advent-of-code/2022
advent-of-code/2022
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day(01): DRY

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Signed-off-by: Matej Focko <mfocko@redhat.com>
This commit is contained in:
Matej Focko 2022-12-01 11:30:32 +01:00
parent 1d5c91536c
commit 3ced2ec0e6
Signed by: mfocko
GPG key ID: 7C47D46246790496
1 changed files with 18 additions and 51 deletions
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69
src/bin/day01.rs
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@ -3,62 +3,29 @@ use aoc_2022::file_to_lines;
use tracing::*;
use tracing_subscriber::EnvFilter;
use std::cmp::max;
struct Accum {
max_sum: i32,
current_sum: i32,
}
impl Accum {
fn new() -> Accum {
Accum {
max_sum: 0,
current_sum: 0,
}
}
}
fn part_1(input: &[i32]) -> i32 {
input
.iter()
.fold(Accum::new(), |a, &x| {
if x == -1 {
Accum {
max_sum: max(a.max_sum, a.current_sum),
current_sum: 0,
}
} else {
Accum {
max_sum: a.max_sum,
current_sum: a.current_sum + x,
}
}
})
.max_sum
}
fn part_2(input: &[i32]) -> i32 {
fn n_biggest(n: usize, input: &[i32]) -> i32 {
let mut calories: Vec<i32> = Vec::new();
let last_elf = input
.iter()
.fold(Accum::new(), |a, &x| {
if x == -1 {
calories.push(a.current_sum);
Accum::new()
} else {
Accum {
max_sum: a.max_sum,
current_sum: a.current_sum + x,
}
}
})
.current_sum;
let last_elf = input.iter().fold(0, |a, &x| {
if x == -1 {
calories.push(a);
0
} else {
a + x
}
});
calories.push(last_elf);
calories.sort();
calories.iter().rev().take(3).sum()
calories.iter().rev().take(n).sum()
}
fn part_1(input: &[i32]) -> i32 {
n_biggest(1_usize, input)
}
fn part_2(input: &[i32]) -> i32 {
n_biggest(3_usize, input)
}
fn parse_input(pathname: &str) -> Vec<i32> {