56 lines
1.2 KiB
Rust
56 lines
1.2 KiB
Rust
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use aoc_runner_derive::{aoc, aoc_generator};
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use itertools::Itertools;
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#[aoc_generator(day1)]
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pub fn parse_measurements(input: &str) -> Vec<usize> {
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input
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.split('\n')
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.map(|input| input.parse().unwrap())
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.collect()
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}
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#[aoc(day1, part1)]
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pub fn count_increases_indexed(input: &[usize]) -> usize {
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let mut count = 0;
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for i in 1..input.len() {
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if input[i - 1] < input[i] {
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count += 1;
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}
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}
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count
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}
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#[aoc(day1, part1, tuple_windows)]
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pub fn count_increases_tuple_windows(input: &[usize]) -> usize {
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let mut count = 0;
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for (a, b) in input.iter().tuple_windows() {
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if a < b {
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count += 1;
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}
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}
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count
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}
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#[aoc(day1, part2)]
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pub fn count_sliding_increases_indexed(input: &[usize]) -> usize {
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let mut count = 0;
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for i in 3..input.len() {
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if input[i - 3] + input[i - 2] + input[i - 1] < input[i - 2] + input[i - 1] + input[i] {
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count += 1;
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}
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}
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count
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}
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#[aoc(day1, part2, tuple_windows)]
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pub fn count_sliding_increases_tuple_windows(input: &[usize]) -> usize {
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let mut count = 0;
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for (a, b, c, d) in input.iter().tuple_windows() {
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if a + b + c < b + c + d {
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count += 1;
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}
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}
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count
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}
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