eryn/advent-of-code
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Move Day 1 to its own crate

Browse source
This commit is contained in:
Eryn Wells 2022-12-15 23:51:46 +00:00
parent 9dfd195bb6
commit 2a932235cc
4 changed files with 28 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

2234
2022/aoc2022/data/day1-input.txt
View file

File diff suppressed because it is too large Load diff

46
2022/aoc2022/src/day1.rs
View file

@ -1,46 +0,0 @@
use std::io::BufRead;
use std::io::Lines;
use std::io::Read;
use std::io::Result;
use crate::file::line_reader_for_file;
fn get_calorie_totals<R: Read + BufRead>(lines: Lines<R>) -> Result<Vec<u32>> {
let mut elves: Vec<u32> = Vec::new();
let mut current_calorie_count: u32 = 0;
for line in lines {
let line = line?;
if line.is_empty() {
elves.push(current_calorie_count);
current_calorie_count = 0;
continue;
}
let u32_value = u32::from_str_radix(&line, 10)
.expect(format!("Couldn't read u32 value from string: {}", line).as_str());
current_calorie_count += u32_value;
}
elves.sort_unstable_by(|a, b| b.cmp(a));
Ok(elves)
}
pub fn main(input_filename: &str) -> Result<()> {
let line_reader = line_reader_for_file(input_filename)
.expect(format!("Unable to create line reader for file: {}", input_filename).as_str());
let elves = get_calorie_totals(line_reader).expect("Unable to get knapsack calorie totals");
println!(
"Part 1: Elf with highest calorie count in knapsack: {}",
elves[0]
);
let sum_of_top_three = &elves[0] + &elves[1] + &elves[2];
println!(
"Part 2: Elves with top 3 highest calorie counts in their knapsacks: {}, {}, {} = {}",
&elves[0], &elves[1], &elves[2], sum_of_top_three
);
Ok(())
}