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2022 rust day 3

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This commit is contained in:
Maciej Jur 2022-12-03 12:25:46 +01:00
parent 62b15dfd86
commit f581d92a97
1 changed files with 13 additions and 12 deletions
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25
2022/rust/src/solutions/day03.rs
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@ -25,18 +25,7 @@ fn solve2(data: &Vec<(HashSet<char>, HashSet<char>)>) -> i32 {
.collect::<Vec<HashSet<_>>>()
.chunks_exact(3)
.map(|chunks| {
let char = {
let mut iter = chunks.iter().cloned();
iter.next()
.map(|set| {
iter.fold(set, |set1, set2| {
set1.intersection(&set2).cloned().collect()
})
})
.map(|x| *x.iter().next().unwrap())
.unwrap()
};
convert_char(char)
convert_char(find_intersection(chunks))
})
.sum()
}
@ -46,6 +35,18 @@ fn convert_char(char: char) -> i32 {
char - if char < 97 { 38 } else { 96 }
}
fn find_intersection(sets: &[HashSet<char>]) -> char {
let mut iter = sets.iter().cloned();
iter.next()
.map(|set| {
iter.fold(set, |set1, set2| {
set1.intersection(&set2).cloned().collect()
})
})
.map(|x| *x.iter().next().unwrap())
.unwrap()
}
fn parse_data(data: Vec<String>) -> Vec<(HashSet<char>, HashSet<char>)> {
data.iter()
.map(|str| {