39 lines
988 B
Rust
39 lines
988 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 elves = Vec::<Vec<u32>>::new();
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let mut current_elf = Vec::<u32>::new();
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for line in lines {
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if line != "" {
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let calories = line.parse().unwrap();
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current_elf.push(calories);
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} else {
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elves.push(current_elf);
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current_elf = Vec::<u32>::new();
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}
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}
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let mut calories_per_elf: Vec<u32> = elves
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.iter()
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.map(|e| e.iter().fold(0, |a, b| a + b))
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.collect();
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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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