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solved day 1 2015

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This commit is contained in:
Dan Chadwick 2024-11-23 23:22:26 -05:00
parent d8f64cc14b
commit f813f39f8a
2 changed files with 24 additions and 28 deletions
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42
2015/day1.php → 2015/days/day1.php
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@ -7,7 +7,7 @@
* *
* Runtime: ~0.158ms * Runtime: ~0.158ms
*/ */
function solution1() { function day1solution1() {
$start_time = microtime(true); $start_time = microtime(true);
$instructions = file_get_contents('./inputs/day1.txt'); $instructions = file_get_contents('./inputs/day1.txt');
$up_floors = substr_count($instructions, "("); $up_floors = substr_count($instructions, "(");
@ -18,46 +18,32 @@ function solution1() {
$execution_time = ($end_time - $start_time); $execution_time = ($end_time - $start_time);
echo $execution_time * 1000 . "\n"; echo $execution_time * 1000 . "\n";
} }
solution1();
/* /*
* Solution 2 * Solution 1b
* *
* Runtime: ~0.622ms * Runtime: ~.33ms
*/ */
function solution2() { function day1solution1b() {
$start_time = microtime(true); $start_time = microtime(true);
$instructions = file_get_contents('./inputs/day1.txt'); $instructions = file_get_contents('./2015/inputs/day1.txt');
$chars = str_split($instructions); $chars = str_split($instructions);
$position = 1;
$floor = 0; $floor = 0;
foreach ($chars as $char) { foreach ($chars as $char) {
match ($char) { match ($char) {
"(" => $floor++, "(" => $floor++,
")" => $floor--, ")" => $floor--,
default => 0,
}; };
} if ($floor == -1) {
echo "The answer is $floor\n"; break;
}
else {
$position++;
}
};
echo "The position is $position\n";
$end_time = microtime(true); $end_time = microtime(true);
$execution_time = ($end_time - $start_time); $execution_time = ($end_time - $start_time);
echo $execution_time * 1000 . "\n"; echo $execution_time * 1000 . "\n";
} }
solution2();
/*
* Solution 3
*
* Runtime: ~0
*/
function solution3() {
$start_time = microtime(true);
$instructions = file_get_contents('./inputs/day1.txt');
$chars = str_split($instructions);
$values = array_count_values($chars);
$floor = $values['('] - $values[')'];
echo "The answer is $floor\n";
$end_time = microtime(true);
$execution_time = ($end_time - $start_time);
echo $execution_time * 1000 . "\n";
}
solution3();

10
2015/solutions.php Normal file
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@ -0,0 +1,10 @@
<?php
$days = glob('./days/*.php');
foreach ($days as $day) {
require($day);
}
$day1 = day1solution1();
$day1b = day1solution1b();