<?php
$file = __DIR__ . '/input.txt';
$moves = str_split(file_get_contents($file), 2);
$santa = new Position(0, 0);
$robo = new Position(0, 0);
$houses[$santa->toString()] = 1;
$houses[$robo->toString()] = 1;
foreach ($moves as $move) {
list($santaMove, $roboMove) = str_split($move);
$santa->move($santaMove);
$robo->move($roboMove);
$houses[$santa->toString()] = 1;
$houses[$robo->toString()] = 1;
}
echo "Houses: " . count($houses) . "\n";
class Position
{
private $x;
private $y;
/**
* Position constructor.
* @param int $x
* @param int $y
*/
public function __construct($x, $y)
{
$this->x = (int) $x;
$this->y = (int) $y;
}
public function move($char)
