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#![allow(dead_code)]
#![allow(unused_variables)]
#![allow(unused_mut)]
use regex::Regex;
use std::env;
use std::fs::File;
use std::io::Read;
fn main() {
let args: Vec<String> = env::args().collect();
let filename = if args.len() == 1 {
"in/".to_owned() + args[0].split('/').last().unwrap() + ".pzl"
} else {
args[1].clone()
};
let mut f = File::open(filename).expect("cannot open file");
let mut content = String::new();
f.read_to_string(&mut content).expect("cannot read file");
let lines = content.trim_end().split("\n");
let re = Regex::new(r"mul\((?<a>[0-9]+),(?<b>[0-9]+)\)").unwrap();
let mut res1 = 0;
for line in lines.clone() {
res1 += re
.captures_iter(line)
.map(|caps| {
let p = |name| caps.name(name).unwrap().as_str().parse::<i32>().unwrap();
p("a") * p("b")
})
.fold(0, |a, b| a + b);
}
let re_m = Regex::new(r"^mul\((?<a>[0-9]+),(?<b>[0-9]+)\)").unwrap();
let re_do = Regex::new(r"^do\(\)").unwrap();
let re_dont = Regex::new(r"^don't\(\)").unwrap();
let mut res2 = 0;
let mut valid = true;
for line in lines {
for i in 0..line.len() {
if re_do.is_match(&line[i..]) {
valid = true;
} else if re_dont.is_match(&line[i..]) {
valid = false;
} else if valid && re_m.is_match(&line[i..]) {
let cap = re_m.captures(&line[i..]).unwrap();
let p = |name| cap.name(name).unwrap().as_str().parse::<i32>().unwrap();
res2 += p("a") * p("b");
}
}
}
println!("res1: {}", res1);
println!("res2: {}", res2);
assert_eq!(res1, 162813399);
assert_eq!(res2, 53783319);
}
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