Improvement I found afterwards:
- Could have done a reduce on the amount array instead of the lines array since I don't use the line value at all
Ategon
joined 2 years ago
MODERATOR OF
[JavaScript] Swapped over to javascript from rust since I want to also practice some js. Managed to get part 1 in 4 minutes and got top 400 on the global leaderboard. Second part took a bit longer and took me 13 mins since I messed up by originally trying to append to the card array. (eventually swapped to keeping track of amounts in a separate array)
Part 1
// Part 1
// ======
function part1(input) {
const lines = input.split("\n");
let sum = 0;
for (const line of lines) {
const content = line.split(":")[1];
const winningNums = content.split("|")[0].match(/\d+/g);
const myNums = content.split("|")[1].match(/\d+/g);
let cardSum = 0;
for (const num of winningNums) {
if (myNums.includes(num)) {
if (cardSum == 0) {
cardSum = 1;
} else {
cardSum = cardSum * 2;
}
}
}
sum = sum + cardSum;
}
return sum;
}
Part 2
// Part 2
// ======
function part2(input) {
let lines = input.split("\n");
let amount = Array(lines.length).fill(1);
for (const [i, line] of lines.entries()) {
const content = line.split(":")[1];
const winningNums = content.split("|")[0].match(/\d+/g);
const myNums = content.split("|")[1].match(/\d+/g);
let cardSum = 0;
for (const num of winningNums) {
if (myNums.includes(num)) {
cardSum += 1;
}
}
for (let j = 1; j <= cardSum; j++) {
if (i + j >= lines.length) {
break;
}
amount[i + j] += amount[i];
}
}
return lines.reduce((acc, line, i) => {
return acc + amount[i];
}, 0);
}
yeah that was updated a bit ago to let first requests be free. Looks like for some reason this post didnt federate to p.d until recently though
~~Ill check out the code later in the week~~ Edit: exams are taking too much of my time, maybe after exams
had some trolls who made an account there and started spamming nsfl content in a bunch of comment sections
Update: Ada is back and banned them, im refederating
Ive temporarily defederated programming.dev from blahaj until the spam wave is sorted and deleted all the comments so we shouldnt get any more of them
When the accounts are dealt with im refederating
Im going to temporarily defederate for now until they get the spam bot problem under control but once the admin comes online and gets everything sorted im refererating
Lemmy doesn't handle certain characters well currently such as left angle brackets and ampersands due to some sanitization in the back end to stop scripting attacks
[Rust] Harder one today, for part 1 I ended up getting stuck for a bit since I wasnt taking numbers at the end of lines into account and in part 2 I defined my gears vector in the wrong spot and spent a bit debugging that
Code
(lemmy removes some chars, all chars are in code link)
use std::fs;
fn part1(input: String) -> u32 {
let lines = input.lines().collect::>();
let mut sum = 0;
for i in 0..lines.len() {
let mut num = 0;
let mut valid = false;
let chars = lines[i].chars().collect::>();
for j in 0..chars.len() {
let character = chars[j];
let parts = ['*', '#', '+', '$', '/', '%', '=', '-', '&', '@'];
if character.is_digit(10) {
num = num * 10 + character.to_digit(10).unwrap();
if i > 0 {
if parts.contains(&lines[i - 1].chars().collect::>()[j]) {
valid = true;
}
if j > 0 {
if parts.contains(&lines[i - 1].chars().collect::>()[j - 1]) {
valid = true;
}
}
if j < chars.len() - 1 {
if parts.contains(&lines[i - 1].chars().collect::>()[j + 1]) {
valid = true;
}
}
}
if i < lines.len() - 1 {
if parts.contains(&lines[i + 1].chars().collect::>()[j]) {
valid = true;
}
if j > 0 {
if parts.contains(&lines[i + 1].chars().collect::>()[j - 1]) {
valid = true;
}
}
if j < chars.len() - 1 {
if parts.contains(&lines[i + 1].chars().collect::>()[j + 1]) {
valid = true;
}
}
}
if j > 0 {
if parts.contains(&lines[i].chars().collect::>()[j - 1]) {
valid = true;
}
}
if j < chars.len() - 1 {
if parts.contains(&lines[i].chars().collect::>()[j + 1]) {
valid = true;
}
}
}
else {
if valid == true {
sum += num;
}
num = 0;
valid = false;
}
if j == chars.len() - 1 {
if valid == true {
sum += num;
}
num = 0;
valid = false;
}
}
}
return sum;
}
fn part2(input: String) -> u32 {
