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Hackerrank

A collection of 419 issues

Hackerrank Collections Counter Solution

collections.Counter() A counter is a container that stores elements as dictionary keys, and their counts are stored as dictionary values. Sample Code >>> from collections import Counter >>> >>> myList = [1,1,2,3,4,5,3,2,3,4,2,1,2,

Hackerrank - Compress the String! Solution

In this task, we would like for you to appreciate the usefulness of the groupby() function of itertools . To read more about this function, Check this out . You are given a string . Suppose a character '' occurs consecutively times in the string. Replace these consecutive occurrences of the character

Hackerrank - Matrix Script Solution

Neo has a complex matrix script. The matrix script is a X grid of strings. It consists of alphanumeric characters, spaces and symbols (!,@,#,$,%,&). To decode the script, Neo needs to read each column and select only the alphanumeric characters and connect them. Neo reads the column from top to

Hackerrank - Text Alignment Solution

In Python, a string of text can be aligned left, right and center. .ljust(width) This method returns a left aligned string of length width. >>> width = 20 >>> print 'HackerRank'.ljust(width,'-') HackerRank---------- .center(width) This method returns a centered

Hackerrank Combination With Replacement Solution

itertools.combinations_with_replacement(iterable, r) This tool returns length subsequences of elements from the input iterable allowing individual elements to be repeated more than once. Combinations are emitted in lexicographic sorted order. So, if the input iterable is sorted, the combination tuples will be produced in sorted order. Sample

Hackerrank -itertools.combinations() Solution

itertools.combinations(iterable, r) This tool returns the length subsequences of elements from the input iterable. Combinations are emitted in lexicographic sorted order. So, if the input iterable is sorted, the combination tuples will be produced in sorted order. Sample Code >>> from itertools import combinations >>

Hackerrank - itertools.product() Solution

itertools.product() This tool computes the cartesian product of input iterables. It is equivalent to nested for-loops. For example, product(A, B) returns the same as ((x,y) for x in A for y in B). Sample Code >>> from itertools import product >>> >>

Hackerrank - Designer Door Mat Solution

Mr. Vincent works in a door mat manufacturing company. One day, he designed a new door mat with the following specifications: * Mat size must be X. ( is an odd natural number, and is times .) * The design should have 'WELCOME' written in the center. * The design pattern should only

Hackerrank - Alphabet Rangoli

You are given an integer, . Your task is to print an alphabet rangoli of size . (Rangoli is a form of Indian folk art based on creation of patterns.) Different sizes of alphabet rangoli are shown below: #size 3 ----c---- --c-b-c-- c-b-a-b-c --c-b-c-- ----c---- #size 5 --------e-------- ------e-d-e------ ----e-d-c-d-e---- --e-d-c-b-c-d-e-- e-d-c-b-a-b-c-d-e

Hackerrank - String Formatting Solution

Given an integer, , print the following values for each integer from to : 1. Decimal 2. Octal 3. Hexadecimal (capitalized) 4. Binary The four values must be printed on a single line in the order specified above for each from to . Each value should be space-padded to match the width of