Please try to solve a harder version "Problem 44448. Project Euler: Problem 14 Longest Collatz sequence"
Swap the first and last columns
Maximum running product for a string of numbers
letter yes yes & letter no no
Calculate the area of a triangle between three points
BLOCK x3 (Version 4)
Replicate elements in vectors
Getting the indices from a matrice
Chess ELO rating system
Add more zeros
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