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day 9

This commit is contained in:
Alie 2023-12-09 10:22:39 +01:00
parent c53cbecb7f
commit 343901be38
5 changed files with 280 additions and 1 deletions
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4
Cargo.lock generated
View File

@ -46,6 +46,10 @@ version = "0.1.0"
name = "day08" name = "day08"
version = "0.1.0" version = "0.1.0"
[[package]]
name = "day09"
version = "0.1.0"
[[package]] [[package]]
name = "memchr" name = "memchr"
version = "2.6.4" version = "2.6.4"

2
Cargo.toml
View File

@ -10,7 +10,7 @@ members = [
"day06", "day06",
"day07", "day07",
"day08", "day08",
# "day09", "day09",
# "day10", # "day10",
# "day11", # "day11",
# "day12", # "day12",

8
day09/Cargo.toml Normal file
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@ -0,0 +1,8 @@
[package]
name = "day09"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]

200
day09/input.txt Normal file
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@ -0,0 +1,200 @@
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11 33 69 125 207 321 473 669 915 1217 1581 2013 2519 3105 3777 4541 5403 6369 7445 8637 9951
13 26 51 107 227 475 984 2024 4111 8170 15767 29427 53057 92495 156208 256164 408905 636850 969859 1447091 2119191
10 18 45 115 265 550 1050 1871 3140 5026 7887 12759 22579 44782 96244 211971 459470 961394 1929841 3716619 6884877
9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49
-8 -12 -16 -20 -24 -28 -32 -36 -40 -44 -48 -52 -56 -60 -64 -68 -72 -76 -80 -84 -88
8 4 -3 0 52 227 648 1513 3146 6104 11404 20985 38592 71365 132539 245814 452140 819884 1459607 2544982 4341732
11 21 31 40 57 112 265 626 1411 3070 6534 13641 27820 55153 106059 198248 362834 658985 1211477 2306915 4631860
-3 13 43 87 145 217 303 403 517 645 787 943 1113 1297 1495 1707 1933 2173 2427 2695 2977
7 6 22 76 202 464 997 2093 4366 9061 18642 37934 76343 152077 299879 584606 1124137 2126792 3951214 7201596 12880296
-5 -12 -16 -9 23 117 374 1049 2736 6717 15564 34095 70784 139706 263056 474211 821201 1370314 2209376 3450015 5227933
17 21 25 29 33 37 41 45 49 53 57 61 65 69 73 77 81 85 89 93 97
6 13 32 80 180 368 717 1406 2880 6172 13500 29335 62308 128664 258590 507776 978143 1853856 3461417 6365291 11511885
5 23 49 86 154 303 625 1278 2553 5048 10072 20498 42428 88236 181828 367312 722717 1380949 2560835 4611894 8077398

67
day09/src/main.rs Normal file
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use std::fs;
fn main() {
const FILE_PATH: &str = "input.txt";
println!(
"Welcome to AOC2023 day NUMBER, first we will read the file {}",
FILE_PATH
);
let contents = fs::read_to_string(FILE_PATH).expect("Should have been able to read the file");
println!("And we parse the file!");
let data = parse(&contents);
println!("First thing: {}", calculate_1(&data));
println!("Second thing: {}", calculate_2(&data));
}
fn parse(input: &str) -> Vec<Vec<i32>> {
input
.lines()
.map(|line| {
line
.split_ascii_whitespace()
.map(|n| n.parse().unwrap())
.collect()
})
.collect()
}
fn calculate_next(secuence: &Vec<i32>) -> i32 {
if secuence.iter().all(|n| n == &0) {
return 0;
}
secuence.last().unwrap()
+ calculate_next(
&secuence
.iter()
.zip(secuence.iter().skip(1))
.map(|(p, n)| n - p)
.collect(),
)
}
fn calculate_1(secuences: &Vec<Vec<i32>>) -> i32 {
secuences.iter().map(calculate_next).sum()
}
fn calculate_2(secuences: &Vec<Vec<i32>>) -> i32 {
secuences.iter().map(|sec| calculate_next(&sec.iter().rev().map(|n| *n).collect())).sum()
}
#[cfg(test)]
mod test {
const INPUT: &str = r#"0 3 6 9 12 15
1 3 6 10 15 21
10 13 16 21 30 45"#;
use super::*;
#[test]
fn test1() {
let tst = parse(INPUT);
assert_eq!(calculate_1(&tst), 114);
}
#[test]
fn test2() {
let tst = parse("10 13 16 21 30 45");
assert_eq!(calculate_2(&tst), 5);
}
}