44 lines
1.5 KiB
Rust
44 lines
1.5 KiB
Rust
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fn main () {
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let data: String = std::fs::read_to_string("input").unwrap();
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let lines = data.lines();
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let new_lines = lines
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.map(|raw_line| replace_numbers(raw_line))
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.fold(String::new(), |a, b| format!("{a}{b}\n"));
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std::fs::write("new_lines", new_lines);
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// let sum: u32 = lines.map(|line| { get_calibration_values(line) }).sum();
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// println!("the sum of all calibration values is {sum}!");
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}
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fn replace_numbers(raw_line: &str) -> String {
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let numbers: [&str; 10] = ["zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"];
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let mut line: String = raw_line.to_string();
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loop {
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let mut clean = false;
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for i in 0..numbers.len() {
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let old_line = line.clone();
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line = line.replace(numbers[i], i.to_string().as_str());
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if line.eq(&old_line) {
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clean = true;
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}
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}
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if clean {
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break;
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}
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}
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line
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}
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fn get_calibration_values(mut line: &str) -> u32 {
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line = replace_numbers(line).clone().as_str();
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let first: u32 = line.chars().find_map(|ch| { ch.to_digit(10) }).unwrap();
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let last: u32 = line.chars().rev().find_map(|ch| { ch.to_digit(10) }).unwrap();
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let result = first * 10 + last;
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println!("{line} ({result})");
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// first * 10 + last
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result
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}
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