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2018/01

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Anders Olsson
2018-12-01 10:18:42 +01:00
parent 1ed2085a2c
commit f530d51460
4 changed files with 1032 additions and 0 deletions
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2018/01/Cargo.lock generated Normal file
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[[package]]
name = "day-01"
version = "0.1.0"

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2018/01/Cargo.toml Normal file
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[package]
name = "day-01"
version = "0.1.0"
authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
[dependencies]

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2018/01/src/main.rs Normal file
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use std::collections::HashSet;
use std::io::{self, BufRead};
fn main() {
let stdin = io::stdin();
let changes = stdin
.lock()
.lines()
.filter_map(Result::ok)
.map(|line| line.parse::<i32>().expect("failed to parse delta"))
.collect::<Vec<_>>();
println!("part.one={}", changes.iter().sum::<i32>());
let mut seen = HashSet::new();
let mut frequency = 0;
'iterate: loop {
for change in &changes {
frequency += change;
if seen.contains(&frequency) {
break 'iterate;
}
seen.insert(frequency);
}
}
println!("part.two={}", frequency);
}