Please try to solve a harder version "Problem 44448. Project Euler: Problem 14 Longest Collatz sequence"
Sums with Excluded Digits
All your base are belong to us
Project Euler: Problem 4, Palindromic numbers
Make a run-length companion vector
Change the sign of even index entries of the reversed vector
Without the French accent please!
Numbers spiral diagonals (Part 2)
Add more zeros
Find files with extension ext in the current directory
I want to know everything!
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