Hackerrank

HackerRank Python

Capitalize!

You are asked to ensure that the first and last names of people begin with a capital letter in their passports. For example, alison heck should be capitalised correctly as Alison Heck.

HackerRank Python

Nested Lists

Given the names and grades for each student in a class of students N, store them in a nested list and print the name(s) of any student(s) having the second lowest grade.

Write a function

An extra day is added to the calendar almost every four years as February 29, and the day is called a leap day. It corrects the calendar for the fact that our planet takes approximately 365.25 days to orbit the sun. A leap year contains a leap day.

ginortS

You are given a string S.
S contains alphanumeric characters only.

Your task is to sort the string S in the following manner:

• All sorted lowercase letters are ahead of uppercase letters.
• All sorted uppercase…

Iterables and Iterators

The itertools module standardizes a core set of fast, memory efficient tools that are useful by themselves or in combination. Together, they form an iterator algebra making it possible to construct specialized tools succinctly and efficiently in pure Python.

Validating Credit Card Numbers

You and Fredrick are good friends. Yesterday, Fredrick received credit cards from ABCD Bank. He wants to verify whether his credit card numbers are valid or not. You happen to be great at regex so he is asking for your help!

Validating Email Addresses With a Filter

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

Valid email addresses must follow these rules:

Company Logo

A newly opened multinational brand has decided to base their company logo on the three most common characters in the company name. They are now trying out various combinations of company names and logos based on this condition. Given a string , which is the company name in lowercase letters, your task is…

Find a string

In this challenge, the user enters a string and a substring. You have to print the number of times that the substring occurs in the given string. String traversal will take place from left to right, not from right to left.

Triangle Quest 2

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

For example, a palindromic triangle of size is:

1
121
12321
1234321
123454321