From 5aa7df1d78d7141c46b8d72f5788e36e330d837d Mon Sep 17 00:00:00 2001 From: June McEnroe Date: Tue, 5 Dec 2017 00:22:25 -0500 Subject: Day 5, part 2 --- 2017/src/bin/day05.rs | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) (limited to '2017/src') diff --git a/2017/src/bin/day05.rs b/2017/src/bin/day05.rs index b8e21d9..e96138e 100644 --- a/2017/src/bin/day05.rs +++ b/2017/src/bin/day05.rs @@ -18,14 +18,42 @@ fn solve1(input: &str) -> u32 { unreachable!() } +fn solve2(input: &str) -> u32 { + let mut jumps: Vec = input.lines() + .map(str::parse) + .map(Result::unwrap) + .collect(); + + let mut index = 0isize; + for step in 0.. { + if index < 0 || index >= jumps.len() as isize { + return step; + } + let jump = &mut jumps[index as usize]; + index += *jump; + if *jump >= 3 { + *jump -= 1; + } else { + *jump += 1; + } + } + unreachable!() +} + fn main() { let mut input = String::new(); io::stdin().read_to_string(&mut input).unwrap(); println!("Part 1: {}", solve1(&input)); + println!("Part 2: {}", solve2(&input)); } #[test] fn part1() { assert_eq!(5, solve1("0\n3\n0\n1\n-3\n")); } + +#[test] +fn part2() { + assert_eq!(10, solve2("0\n3\n0\n1\n-3\n")); +} -- cgit 1.4.1 d9cdd7148e13f7169&follow=1'>commit diff
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2022-03-06Publish "Voices"June McEnroe
Is this a post? I guess it is now.
2022-02-22Remove cgit from TOURJune McEnroe
2022-02-14Remove cgitJune McEnroe
My fork of cgit is now <https://git.causal.agency/cgit-pink/>.
2022-02-14Narrow filterJune McEnroe
2022-02-10Correct diminishing shine, I thinkJune McEnroe