21, 'title' => 'Amicable numbers', 'description' => function(){ return file_get_contents(__DIR__ . '/Euler_Problem-021_description.md'); }, 'code' => function(){ return file_get_contents(__DIR__ . '/Euler_Problem-021.b93'); }, 'explanation' => function(){ return file_get_contents(__DIR__ . '/Euler_Problem-021_explanation.md'); }, 'url_euler' => 'http://projecteuler.net/problem=021', 'url_raw' => 'https://raw.githubusercontent.com/Mikescher/Project-Euler_Befunge/master/processed/Euler_Problem-021.b93', 'url_github' => 'https://github.com/Mikescher/Project-Euler_Befunge', 'abbreviated' => true, 'steps' => 601124986, 'time' => 102399, 'width' => 400, 'height' => 33, 'value' => 31626, ];