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pub fn get_sums(input: &str) -> Vec<i32> {
let groups: Vec<&str> = input.split("\n\n").collect::<Vec<&str>>();
let data_groups = groups
.into_iter()
.map(|x| {
let numbers: i32 = x
.split('\n')
.map(|x| x.parse::<i32>().unwrap_or_default())
.sum();
return numbers;
})
.collect::<Vec<i32>>();
data_groups
}
pub fn part1(input: &str) -> i32 {
let sums = get_sums(input);
sums.into_iter().max().unwrap()
}
pub fn part2(input: &str) -> i32 {
let mut sums = get_sums(input);
sums.sort();
sums.reverse();
sums[0] + sums[1] + sums[2]
}
#[cfg(test)]
mod day1_tests {
use super::*;
#[test]
fn test_example() {
let data = include_str!("../example.txt");
let result = part1(data);
assert_eq!(result, 24000);
}
#[test]
fn test_input() {
let data = include_str!("../input.txt");
let result = part1(data);
assert_eq!(result, 69912);
}
#[test]
fn test_example_part2() {
let data = include_str!("../example.txt");
let result = part2(data);
assert_eq!(result, 45000);
}
#[test]
fn test_input_part2() {
let data = include_str!("../input.txt");
let result = part2(data);
assert_eq!(result, 208180);
}
}
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