44 lines
763 B
PHP
44 lines
763 B
PHP
<?php
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// Problem: https://adventofcode.com/2015/day/1
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/*
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* Solution 1
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*
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* Runtime: ~0.158ms
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*/
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function day1solution1() {
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$instructions = file_get_contents('./2015/inputs/day1.txt');
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$up_floors = substr_count($instructions, "(");
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$down_floors = substr_count($instructions, ")");
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$total = $up_floors - $down_floors;
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return $total;
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}
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/*
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* Solution 1b
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*
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* Runtime: ~.33ms
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*/
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function day1solution1b() {
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$instructions = file_get_contents('./2015/inputs/day1.txt');
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$chars = str_split($instructions);
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$position = 1;
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$floor = 0;
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foreach ($chars as $char) {
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match ($char) {
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"(" => $floor++,
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")" => $floor--,
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};
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if ($floor == -1) {
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break;
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}
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else {
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$position++;
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}
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};
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return $position;
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}
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