bwc9876.dev
Advent of Code solutions
Day 3
+23
-5
+1
Cargo.lock
+1
Cargo.lock
+1
years/2024/Cargo.toml
+1
years/2024/Cargo.toml
+19
-5
years/2024/src/day_3.rs
+19
-5
years/2024/src/day_3.rs
···
1
1
2
2
use advent_core::{Day, day_stuff, ex_for_day};
3
+
use regex::RegexBuilder;
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4
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pub struct Day3;
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+
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const RE: &str = r"mul\((\d+),(\d+)\)";
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+
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fn re_do(i: &str) -> u64 {
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let re = RegexBuilder::new(RE).multi_line(true).build().unwrap();
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re.captures_iter(i).map(|c| {
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c.get(1).unwrap().as_str().parse::<u64>().unwrap()
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*
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c.get(2).unwrap().as_str().parse::<u64>().unwrap()
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}).sum::<u64>()
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}
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impl Day for Day3 {
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19
8
-
day_stuff!(3, "", "");
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day_stuff!(3, "161", "48");
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21
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-
fn part_1(_input: Self::Input) -> Option<String> {
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-
None
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fn part_1(input: Self::Input) -> Option<String> {
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Some(re_do(&input).to_string())
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}
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-
fn part_2(_input: Self::Input) -> Option<String> {
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-
None
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fn part_2(input: Self::Input) -> Option<String> {
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Some(input.split("do()").map(|v|
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re_do(v.split("don't()").nth(0).unwrap())
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).sum::<u64>().to_string())
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}
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31
}
+1
years/2024/src/examples/day_3/1.txt
+1
years/2024/src/examples/day_3/1.txt
···
1
+
xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))
+1
years/2024/src/examples/day_3/2.txt
+1
years/2024/src/examples/day_3/2.txt
···
1
+
xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))