Vitalii Honcharuk EXayer

## numberAbbreviation.php
<?php
/**
 * Shorten large numbers into abbreviations (i.e. 1,500 = 1.5k)
 *
 * @param int    $number  Number to shorten
 * @return String   A number with a symbol
 */
function numberAbbreviation($number) {
    $abbrevs = [1000000000000 => 'T', 1000000000 => 'B', 1000000 => 'M', 1000 => 'K', 1 => ''];

## the_monty_hall_problem.js
const CHANCE = 3;

function rollDoor() {
    return Math.floor(Math.random() * CHANCE);
}

function randArr(arr) {
    return arr[Math.floor(Math.random() * arr.length)];
}

## count_rectangles_inside_matrix.php
<?php

/**
 * Counts all rectangles inside matrix by loop.
 *
 * For 3x3:
 *  *_*_*   // 1x1 = 4
 *  *_*_*   // 1x2 = 2
 *  * * *   // 2x1 = 2
 *          // 2x2 = 1

## count_squares_in_matrix.php
<?php

/**
 * Counts squares in matrix by loop.
 *
 * @param int $n
 * @param int $m
 * @return int
 */
function countSquares(int $m, int $n): int
	<?php
	/**
	* Shorten large numbers into abbreviations (i.e. 1,500 = 1.5k)
	*
	* @param int $number Number to shorten
	* @return String A number with a symbol
	*/
	function numberAbbreviation($number) {
	$abbrevs = [1000000000000 => 'T', 1000000000 => 'B', 1000000 => 'M', 1000 => 'K', 1 => ''];
	const CHANCE = 3;

	function rollDoor() {
	return Math.floor(Math.random() * CHANCE);
	}

	function randArr(arr) {
	return arr[Math.floor(Math.random() * arr.length)];
	}
	<?php

	/**
	* Counts all rectangles inside matrix by loop.
	*
	* For 3x3:
	* __* // 1x1 = 4
	* __* // 1x2 = 2
	* * * * // 2x1 = 2
	* // 2x2 = 1
	<?php

	/**
	* Counts squares in matrix by loop.
	*
	* @param int $n
	* @param int $m
	* @return int
	*/
	function countSquares(int $m, int $n): int