This commit is contained in:
BlackDemonFire 2023-12-04 09:59:49 +01:00
parent ac7a1925a5
commit cec5519273
Signed by: lucy
SSH key fingerprint: SHA256:5NG0Um+vQQHuWkYn+Vd84YFm10edFBJiOIpOuHjl8UE
8 changed files with 170 additions and 0 deletions

8
Cargo.lock generated
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@ -25,3 +25,11 @@ version = "0.1.0"
[[package]]
name = "d03t2"
version = "0.1.0"
[[package]]
name = "d04t1"
version = "0.1.0"
[[package]]
name = "d04t2"
version = "0.1.0"

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@ -8,4 +8,6 @@ members = [
"d02t2",
"d03t1",
"d03t2",
"d04t1",
"d04t2",
]

8
d04t1/Cargo.toml Normal file
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@ -0,0 +1,8 @@
[package]
name = "d04t1"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]

6
d04t1/demo_input.txt Normal file
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@ -0,0 +1,6 @@
Card 1: 41 48 83 86 17 | 83 86 6 31 17 9 48 53
Card 2: 13 32 20 16 61 | 61 30 68 82 17 32 24 19
Card 3: 1 21 53 59 44 | 69 82 63 72 16 21 14 1
Card 4: 41 92 73 84 69 | 59 84 76 51 58 5 54 83
Card 5: 87 83 26 28 32 | 88 30 70 12 93 22 82 36
Card 6: 31 18 13 56 72 | 74 77 10 23 35 67 36 11

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d04t1/src/main.rs Normal file
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@ -0,0 +1,46 @@
fn main() {
let input = include_str!("../input.txt");
println!("d04t1: {}", d04t1(input));
}
pub fn d04t1(input: &str) -> usize {
let mut result = 0;
for line in input.lines() {
let (_card_id, card_data) = line.split_once(": ").unwrap();
let (winning_numbers, actual_numbers) = card_data
.split_once(" | ")
.map(|(a, b)| {
(
a.split_whitespace()
.map(|e| e.parse::<usize>().unwrap())
.collect::<Vec<_>>(),
b.split_whitespace()
.map(|e| e.parse::<usize>().unwrap())
.collect::<Vec<_>>(),
)
})
.unwrap();
let mut card_value = 0;
for num in actual_numbers {
if winning_numbers.contains(&num) {
if card_value == 0 {
card_value = 1;
} else {
card_value *= 2;
}
}
}
result += card_value;
}
result
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_d04t1() {
let input = include_str!("../demo_input.txt");
assert_eq!(d04t1(input), 13);
}
}

8
d04t2/Cargo.toml Normal file
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@ -0,0 +1,8 @@
[package]
name = "d04t2"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]

6
d04t2/demo_input.txt Normal file
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@ -0,0 +1,6 @@
Card 1: 41 48 83 86 17 | 83 86 6 31 17 9 48 53
Card 2: 13 32 20 16 61 | 61 30 68 82 17 32 24 19
Card 3: 1 21 53 59 44 | 69 82 63 72 16 21 14 1
Card 4: 41 92 73 84 69 | 59 84 76 51 58 5 54 83
Card 5: 87 83 26 28 32 | 88 30 70 12 93 22 82 36
Card 6: 31 18 13 56 72 | 74 77 10 23 35 67 36 11

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d04t2/src/main.rs Normal file
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@ -0,0 +1,86 @@
fn main() {
let input = include_str!("../input.txt");
println!("d04t2: {}", d04t2(input));
}
struct Card {
card_id: usize,
winning_amount: usize,
}
pub fn d04t2(input: &str) -> usize {
let mut result = 0;
let cards: Vec<Card> = input
.lines()
.map(|line| {
let (card_id, card_data) = line
.split_once(": ")
.map(|(cid, cd)| {
(
cid.split_once(" ")
.unwrap()
.1
.trim()
.parse::<usize>()
.unwrap(),
cd,
)
})
.unwrap();
let (winning_numbers, actual_numbers) = card_data
.split_once(" | ")
.map(|(a, b)| {
(
a.split_whitespace()
.map(|e| e.parse::<usize>().unwrap())
.collect::<Vec<_>>(),
b.split_whitespace()
.map(|e| e.parse::<usize>().unwrap())
.collect::<Vec<_>>(),
)
})
.unwrap();
let winning_amount = actual_numbers
.iter()
.filter(|num| winning_numbers.contains(&num))
.count();
Card {
winning_amount,
card_id,
}
})
.collect();
for card in &cards {
result += 1;
println!(
"Checking card {} - {} winning",
card.card_id, card.winning_amount
);
result += add_rec(card, &cards);
}
result
}
fn add_rec(card: &Card, cards: &Vec<Card>) -> usize {
let mut to_add = 0;
for cid in 1..=card.winning_amount {
let found_card = cards.iter().find(|c| c.card_id == card.card_id + cid);
if let Some(found_card) = found_card {
to_add += 1;
to_add += add_rec(found_card, cards);
} else {
println!("\tdidn't find card {}", card.card_id + cid);
}
}
to_add
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_d04t2() {
let input = include_str!("../demo_input.txt");
assert_eq!(d04t2(input), 30);
}
}