Created
December 4, 2018 05:53
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#![feature(dbg_macro)] | |
#![allow(unused)] | |
mod prelude; | |
use self::prelude::*; | |
#[derive(Debug, Deserialize, PartialOrd, PartialEq, Eq, Ord)] | |
struct TS { | |
year: u32, | |
month: u32, | |
day: u32, | |
hour: u32, | |
minute: u32, | |
} | |
fn main() { | |
let demo = include_str!("../demo.txt"); | |
let input = include_str!("../input.txt"); | |
let mut count = 0; | |
let mut sorted = input.lines().collect::<Vec<_>>(); | |
sorted.sort(); | |
let mut guards = Map::<u32, u32>::new(); | |
let mut precise_time = Map::<u32, Vec<u32>>::new(); | |
let mut sleep_start = 0; | |
let mut current_guard = None; | |
for l in sorted { | |
if let [ts, rest] = l.split("] ").collect::<Vec<_>>().as_slice() { | |
let ts: TS = s!("[{}-{}-{} {}:{}" <- ts).unwrap(); | |
let next: i32 = serde_scan::from_str_skipping("Guard#", rest).unwrap_or(-1); | |
if next > 0 { | |
current_guard = Some(next as u32); | |
} | |
match *rest { | |
"falls asleep" => { | |
sleep_start = ts.minute; | |
}, | |
"wakes up" => { | |
if let Some(guard) = current_guard { | |
*guards.entry(guard).or_insert(0) += ts.minute - sleep_start; | |
let time_vec = precise_time.entry(guard).or_insert(vec![0; 60]); | |
for val in &mut time_vec[(sleep_start as usize)..(ts.minute as usize)] { | |
*val += 1; | |
} | |
sleep_start = 0; | |
} | |
}, | |
_ => {}, | |
} | |
} | |
} | |
let (max, tot) = guards.iter().max_by_key(|&(a, b)| b).unwrap(); | |
let (min, _) = precise_time.get(max).unwrap().iter().enumerate().max_by_key(|&(min, &val)| val).unwrap(); | |
println!("p1: {}", *max * (min as u32)); | |
let guard = precise_time.iter().max_by_key(|&(guard, times)| { | |
let max = times.iter().enumerate().max_by_key(|&(min, &val)| val).unwrap(); | |
max.1 | |
}); | |
if let Some((id, list)) = guard { | |
let max = list.iter().enumerate().max_by_key(|&(min, &val)| val).unwrap(); | |
let p2 = *id * (max.0 as u32); | |
dbg!(p2); | |
} | |
} |
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