From 36ee2e7a14c7b612e750ae3d841ac34105235bf0 Mon Sep 17 00:00:00 2001 From: Max Bradbury Date: Sun, 4 Dec 2022 20:54:38 +0000 Subject: [PATCH] complete day 3 --- input/day_3.txt | 300 ++++++++++++++++++++++++++++++++++++++++++++++++ src/day_3.rs | 33 ++++++ src/main.rs | 2 + 3 files changed, 335 insertions(+) create mode 100644 input/day_3.txt create mode 100644 src/day_3.rs diff --git a/input/day_3.txt b/input/day_3.txt new file mode 100644 index 0000000..1524f4b --- /dev/null +++ b/input/day_3.txt @@ -0,0 +1,300 @@ +ZTmtZvZLTFNLMQMNRvZncdcHwcScJvcdHnVfwV +zqjqrzqjCqrjtqWhqChqrznhcfdfVnVSVgcffcgJcSgd +rtDGpzjjqjlrGsWqBWFRsbTPFQMTbRNRFmbs +FFlnlnVlmQqcBVhBRrSrGSwVdRJbztSt +NPPNsffWfNztRZSJNG +WpgpTTHDpgTDDpMLPGgMHslmBmmHcBQnFmcqhmnjlqQm +VlVNLlPQhtnDRPnP +QgqTffzZqgvgzWmqqZmGcDthtRFvnnFnhJtJJDDt +WGTBzSqBQTQmZBWHswpNbswLbSNCNl +PFzFQDdLjMzzQDhnDNmwZmqwRsmRRmMVNM +GtSbbtlttvvtBvtHBmqqNqVVwsVgCmRw +brlvctHfrlrqvGvcTpjDdFnLDhdfjLhQpn +fTqzgFrcmzTrTNgMzFzTrgtbMtVMVPSLVbvSStRttPVV 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backpacks = input.lines(); + + for backpack in backpacks { + // todo this should be .chars() or something + let items: Vec<&str> = backpack.split("").collect(); + let items_per_compartment = items.len() / 2; + let first_compartment = &items[1..items_per_compartment]; + let second_compartment= &items[items_per_compartment..(items.len() - 1)]; + + for item in first_compartment { + if second_compartment.contains(item) { + let mut byte = item.as_bytes()[0] as u64; + + // this is kind of diabolical + if item.to_string() == item.to_uppercase() { + // reduce by some lesser amount? + byte -= 38; + } else { + byte -= 96; + } + + priorities_sum += byte; + + break; + } + } + } + + priorities_sum +} diff --git a/src/main.rs b/src/main.rs index dff206f..6fee6b2 100644 --- a/src/main.rs +++ b/src/main.rs @@ -1,9 +1,11 @@ mod day_1; mod day_2; +mod day_3; fn main() { println!("Day 1, part 1: {}", day_1::part_1(include_str!("../input/day_1.txt"))); println!("Day 1, part 2: {}", day_1::part_2(include_str!("../input/day_1.txt"))); println!("Day 2, part 1: {}", day_2::part_1(include_str!("../input/day_2.txt"))); println!("Day 2, part 2: {}", day_2::part_2(include_str!("../input/day_2.txt"))); + println!("Day 3, part 1: {}", day_3::part_1(include_str!("../input/day_3.txt"))); }