31 lines
789 B
Rust
31 lines
789 B
Rust
use std::error::Error;
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use std::fs::File;
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use std::io::{self, BufRead};
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use std::vec::Vec;
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fn main() -> Result<(), Box<dyn Error>> {
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let file = File::open("inputs/day1.txt")?;
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let lines = io::BufReader::new(file).lines().map(|l| l.unwrap());
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let mut calories_per_elf: Vec<u32> =
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lines.map(|l| l.parse::<u32>()).fold(vec![0], |mut v, c| {
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if let Ok(cal) = c {
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*v.last_mut().unwrap() += cal;
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} else {
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v.push(0);
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};
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v
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});
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calories_per_elf.sort();
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calories_per_elf.reverse();
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println!("Answer Part1: {}", calories_per_elf[0]);
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let answer2 = calories_per_elf[0] + calories_per_elf[1] + calories_per_elf[2];
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println!("Answer Part2: {}", answer2);
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Ok(())
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}
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