Taeluf.com

part1

#!/usr/bin/env php
<?php
/**
 * Find numbers on the left that are also on the right. The first match is worth 1 point. Each subsequent match doubles the points. Calculate the points of each game. Sum the games together.
 */

//$input = file_get_contents(__DIR__.'/sample1.txt');
$input = file_get_contents(__DIR__.'/input1.txt');

$expected_output = 13;

//$game_lines = explode("\n", trim($input));

$lines = explode("\n", trim($input));

$total = 0;

foreach ($lines as $l){
    $parts = explode(":",$l);
    $games = trim($parts[1]);
    $left = explode("|",$games)[0];
    $right = explode("|",$games)[1];
    $left_nums = array_map('trim',explode(" ", $left));
    $left_nums = array_combine($left_nums, $left_nums);
    $right_nums = array_map('trim',explode(" ", $right));
    $right_nums = array_combine($right_nums, $right_nums);

    $card_value = 0;
    echo "\n\n\nLeft Nums:\n";
    print_r($left_nums);
    echo "\n\n\nRight Nums:\n";
    print_r($right_nums);
    foreach ($left_nums as $num){
        if (!is_numeric($num))continue;
        if (isset($right_nums[$num])){
            echo "\n    Match $num";
            if ($card_value == 0) $card_value = 1;
            else $card_value = $card_value * 2;
        }
    }
    echo "\n  Card Value: $card_value";
    $total += $card_value;
}

echo "\nTotal: $total";