Parnic
1da6d83760
I have no idea what I'm doing in Rust, and I definitely don't understand borrowing yet, so this is a hideous solution on multiple fronts. I'm not sure that I'll be sticking with Rust as AoC doesn't feel like a conducive environment to learn it in.
64 lines
1.5 KiB
Rust
64 lines
1.5 KiB
Rust
use std::io::{self, BufRead};
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use std::fs::File;
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use std::path::Path;
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fn main() {
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if let Ok(lines) = read_lines("inputs/01.txt") {
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part1(lines);
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}
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if let Ok(lines) = read_lines("inputs/01.txt") {
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part2(lines);
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}
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}
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fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
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where P: AsRef<Path>, {
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let file = File::open(filename)?;
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Ok(io::BufReader::new(file).lines())
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}
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fn part1(lines: io::Lines<io::BufReader<File>>) {
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let mut last_depth: i64 = 0;
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let mut num_increased = -1;
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for line in lines {
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if let Ok(depth) = line {
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let di: i64 = depth.parse().unwrap();
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if di > last_depth {
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num_increased = num_increased + 1;
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}
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last_depth = di;
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}
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}
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println!("part1: increased: {:?}", num_increased);
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}
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fn part2(lines: io::Lines<io::BufReader<File>>) {
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let mut last_total: i64 = 0;
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let mut num_increased = -1;
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let mut num1;
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let mut num2 = -1;
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let mut num3 = -1;
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for line in lines {
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if let Ok(depth) = line {
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let di: i64 = depth.parse().unwrap();
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num1 = num2;
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num2 = num3;
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num3 = di;
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if num1 < 0 || num2 < 0 || num3 < 0 {
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continue
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}
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let total = num1 + num2 + num3;
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if total > last_total {
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num_increased = num_increased + 1;
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}
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last_total = total;
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}
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}
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println!("part2: increased: {:?}", num_increased);
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}
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