add day 3
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ef54a885e2
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// Copyright 2022 Christian Ulrich
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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use std::collections::BTreeSet;
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use std::io;
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#[derive(Debug, PartialOrd, PartialEq, Eq, Ord, Clone)]
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pub struct Item(u8);
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#[derive(Clone)]
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pub struct Rucksack {
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c1: BTreeSet<Item>,
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c2: BTreeSet<Item>,
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}
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pub struct Rucksacks {}
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pub struct Group {
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rucksacks: Vec<Rucksack>,
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}
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impl Item {
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pub fn new(value: char) -> Result<Self, &'static str> {
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match value {
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'A'..='z' => Ok(Item(value as u8)),
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_ => Err("item value out of range"),
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}
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}
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pub fn priority(&self) -> usize {
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match self.0 as char {
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'a'..='z' => (self.0 - 96).into(),
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'A'..='Z' => (self.0 - 38).into(),
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_ => panic!("not reachable"),
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}
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}
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}
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impl Rucksack {
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pub fn new(compartment1: &str, compartment2: &str) -> Result<Self, &'static str> {
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let collection1: Result<BTreeSet<_>, _> = compartment1.chars().map(Item::new).collect();
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let collection2: Result<BTreeSet<_>, _> = compartment2.chars().map(Item::new).collect();
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Ok(Rucksack {
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c1: collection1?,
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c2: collection2?,
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})
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}
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pub fn items(&self) -> BTreeSet<Item> {
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self.c1.union(&self.c2).cloned().collect()
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}
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pub fn duplicates(&self) -> Vec<Item> {
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self.c1.intersection(&self.c2).cloned().collect()
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}
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}
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impl Iterator for Rucksacks {
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type Item = Result<Rucksack, &'static str>;
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fn next(&mut self) -> Option<Self::Item> {
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if let Some(line) = io::stdin().lines().next() {
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let line = line.unwrap();
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if line.len() > 0 {
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if line.len() % 2 == 0 {
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let (c1, c2) = line.split_at(line.len() / 2);
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return Some(Rucksack::new(c1, c2));
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}
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return Some(Err("input file contains invalid line"));
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}
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}
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None
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}
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}
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impl Group {
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pub fn new(rucksacks: &[Rucksack]) -> Self {
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Self {
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rucksacks: rucksacks.into(),
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}
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}
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pub fn badge(&self) -> Result<Item, &'static str> {
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if let Some(first) = self.rucksacks.first() {
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let mut items = first.items();
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for next_items in self.rucksacks[1..].iter().map(Rucksack::items) {
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items = items.intersection(&next_items).cloned().collect();
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}
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if items.len() == 1 {
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return Ok(items.iter().next().cloned().unwrap());
