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author | June McEnroe <programble@gmail.com> | 2016-12-03 22:43:01 -0500 |
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committer | June McEnroe <programble@gmail.com> | 2016-12-03 22:43:01 -0500 |
commit | 0733b37f5ab9fc8e034bc89b1da7f1a54cb481fd (patch) | |
tree | 67755241279e60162442883c81e13f101385503b /src/bin/day02.rs | |
parent | Day 1 part 2 (diff) | |
download | aoc-0733b37f5ab9fc8e034bc89b1da7f1a54cb481fd.tar.gz aoc-0733b37f5ab9fc8e034bc89b1da7f1a54cb481fd.zip |
Day 2
Diffstat (limited to '')
-rw-r--r-- | src/bin/day02.rs | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/bin/day02.rs b/src/bin/day02.rs new file mode 100644 index 0000000..c5a7f11 --- /dev/null +++ b/src/bin/day02.rs @@ -0,0 +1,71 @@ +use std::io::{self, Read}; + +#[derive(Debug, Clone, Copy)] +enum Keypad { + K1, K2, K3, + K4, K5, K6, + K7, K8, K9, +} + +impl Keypad { + fn up(self) -> Self { + use Keypad::*; + match self { + K4 => K1, K5 => K2, K6 => K3, + K7 => K4, K8 => K5, K9 => K6, + _ => self, + } + } + + fn down(self) -> Self { + use Keypad::*; + match self { + K1 => K4, K2 => K5, K3 => K6, + K4 => K7, K5 => K8, K6 => K9, + _ => self, + } + } + + fn left(self) -> Self { + use Keypad::*; + match self { + K2 => K1, K3 => K2, + K5 => K4, K6 => K5, + K8 => K7, K9 => K8, + _ => self, + } + } + + fn right(self) -> Self { + use Keypad::*; + match self { + K1 => K2, K2 => K3, + K4 => K5, K5 => K6, + K7 => K8, K8 => K9, + _ => self, + } + } +} + +fn main() { + let mut input = String::new(); + io::stdin().read_to_string(&mut input).unwrap(); + + let mut code = Vec::new(); + let mut key = Keypad::K5; + + for line in input.lines() { + for direction in line.chars() { + key = match direction { + 'U' => key.up(), + 'D' => key.down(), + 'L' => key.left(), + 'R' => key.right(), + _ => panic!("{} is not a direction", direction), + } + } + code.push(key); + } + + println!("Part 1: {:?}", code); +} |