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use regex::Regex;
fn parse(s: &str) -> u32 {
match s {
"zero" => 0,
"one" => 1,
"two" => 2,
"three" => 3,
"four" => 4,
"five" => 5,
"six" => 6,
"seven" => 7,
"eight" => 8,
"nine" => 9,
br => br.parse().unwrap(),
}
}
fn parse_bw(s: &str) -> u32 {
match s {
"orez" => 0,
"eno" => 1,
"owt" => 2,
"eerht" => 3,
"ruof" => 4,
"evif" => 5,
"xis" => 6,
"neves" => 7,
"thgie" => 8,
"enin" => 9,
br => br.parse().unwrap(),
}
}
pub fn main() {
let mut sum: u32 = 0;
let re = Regex::new(r"\d|zero|one|two|three|four|five|six|seven|eight|nine").unwrap();
let re_bw = Regex::new(r"\d|ozer|eno|owt|eerht|ruof|evif|xis|neves|thgie|enin").unwrap();
let txt = std::fs::read_to_string("./input/day1.txt").unwrap();
for line in txt.lines() {
let capt = re.find_iter(line).collect::<Vec<_>>();
let str_bw = String::from_iter(line.chars().rev());
let capt_bw = re_bw.find_iter(&str_bw).collect::<Vec<_>>();
let x =
parse(capt.get(0).unwrap().as_str()) * 10 + parse_bw(capt_bw.get(0).unwrap().as_str());
sum += x;
}
println!("{}", sum)
}
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