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2018: aoc01

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Antoine Martin 2019-11-14 17:57:25 +01:00
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2018/aoc01/Cargo.toml Normal file
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[package]
name = "aoc01"
version = "0.1.0"
authors = ["Antoine Martin <antoine97.martin@gmail.com>"]
edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]

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2018/aoc01/src/main.rs Normal file
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use std::collections::HashSet;
use std::env;
use std::fs;
type Result<T> = std::result::Result<T, Box<dyn std::error::Error>>;
fn main() -> Result<()> {
let mut args = env::args();
args.next();
let input = fs::read_to_string(
&args
.next()
.expect("Please provide the path to the input file"),
)?;
part1(&input);
part2(&input);
Ok(())
}
fn part1(input: &str) {
let freq = input
.lines()
.map(|line| line.parse::<i32>().unwrap())
.sum::<i32>();
println!("{}", freq);
}
fn part2(input: &str) {
let mut freqs = HashSet::new();
let mut freq = 0;
loop {
for line in input.lines() {
freq += line.parse::<i32>().unwrap();
if freqs.contains(&freq) {
println!("{}", freq);
return;
} else {
freqs.insert(freq);
}
}
}
}

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# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
[[package]]
name = "aoc01"
version = "0.1.0"

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Cargo.toml Normal file
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[workspace]
members = [
"2018/aoc01",
]