All Questions
Tagged with programming-challengepython-3.x
46 questions
7votes
3answers
3kviews
Efficiency of Project Euler problem 35
The number, 197, is called a circular prime because all rotations of the digits: 197, 971, and 719, are themselves prime. There are thirteen such primes below 100: 2, 3, 5, 7, 11, 13, 17, 31, 37, 71, ...
- 245
7votes
2answers
6kviews
Character Picture Grid exercise - automatetheboringstuff
Regarding the Character picture exercise located at the end the following page: https://automatetheboringstuff.com/chapter4/ Say you have a list of lists where each value in the inner lists is a ...
- 115
12votes
2answers
4kviews
CodeFights: Pipes game
Description Carlos always loved playing video games, especially the well-known computer game "Pipes". Today he finally decided to write his own version of the legendary game from scratch. In ...
- 11.7k
7votes
2answers
447views
Finding min and max values of an iterable on the fly
This is a follow up for my question about optimizing solution for DNA Health HackerRank problem. Short re-cap: You are given 2 arrays (genes and ...
3votes
1answer
259views
Cave explorer: using stack
Story Original Link written in korean Frodo, a backcountry explorer, came to explore an underground cave with n rooms during his expedition. All rooms are numbered 0 through n-1. There are many, the ...
- 191
1vote
1answer
396views
Project Euler 34 # Digit Factorials in Python
145 is a curious number, as 1! + 4! + 5! = 1 + 24 + 120 = 145. Find the sum of all numbers which are equal to the sum of the factorial of their digits. Note: as 1! = 1 and 2! = 2 are not sums they are ...
user203258
18votes
5answers
3kviews
Flipping coins performance
This is the Flipping coins problem on CodeChef: There are \$N\$ coins kept on the table, numbered from \$0\$ to \$N - 1\$. Initially, each coin is kept tails up. You have to perform two types of ...
- 283
15votes
2answers
1kviews
Project Euler #22 - Names Scores
I programmed Problem #22 from Project Euler in Python. It works but I want to know if it really is pythonic enough. Using names.txt (right click and 'Save Link/Target As...'), a 46K text file ...
- 938
14votes
1answer
328views
Recover flights from found tickets
I just found a whole bunch of plane tickets that only have a start and destination on them. I also know the route started in a certain city. I would like to recover the (alphabetically) first possible ...
- 459
13votes
5answers
9kviews
"Algorithmic Crush" problem hitting timeout errors
This is the HackerRank problem Algorithmic Crush: You are given a list of size N, initialized with zeroes. You have to perform ...
- 231
12votes
1answer
1kviews
Print the string equivalents of a phone number
Task Old mobile phones had the ability to type characters by pressing a number. The letter a could be typed by pressing 2 once. ...
- 2,133
11votes
4answers
2kviews
Leetcode 93: Restore IP Addresses
(Source: Leetcode 93: Restore IP Addresses [Medium])(Topics: [String] [Backtracking]) The problem is as follows: Definition: A valid IP address is defined to consist of exactly four integers ...
- 499
8votes
4answers
2kviews
Coin Flip Streaks - correct streak condition
This is a practice task from Automate the Boring Stuff with Python. I imagine many others have asked for their version of the solution to be checked, so I apologise beforehand for boring you yet ...
- 91
7votes
2answers
6kviews
Sherlock and The Beast
I have recently written the program for the Sherlock and The Beast' HackerRank challenge. That's working fine, but the problem is that it takes too much time if a big number is given as a input. I ...
7votes
1answer
2kviews
Python program to find a word ladder transforming "four" to "five"
I saw this Puzzling problem and thought I would try to write a Python program to solve it. The task is to transform "four" to "five", forming a new four-letter word at each step, replacing one letter ...
- 443
