advent_of_code/year2015/
day01.rs

1use crate::input::Input;
2
3pub fn solve(input: &Input) -> Result<i32, String> {
4    let mut floor = 0;
5    for (idx, c) in input.text.chars().enumerate() {
6        floor += match c {
7            '(' => 1,
8            ')' => -1,
9            _ => {
10                return Err(format!("Invalid char at offset {idx}: '{c}'"));
11            }
12        };
13        if input.is_part_two() && floor == -1 {
14            return Ok(idx as i32 + 1);
15        }
16    }
17    Ok(floor)
18}
19
20#[test]
21pub fn tests() {
22    let real_input = include_str!("day01_input.txt");
23    test_part_one!(real_input => 280);
24    test_part_two!(real_input => 1797);
25}

advent_of_code/year2015/day01.rs

advent_of_code/year2015/
day01.rs