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extern crate advent_of_code_2018;
use advent_of_code_2018::*;
use std::error::Error;
use std::path::PathBuf;
extern crate im_rc;
use im_rc::HashMap;
// cargo watch -cs "cargo run --release --bin day_2"
fn main() -> Result<(), Box<Error>> {
let input = read_file(&PathBuf::from("inputs/2.txt"))?;
println!("Input: {:?}", input);
let (twice, thrice) = input.iter().fold((0,0), |(twice, thrice), next| {
let occurances = next.chars().fold(HashMap::new(), |occurances, c| {
let counter = occurances.get(&c).cloned().unwrap_or(0);
occurances.update(c, counter + 1)
});
let has_twice = occurances.values().any(|count| *count == 2);
let has_thrice = occurances.values().any(|count| *count == 3);
(
twice + if has_twice { 1 } else { 0 },
thrice + if has_thrice { 1 } else { 0 },
)
});
println!("Twice: {}", twice);
println!("Thrice: {}", thrice);
let checksum = twice * thrice;
println!("Checksum: {}", checksum);
for i in &input {
for j in &input {
let diff = i.chars().zip(j.chars()).fold(0, |diff, (x, y)| {
if x != y {
diff + 1
} else {
diff
}
});
if diff == 1 {
println!("Diff of 1: {} + {}", i, j);
}
}
}
Ok(())
}
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