Given a list of rational numbers,find their product. Concept : The reduce() function applies a function of two…

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Validating Email Addresses With a Filter in Python - HackerRank Solution

You are given an integer N followed by N email addresses. Your task is to print a list containing only valid email…

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Map and Lambda Function in Python - HackerRank Solution

Let's learn some new Python concepts! You have to generate a list of the first N fibonacci numbers, 0 being the first…

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ginortS in python - HackerRank Solution

You are given a string S.S contains alphanumeric characters only. Your task is to sort the string S in the following…

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Any or All in python - HackerRank Solution

This expression returns True if any element of the iterable is true.If the iterable is empty, it will return False…

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Athlete Sort in python - HackerRank Solution

You are given a spreadsheet that contains a list of N athletes and their details (such as age, height, weight and so…

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Python Evaluation - HackerRank Solution

The eval() expression is a very powerful built-in function of Python. It helps in evaluating an expression. The…

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Input() in python - HackerRank Solution

This challenge is only forPython 2.input()in Python 2, the expression input() is equivalent to eval(raw…

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Zipped in python - HackerRank Solution

zip([iterable, ...]) This function returns a list of tuples. The i th tuple contains the i th element from each of the…

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Class 2 - Find the Torsional Angle in Python - HackerRank Solution

You are given four points A, B, c and D in a 3-dimensional Cartesian coordinate system. You are required to print the…

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Classes Dealing with Complex Numbers in python - HackerRank Solution

For this challenge, you are given two complex numbers, and you have to print the result of their addition, subtraction…

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Incorrect Regex in Python - HackerRank Solution

You are given a string S.Your task is to find out whether S is a valid regex or not. Input Format : The first line…

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Exceptions in Python - HackerRank Solution

Exceptions Errors detected during execution are called exceptions.Example : ZeroDivisionError This error is raised when…

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Time Delta in Python - HackerRank Solution

When users post an update on social media,such as a URL, image, status update etc., other users in their network are…

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Calendar Module in Python - HackerRank Solution

Calendar Module The calendar module allows you to output calendars and provides additional useful functions for them…

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Company Logo in python - HackerRank Solution

A newly opened multinational brand has decided to base their company logo on the three most common characters in the…

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Collections.deque() in python - HackerRank Solution

You are given n words. Some words may repeat. For each word, output its number of occurrences. The output order should…

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Word Order in python - HackerRank Solution

You are given n words. Some words may repeat. For each word, output its number of occurrences. The output order should…

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Collections.OrderedDict() in Python - HackerRank Solution

collections.OrderedDict An OrderedDict is a dictionary that remembers the order of the keys that were inserted first…

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Collections.namedtuple() in Python - HackerRank Solution

collections.namedtuple() Basically, namedtuples are easy to create, lightweight object types.They turn tuples into…

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DefaultDict Tutorial in Python - HackerRank Solution

The defaultdict tool is a container in the collections class of Python. It's similar to the usual dictionary (dict)…

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collections.Counter() in Python - Hacker Rank Solution

collections.Counter() A counter is a container that stores elements as dictionary keys, and their counts are stored as…

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Maximize It in python - HackerRank Solution

You are given a function f(x) = x^2. You are also given k lists. The ith list consists of Ni elements. You have to pick…

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Iterables and Iterators in Python - HackerRank Solution

The itertools module standardizes a core set of fast, memory efficient tools that are useful by themselves or in…

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Compress the String in python - HackerRank Solution

In this task, we would like for you to appreciate the usefulness of the groupby() function of itertools . To read more…

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itertools.combinations_with_replacement() in python - Hacker Rank Solution

itertools.combinations_with_replacement(iterable, r) This tool returns r length subsequences of elements from the input…

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itertools.combinations() in Python - HackerRank Solution

itertools.combinations(iterable, r) This tool returns the r length subsequences of elements from the input…

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itertools.permutations() in Python - HackerRank Solution

itertools.permutations(iterable[, r]) This tool returns successive r length permutations of elements in an iterable.If…

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itertools.product() in Python - HackerRank Solution

itertools.product() This tool computes the cartesian product of input iterables.It is equivalent to nested…

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Triangle Quest in Python - HackerRank Solution

You are given a positive integer N. Print a numerical triangle of height N - 1 like the one below: Can you do it using…

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Integers Come In All Sizes in Python - HackerRank Solution

Integers in Python can be as big as the bytes in your machine's memory. There is no limit in size as there is: 2^31 - 1…

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Power and Mod Power in Python - HackerRank Solution

So far, we have only heard of Python's powers. Now, we will witness them!Powers or exponents in Python can be…

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Mod Divmod in Python - Hacker Rank Solution

One of the built-in functions of Python is divmod, which takes two arguments a and b and returns a tuple containing the…

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Triangle Quest 2 in Python - HackerRank Solution

You are given a positive integer N.Your task is to print a palindromic triangle of size N.For example, a palindromic…

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Find Angle MBC in python - HackerRank Solution

ABC is a right triangle, 90° at B.Therefore, ABC = 90°.Point M is the midpoint of hypotenuse AC.You are given the…

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Polar Coordinates in Python - HackerRank Solution

Polar coordinates are an alternative way of representing Cartesian coordinates or Complex Numbers.A complex number zis…

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Check Strict Superset in Python - HackerRank Solution

