That's what I did for part 1. Part 2 however is a bit more involved than that but could probably still be solved without "advanced" math.
(let [x 0] (
(print x)
(println "")
))
(println "It's dead Jim")do to the first line.
Neat, thanks a lot. I'm definitly going to use that in the future. For this Advent of Code I'm trying to use no additional libraries, though (which is admittedly not much of a challenge since vanilla Python is already so damn powerful).
it is indeed day s 9 but i fear a few things:
$moons = [
new SpaceObject(-1, 0, 2),
new SpaceObject(2, -10, -7),
new SpaceObject(4, -8, 8),
new SpaceObject(3, 5, -1),
];
$simulation = new SpaceSimulation();
$startPoints = [];
$moonAxis = []; // All axis of all moons we'll need to find the steps for
foreach ($moons as $m => $moon) {
$simulation->addSpaceObject($moon);
$startPoints[] = clone $moon->position;
$moonAxis[] = ['x', 'y', 'z'];
}
$steps = [];
$step = 0;
while (++$step) {
$simulation->step();
$stop = true;
foreach ($moonAxis as $m => $axis) {
foreach ($axis as $a => $axel) { // That's probably non-English
$stop = false;
if ($startPoints[$m]->$axel == $moons[$m]->position->$axel && $moons[$m]->velocity->$axel == 0) {
$steps[] = $step;
unset($moonAxis[$m][$a]);
}
}
}
if ($stop) {
break;
}
}
echo 'Steps: ' . lowestCommonMultiple($steps);After seeing you only have three values, I read your biggest spoiler again, and it finally clicked.