45 lines
1.2 KiB
Rust
45 lines
1.2 KiB
Rust
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fn main() {
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let part2 = true;
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let english_digit_names = ["zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"];
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let stdin = std::io::stdin();
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let mut sum = 0;
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for line in stdin.lines() {
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let line = line.unwrap();
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let mut first: Option<u32> = None;
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let mut last = 0;
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for i in 0..line.chars().count() {
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let slice = &line[i..];
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let first_char = slice.chars().next().unwrap();
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if first_char.is_digit(10) {
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if first == None {
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first = first_char.to_digit(10);
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}
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last = first_char.to_digit(10).unwrap();
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}
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if part2 {
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for (i, name) in english_digit_names.iter().enumerate() {
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if slice.starts_with(name) {
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if first == None {
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first = Some(i.try_into().unwrap());
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}
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last = i.try_into().unwrap();
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}
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}
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}
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}
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sum += first.unwrap() * 10;
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sum += last;
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}
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println!("{}", sum);
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}
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