let lines = input.lines().collect::>();
let mut gears: Vec<(usize, usize, u32)> = Vec::new();
let mut sum = 0;
for i in 0..lines.len() {
let mut num = 0;
let chars = lines[i].chars().collect::>();
let mut pos: (usize, usize) = (0, 0);
let mut valid = false;
for j in 0..chars.len() {
let character = chars[j];
let parts = ['*'];
if character.is_digit(10) {
num = num * 10 + character.to_digit(10).unwrap();
if i > 0 {
if parts.contains(&lines[i - 1].chars().collect::>()[j]) {
valid = true;
pos = (i - 1, j);
}
if j > 0 {
if parts.contains(&lines[i - 1].chars().collect::>()[j - 1]) {
valid = true;
pos = (i - 1, j - 1);
}
}
if j < chars.len() - 1 {
if parts.contains(&lines[i - 1].chars().collect::>()[j + 1]) {
valid = true;
pos = (i - 1, j + 1);
}
}
}
if i < lines.len() - 1 {
if parts.contains(&lines[i + 1].chars().collect::>()[j]) {
valid = true;
pos = (i + 1, j);
}
if j > 0 {
if parts.contains(&lines[i + 1].chars().collect::>()[j - 1]) {
valid = true;
pos = (i + 1, j - 1);
}
}
if j < chars.len() - 1 {
if parts.contains(&lines[i + 1].chars().collect::>()[j + 1]) {
valid = true;
pos = (i + 1, j + 1);
}
}
}
if j > 0 {
if parts.contains(&lines[i].chars().collect::>()[j - 1]) {
valid = true;
pos = (i, j - 1);
}
}
if j < chars.len() - 1 {
if parts.contains(&lines[i].chars().collect::>()[j + 1]) {
valid = true;
pos = (i, j + 1);
}
}
}
else {
if valid == true {
let mut current_gear = false;
for gear in &gears {
if gear.0 == pos.0 && gear.1 == pos.1 {
sum += num * gear.2;
current_gear = true;
break;
}
}
if !current_gear {
let tuple_to_push = (pos.0.clone(), pos.1.clone(), num.clone());
gears.push((pos.0.clone(), pos.1.clone(), num.clone()));
}
}
num = 0;
valid = false;
}
if j == chars.len() - 1 {
if valid == true {
let mut current_gear = false;
for gear in &gears {
if gear.0 == pos.0 && gear.1 == pos.1 {
sum += num * gear.2;
current_gear = true;
break;
}
}
if !current_gear {
let tuple_to_push = (pos.0.clone(), pos.1.clone(), num.clone());
gears.push((pos.0.clone(), pos.1.clone(), num.clone()));
}
}
num = 0;
valid = false;
}
}
}
return sum;
}
fn main() {
let input = fs::read_to_string("data/input.txt").unwrap();
println!("{}", part1(input.clone()));
println!("{}", part2(input.clone()));
}
Zoomed out graph including some months before the join wave
Users/month are relatively stable now at 33x users/month compared to pre join wave (users/month is people who have posted or commented)
Rust (Rank 7421/6311) (Time after start 00:32:27/00:35:35)
Extremely easy part 2 today, I would say easier than part 1 but they share the same sort of framework
Code Block
(Note lemmy removed some characters, code link shows them all)
use std::fs;
fn part1(input: String) -> i32 {
const RED: i32 = 12;
const GREEN: i32 = 13;
const BLUE: i32 = 14;
let mut sum = 0;
for line in input.lines() {
let [id, content] = line.split(": ").collect::>()[0..2] else { continue };
let id = id.split(" ").collect::>()[1].parse::().unwrap();
let marbles = content.split("; ").map(|x| { x.split(", ").collect::>() }).collect::>>();
let mut valid = true;
for selection in marbles {
for marble in selection {
let marble_split = marble.split(" ").collect::>();
let marble_amount = marble_split[0].parse::().unwrap();
let marble_color = marble_split[1];
if marble_color == "red" && marble_amount > RED {
valid = false;
break;
}
if marble_color == "green" && marble_amount > GREEN {
valid = false;
break;
}
if marble_color == "blue" && marble_amount > BLUE {
valid = false;
break;
}
}
}
if !valid {
continue;
}
sum += id;
}
return sum;
}
fn part2(input: String) -> i32 {
let mut sum = 0;
for line in input.lines() {
let [id, content] = line.split(": ").collect::>()[0..2] else { continue };
let id = id.split(" ").collect::>()[1].parse::().unwrap();
let marbles = content.split("; ").map(|x| { x.split(", ").collect::>() }).collect::>>();
let mut red = 0;
let mut green = 0;
let mut blue = 0;
for selection in marbles {
for marble in selection {
let marble_split = marble.split(" ").collect::>();
let marble_amount = marble_split[0].parse::().unwrap();
let marble_color = marble_split[1];
if marble_color == "red" && marble_amount > red {
red = marble_amount;
}
