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11.php
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11.php
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<?php
function calc($c) {
$counts = $c;
while ($counts['sw'] > 0 && $counts['ne'] > 0) {
$counts['sw']--;
$counts['ne']--;
}
while ($counts['se'] > 0 && $counts['nw'] > 0) {
$counts['se']--;
$COunts['nw']--;
}
while ($counts['n'] > 0 && $counts['s'] > 0) {
$counts['s']--;
$counts['n']--;
}
if($counts['n'] > 0 && $counts['se'] > 0) {
while($counts['n'] > 0 && $counts['se'] > 0) {
$counts['ne']++;
$counts['se']--;
$counts['n']--;
}
} elseif($counts['s'] > 0 && $counts['ne'] > 0) {
while($counts['s'] > 0 && $counts['ne'] > 0) {
$counts['se']++;
$counts['ne']--;
$counts['s']--;
}
} elseif($counts['n'] > 0 && $counts['sw'] > 0) {
while($counts['n'] > 0 && $counts['sw'] > 0) {
$counts['nw']++;
$counts['sw']--;
$counts['n']--;
}
} elseif($counts['s'] > 0 && $counts['nw'] > 0) {
while($counts['s'] > 0 && $counts['nw'] > 0) {
$counts['sw']++;
$counts['nw']--;
$counts['s']--;
}
}
return $counts;
}
function partA()
{
$contents = trim(file_get_contents('11-input.txt'));
$inputs = explode(",", $contents);
$counts = [ 'nw' => 0, 'ne' => 0, 'se' => 0, 'sw' => 0, 'n' => 0, 's' => 0 ];
foreach ($inputs as $step) {
$counts[$step]++;
}
while ($counts['sw'] > 0 && $counts['ne'] > 0) {
$counts['sw']--;
$counts['ne']--;
}
while ($counts['se'] > 0 && $counts['nw'] > 0) {
$counts['se']--;
$counts['nw']--;
}
while ($counts['n'] > 0 && $counts['s'] > 0) {
$counts['s']--;
$counts['n']--;
}
$counts = calc($counts);
$total = array_sum($counts);
echo 'Part A: ' . $total . PHP_EOL;
}
function partB()
{
$contents = trim(file_get_contents('11-input.txt'));
$inputs = explode(",", $contents);
$max = 0;
$counts = [ 'nw' => 0, 'ne' => 0, 'se' => 0, 'sw' => 0, 'n' => 0, 's' => 0 ];
foreach ($inputs as $step) {
$counts[$step]++;
$c = calc($counts);
$total = array_sum($c);
if ($total > $max) {
$max = $total;
}
}
echo 'Part B: ' . $max . PHP_EOL;
}
partA();
echo PHP_EOL;
partB();