The compass leads you to an underground chamber covered in numbers carved into the walls — a maze of digits that glows in mysterious patterns.
The inscription reads: “Only the even paths shall open.”
Given a vector a of numbers, extract and return a new vector b containing only the even numbers, preserving their original order.
These even numbers form the correct path through the Maze of Numbers.
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Last Solution submitted on Mar 04, 2026

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Doddy Kastanya Thilanka Udara Lorenzo Anna Peles

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