19 lines
563 B
Rust
19 lines
563 B
Rust
#![feature(is_sorted)]
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use itertools::Itertools;
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pub fn main() {
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let valid_part1 = (172_930..683_082)
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.map(|n| n.to_string().chars().collect::<Vec<_>>())
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.filter(|n| n.is_sorted())
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.filter(|v| v.clone().iter().dedup().count() != v.len());
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println!("Part 1: {}", valid_part1.clone().count());
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let part2 = valid_part1.filter(|vec| {
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vec.iter()
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.group_by(move |n| *n)
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.into_iter()
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.fold(false, |acc, (_, v)| acc || v.count() == 2)
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});
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println!("Part 2: {}", part2.count());
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}
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