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}
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}
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Err("cannot determine badge")
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}
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}
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@ -0,0 +1,301 @@
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||||
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|
||||
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||||
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|
||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
NlrTblbNNbwRPpjjbPdJ
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||||
GlztrhvfGqltqzWrcZgFZVSWWSTSncnL
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||||
FLJqLFRjzFqzJddlLfNNCjPrGSHCPHNVNVSH
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||||
TWTpngssgcPgNGPc
|
||||
pGMDZpnZBMDsTTTnTsQWWZTRlbvdfZlLflZzJfdqvdRbqf
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||||
ClsJpCgsppMbFFFbHp
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||||
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||||
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||||
LNLSJjQDLlzRGwTTzQfT
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||||
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||||
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bzrpWWzbqrpnZsJwZVpC
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||||
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mmdpgmttDrpgpdmZdHmgNsQVZvJNMQvVJffsZVQf
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||||
pdcBrMgDgcgrrHPcFSFzzqzFFbPS
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qHMDhPBqbqZVzbddTcVwSmNWNVcc
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BFCZbqPbHBPMhCljvQSvGCCpnj
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CWQZGCWfMZGqbTbtpLsbWp
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GwjhPCRZPQPPCPwmzSNzzzmwzlzSgH
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nhjjmshdwmSjsnmwrrQrtbtbgTTgrWth
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BTLBhMMBpSMsMjZz
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hwbBgTsbBbGrGHvGrvDnPH
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nzwgtSFRqhDphDwB
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VdNrlWHpmQzSMgJFdRFz
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||||
mmjhhRBRBcdZrcdRCz
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lvldsNpNGCGgCvCGggDLMbMmrdwnjjZdLLwrjM
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HWHtPHSHPBnrmZjBbwwC
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tHqWRtfttNlDClvNqs
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||||
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spfDNpvsnPCfhBbh
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||||
GhWSgWphprhQqqndQd
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||||
MJSGMghngrccvSrSzMrsQbbRmjmQmjtNtbfB
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CMnvczGChCCwcgtpDDlLLLwVHdlHTZ
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||||
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||||
mGtBRBFmsRpVGMzpnnGL
|
||||
lFNqtdsssrRFBltSFRFlSrvfDSWWvwfhhPJPjWfQzPvf
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||||
ztthMtCmffcChJhChfCJdLddLBBgvqdvBBVBcgdq
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||||
smbsmbmChCJmJffPmhNthDtZwnFQZQGpSrGWGQGZpQZzWP
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||||
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||||
hbbMMTcWhbwnJPlwWrnPbbVGVNndgpVVHmdNHVBmmmtf
|
||||
bCTPTclcgRZQZCgs
|
||||
|
||||
|
|
@ -0,0 +1,34 @@
|
|||
// Copyright 2022 Christian Ulrich
|
||||
//
|
||||
// This program is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU General Public License as published by
|
||||
// the Free Software Foundation, either version 3 of the License, or
|
||||
// (at your option) any later version.
|
||||
//
|
||||
// This program is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU General Public License
|
||||
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
//
|
||||
// usage: ./part1 < input
|
||||
|
||||
pub mod common;
|
||||
|
||||
use common::{Item, Rucksacks};
|
||||
|
||||
fn main() -> Result<(), &'static str> {
|
||||
let rucksacks = Rucksacks {};
|
||||
let mut result = 0;
|
||||
for rucksack in rucksacks {
|
||||
result += rucksack?
|
||||
.duplicates()
|
||||
.iter()
|
||||
.map(Item::priority)
|
||||
.sum::<usize>();
|
||||
}
|
||||
println!("{result}");
|
||||
Ok(())
|
||||
}
|
||||
|
|
@ -0,0 +1,36 @@
|
|||
// Copyright 2022 Christian Ulrich
|
||||
//
|
||||
// This program is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU General Public License as published by
|
||||
// the Free Software Foundation, either version 3 of the License, or
|
||||
// (at your option) any later version.
|
||||
//
|
||||
// This program is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU General Public License
|
||||
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
//
|
||||
// usage: ./part2 < input
|
||||
|
||||
pub mod common;
|
||||
|
||||
use common::{Group, Rucksacks};
|
||||
|
||||
fn main() -> Result<(), &'static str> {
|
||||
let rucksacks = Rucksacks {};
|
||||
let mut result = 0;
|
||||
let mut group_rucksacks = vec![];
|
||||
for rucksack in rucksacks {
|
||||
group_rucksacks.push(rucksack?);
|
||||
if group_rucksacks.len() == 3 {
|
||||
let group = Group::new(&group_rucksacks);
|
||||
result += group.badge()?.priority();
|
||||
group_rucksacks.clear();
|
||||
}
|
||||
}
|
||||
println!("{result}");
|
||||
Ok(())
|
||||
}
|
||||
|
|
@ -0,0 +1,6 @@
|
|||
vJrwpWtwJgWrhcsFMMfFFhFp
|
||||
jqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL
|
||||
PmmdzqPrVvPwwTWBwg
|
||||
wMqvLMZHhHMvwLHjbvcjnnSBnvTQFn
|
||||
ttgJtRGJQctTZtZT
|
||||
CrZsJsPPZsGzwwsLwLmpwMDw
|
||||
Loading…
Reference in New Issue