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44 lines
1.1 KiB
44 lines
1.1 KiB
#![allow(dead_code)]
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use regex::Regex;
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pub fn solve(input: &str) -> i32 {
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input.lines().filter(|&s| is_nice(&s.to_string())).count() as i32
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}
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fn is_nice(string: &str) -> bool {
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has_pair_of_two_letters(string) && has_letter_sandwich(string)
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}
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fn has_three_vowels(string: &str) -> bool {
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let three_vowels = Regex::new(r"[aeiou].*[aeiou].*[aeiou]").unwrap();
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three_vowels.is_match(string)
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}
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fn has_double_letters(string: &str) -> bool {
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string.as_bytes().windows(2).any(|win| win[0] == win[1])
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}
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fn has_no_substrings(string: &str) -> bool {
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!vec!["ab", "cd", "pq", "xy"].iter().any(|&s| string.contains(s))
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}
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fn has_pair_of_two_letters(string: &str) -> bool {
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string.as_bytes().windows(2).any(|win| {
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let s = String::from_utf8(win.to_vec()).unwrap();
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string.split(&s).count() > 2
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})
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}
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fn has_letter_sandwich(string: &str) -> bool {
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string.as_bytes().windows(3).any(|win| win[0] == win[2])
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}
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#[test]
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fn test_nice() {
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assert!(is_nice(&"qjhvhtzxzqqjkmpb".to_string()));
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assert!(is_nice(&"xxyxx ".to_string()));
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assert!(!is_nice(&"uurcxstgmygtbstg ".to_string()));
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assert!(!is_nice(&"ieodomkazucvgmuy ".to_string()));
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}
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