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author | June McEnroe <programble@gmail.com> | 2017-12-05 00:17:39 -0500 |
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committer | June McEnroe <programble@gmail.com> | 2017-12-05 00:17:39 -0500 |
commit | 625eaa034aacfb3209fb97efb3ecf664c1827e3a (patch) | |
tree | ba29b42f90a8b0ac3185c0b74561a23ad7a68193 /2017/src | |
parent | Day 4, part 2 (diff) | |
download | aoc-625eaa034aacfb3209fb97efb3ecf664c1827e3a.tar.gz aoc-625eaa034aacfb3209fb97efb3ecf664c1827e3a.zip |
Day 5
Diffstat (limited to '2017/src')
-rw-r--r-- | 2017/src/bin/day05.rs | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/2017/src/bin/day05.rs b/2017/src/bin/day05.rs new file mode 100644 index 0000000..b8e21d9 --- /dev/null +++ b/2017/src/bin/day05.rs @@ -0,0 +1,31 @@ +use std::io::{self, Read}; + +fn solve1(input: &str) -> u32 { + let mut jumps: Vec<isize> = 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; + *jump += 1; + } + unreachable!() +} + +fn main() { + let mut input = String::new(); + io::stdin().read_to_string(&mut input).unwrap(); + + println!("Part 1: {}", solve1(&input)); +} + +#[test] +fn part1() { + assert_eq!(5, solve1("0\n3\n0\n1\n-3\n")); +} |