Table of content

What is this
77th Challenge
- Challenge
- Solution

What is this

The rules of the game are explained in my original.

77th Challenge

Challenge

Last years AoC done and I am a bit overwehlmed that its already restarted. But I want to get into some blogging again. Today’s challenge was simple but the verbosity of the code shows I’m a bit rusty.

Solution

        fn main() {
        const INPUT: &str = include_str!("input.txt");

        let input_num = INPUT
            .replace("one", "on1e")
            .replace("two", "t2o")
            .replace("three", "t3e")
            .replace("four", "f4r")
            .replace("five", "f5e")
            .replace("six", "s6x")
            .replace("seven", "s7n")
            .replace("eight", "e8t")
            .replace("nine", "n9e");

            
        let out = input_num.lines().fold(0, |acc, x| {
            let a = x
                .chars()
                .find(|&c| c > '0' && c <= '9')
                .unwrap()
                .to_digit(10)
                .unwrap() as i32;
            let b = x
                .chars()
                .rfind(|&c| c > '0' && c <= '9')
                .unwrap()
                .to_digit(10)
                .unwrap() as i32;
            acc + a * 10 + b
        });
        println!("{}", out);
        }