Codeforces problems scrapper

script.php

<?php

$data = file_get_contents('https://codeforces.com/api/problemset.problems?tags=greedy');
$data = json_decode($data, true)['result']['problems'];

$out = collect($data)
  	->filter(function($row){  
		return isset($row['rating']) && $row['rating'] >= 500;
  	})
	->sortBy('rating')
  	->map(function($row){
	 	return [
			'contest' => $row['contestId'].$row['index'],
			'name' => $row['name'],
			'rating' => $row['rating'],
			'link' => "https://codeforces.com/contest/{$row['contestId']}/problem/{$row['index']}",
			'tags' => implode(', ', $row['tags'])
		];
	})
  	->values()->toJson()
;

file_put_contents('/home/greedy.json', $out);