project_euler.problem_079.sol1

Project Euler Problem 79: https://projecteuler.net/problem=79

Passcode derivation

A common security method used for online banking is to ask the user for three random characters from a passcode. For example, if the passcode was 531278, they may ask for the 2nd, 3rd, and 5th characters; the expected reply would be: 317.

The text file, keylog.txt, contains fifty successful login attempts.

Given that the three characters are always asked for in order, analyse the file so as to determine the shortest possible secret passcode of unknown length.

Functions

find_secret_passcode(→ int)	Returns the shortest possible secret passcode of unknown length.
solution(→ int)	Returns the shortest possible secret passcode of unknown length

Module Contents

project_euler.problem_079.sol1.find_secret_passcode(logins: list[str]) → int

Returns the shortest possible secret passcode of unknown length.

>>> find_secret_passcode(["135", "259", "235", "189", "690", "168", "120",
...     "136", "289", "589", "160", "165", "580", "369", "250", "280"])
12365890

>>> find_secret_passcode(["426", "281", "061", "819" "268", "406", "420",
...     "428", "209", "689", "019", "421", "469", "261", "681", "201"])
4206819

project_euler.problem_079.sol1.solution(input_file: str = 'keylog.txt') → int

Returns the shortest possible secret passcode of unknown length for successful login attempts given by input_file text file.

>>> solution("keylog_test.txt")
6312980