66 lines
1.8 KiB
Rust
66 lines
1.8 KiB
Rust
use std::fs;
|
|
use std::char;
|
|
|
|
fn main() {
|
|
let lines = fs::read_to_string("input").expect("Unable to read file");
|
|
|
|
//Part 1
|
|
println!("{}", reduce(lines.clone()));
|
|
|
|
//Part 2
|
|
|
|
let mut all_lengths: Vec<i32> = Vec::new();
|
|
|
|
for i in 0..26 {
|
|
let big_char = char::from_u32(65+i).unwrap();
|
|
let little_char = char::from_u32(97+i).unwrap();
|
|
|
|
let string = lines.clone().replace(big_char, "").replace(little_char, "");
|
|
|
|
all_lengths.push(reduce(string));
|
|
}
|
|
|
|
println!("{}", all_lengths.iter().min().unwrap());
|
|
}
|
|
|
|
fn reduce(string: String) -> i32 {
|
|
let mut current_string = string;
|
|
let mut new_string: Vec<char>;
|
|
let mut last_string = String::new();
|
|
|
|
while last_string != current_string {
|
|
let all_chars: Vec<char> = current_string.chars().into_iter().collect();
|
|
let mut count = 0;
|
|
|
|
new_string = Vec::new();
|
|
|
|
while count < all_chars.len() - 1 {
|
|
let cur_char_uppercase = all_chars[count].to_uppercase().collect::<Vec<char>>()[0];
|
|
let cur_char_lowercase = all_chars[count].to_lowercase().collect::<Vec<char>>()[0];
|
|
|
|
if all_chars[count] == cur_char_lowercase {
|
|
if all_chars[count + 1] == cur_char_uppercase{
|
|
count += 1;
|
|
} else {
|
|
new_string.push(all_chars[count].clone());
|
|
}
|
|
} else {
|
|
if all_chars[count + 1] == cur_char_lowercase{
|
|
count += 1;
|
|
} else {
|
|
new_string.push(all_chars[count].clone());
|
|
}
|
|
}
|
|
|
|
count += 1;
|
|
}
|
|
|
|
new_string.push(all_chars[all_chars.len() - 1].clone());
|
|
|
|
last_string= current_string.clone();
|
|
current_string = new_string.clone().into_iter().collect();
|
|
}
|
|
|
|
return (current_string.len()-1) as i32
|
|
}
|