You are given a set A and n other sets.Your job is to find whether set A is a strict superset of each of the N…

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Check Subset in python - HackerRank Solution

You are given two sets, A and B.Your job is to find whether set A is a subset of set B.If set A is subset of set B…

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Set Mutations in python - HackerRank Solution

We have seen the applications of union, intersection, difference and symmetric difference operations, but these…

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Set .symmetric_difference() Operation in python - HackerRank Solution

symmetric_difference()The .symmetric_difference() operator returns a set with all the elements that are in the set and…

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Set .intersection() Operation in python - HackerRank Solution

intersection() The .intersection() operator returns the intersection of a set and the set of elements in an…

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set.union() Operators in Python - HackerRank Solution

set.union() Operators in Python - HackerRank Solution .union() The .union() operator returns the union of a set and the…

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Set discard() remove() and pop() in Python - HackerRank Solution

remove(x) This operation removes element x from the set.If element x does not exist, it raises a KeyError.The…

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Set Add() in Python - HackerRank Solution

If we want to add a single element to an existing set, we can use the .add() operation.It adds the element to the set…

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Symmetric Difference in Python - HackerRank Solution

Objective Today, we're learning about a new data type: sets. Concept If the inputs are given on one line separated by a…

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No Idea in python - HackerRank Solution

There is an array of n integers. There are also 2 disjoint sets, A and B, each containing m integers. You like all the…

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Introduction to Sets in Python - HackerRank Solution

A set is an unordered collection of elements without duplicate entries.When printed, iterated or converted into a…

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Merge the Tools in python - HackerRank Solution

Consider the following: A string, s, of length n where s = c0c1.....cn-1. An integer, k, where k is a factor of n. We…

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The Minion Game in Python - HackerRank Solution

Kevin and Stuart want to play the ' The Minion Game '. Game RulesBoth players are given the same string, S.Both players…

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Capitalize in Python - HackerRank Solution

You are asked to ensure that the first and last names of people begin with a capital letter in their passports. For…

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Alphabet Rangoli in Python - HackerRank Solution

You are given an integer, N. Your task is to print an alphabet rangoli of size N. (Rangoli is a form of Indian folk art…

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String Formatting in Python - HackerRank Solution

Given an integer , n, print the following values for each integer i from 1to n : The four values must be printed on a…

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Designer Door Mat in Python - HackerRank Solution

Mr. Vincent works in a door mat manufacturing company. One day, he designed a new door mat with the following…

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Text Wrap in Python - HackerRank Solution

You are given a string S and width W .Your task is to wrap the string into a paragraph of width W . Function…

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String Validators in Python - HackerRank Solution

Python has built-in string validation methods for basic data. It can check if a string is composed of alphabetical…

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Text Allignment in Python - HackerRank Solution

In Python, a string of text can be aligned left, right and center. .ljust(width)This method returns a left aligned…

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Find a string in Python - HackerRank Solution

In this challenge, the user enters a string and a substring. You have to print the number of times that the substring…

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Mutations in Python - HackerRank Solution

We have seen that lists are mutable (they can be changed), and tuples are immutable (they cannot be changed).Let's try…

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What's Your Name? in Python - HackerRank Solution

You are given the firstname and lastname of a person on two different lines. Your task is to read them and print the…

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String Split and Join in Python - HackerRank Solution

In Python, a string can be split on a delimiter. For Example: >>> a = "this is a string" >>> a = a.split(" ") # a is…

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sWAP cASE in Python - HackerRank Solution

You are given a string and your task is to swap cases. In other words, convert all lowercase letters to uppercase…

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Tuples in Python - Hacker Rank Solution

Given an integer, n, and n space-separated integers as input, create a tuple, t, of those n integers. Then compute and…

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Lists in Python - Hacker Rank Solution

Consider a list ( list = []). You can perform the following commands: insert i e: Insert integer at position . print…

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Finding the percentage in Python - Hacker Rank Solution

The provided code stub will read in a dictionary containing key/value pairs of name:[marks] for a list of students…

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Nested Lists in Python - Hacker Rank Solution

Given the names and grades for each student in a class of N students, store them in a nested list and print the name(s)…

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Find the Runner-Up Score! in Python - Hacker Rank Solution

Given the participants' score sheet for your University Sports Day, you are required to find the runner-up score. You…

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List Comprehensions in Python - Hacker Rank Solution

Task Let's learn about list comprehensions! You are given three integers X ,Y and Z representing the dimensions of a…

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Print Function in Python - Hacker Rank Solution

The included code stub will read an integer,n , from STDIN. Without using any string methods, try to print the…

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Write a function in Python - Hacker Rank Solution

An extra day is added to the calendar almost every four years as February 29, and the day is called a leap day. It…

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Loops in Python - Hacker Rank Solution

Task The provided code stub reads and integer,n, from STDIN. For all non-negative integers, i < N, print i^2. Example…

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Python: Division - Hacker Rank Solution

Task The provided code stub reads two integers, a and b, from STDIN. Add logic to print two lines. The first line…

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Arithmetic Operators in Python - HackerRank Solution

Task The provided code stub reads two integers from STDIN, a and b. Add code to print three lines where: The first line…

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Python If-Else - Hacker Rank Solution

Input Format : A single line containing a positive integer, n . Constraints : Output Format : Print Weird if the number…

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