if marble_color == "green" && marble_amount > green {
green = marble_amount;
}
if marble_color == "blue" && marble_amount > blue {
blue = marble_amount;
}
}
}
sum += red * green * blue;
}
return sum;
}
fn main() {
let input = fs::read_to_string("data/input.txt").unwrap();
println!("{}", part1(input.clone()));
println!("{}", part2(input.clone()));
}
Hey everyone, the content vote ended and here are the results of what people voted for
Reminder that voting was single transferable vote. If two options were tied the one with a worse average placement in all votes was eliminated
(if someone didnt give a second choice then no other options get their vote)
Crosspost community was eliminated first with no first place votes, then main community (second place votes represented in dark blue), then general community (second place votes represented in light blue)
The overall most voted option was Option 2: People catching community. This means that for the community all content relating to the instance is allowed but people will be directed towards more specific communities relevant to their post in the replies. This should then let people be able to post here with no friction and then get filtered down into the proper communities to help make them more active
As there was significantly less votes than the amount of subscribers in the community I will be running a follow up poll in a week to see if people like how the community is being run or if we need to do another poll to change the instance content again.
Linker Bot
Ive been making a bot for the instance called Linker that posts links to communities in the replies when someone posts a non relative instance link. That feature got implemented into lemmy itself in v18 (it will give autocomplete options when you start typing !insertcommunitynamehere on web) so ill be adapting the bot to fit this community to help with the people catching. The bot api is a bit broken right now so it unfortunately wont be able to work for a bit but until then it would be a huge help if you guys do links to mentioned communities in the comments (it only has to be done once so it doesnt spam the replies)
The format im using for bot messages is something similar to
Hey! Here are some possibly relevant communities in the instance based on what was mentioned
- Link to community 1
- etc for any other communities
I am a bot and this message was created automatically
Feel free to adapt that or make your own
Community Request
Just wanted to do a quick advertisement for the community request community here in the instance at [email protected] . The community is always open to suggest communities to be added to the instance and make sure to upvote ideas there you want added to show the interest in them. Since the discussion community option didnt win if you feel the discussion posts are getting buried by the other content you can suggest a new community for that (or for whatever topic the discussion is about if its general enough)
Mods
If anyone is interested in helping mod the community feel free to reach out to me. Ideally want at least one other person to moderate this community so I can stop moderating and focus on some more admin tasks around the instance including developing some new features for it
Hey everyone! Figured I would do an AMA to kick off some activity in the IAmA community over here. Feel free to throw down some questions below and ill answer them
I'm currently a student in university and have been doing both web development and game development recently (web for internships, game on my own). Out of the four admins ive been the one mainly handling community creation and managing in the instance to make sure everythings running smoothly
Some other misc topics that I can answer about: I compose music & make pixel art, and my favorite games are minecraft, SCP:SL, everhood, battlerite, and metal slug 3
If anyone else wants to do an AMA feel free to start one up in the community (assuming it fits the instance). Any activity helps get the ball rolling for getting it active
Stretch mode scale should do that, its what it was made for. The only things I changed are the two you can see on the right there