kleph
8f2667bff3
Some checks reported errors
continuous-integration/drone/push Build encountered an error
50 lines
1.6 KiB
Rust
50 lines
1.6 KiB
Rust
use std::fs::File;
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use std::io::{BufRead, BufReader};
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fn main() {
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// let filename = "../2/input_example.txt";
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let filename = "../2/input.txt";
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let file = BufReader::new(File::open(filename).expect("Unable to open file"));
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let mut ranges: Vec<Vec<u8>> = Vec::new();
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let mut bad_id: Vec<u64> = Vec::new();
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for line in file.lines() {
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let wline: String = line.unwrap();
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let sranges: Vec<&str> = wline.split(',').collect();
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for s in sranges {
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let range: Vec<u64> = s.split('-').map(|x| x.parse().unwrap()).collect();
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for id in range[0]..range[1] + 1 {
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let s = id.to_string().into_bytes();
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ranges.push(s);
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}
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}
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}
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println!("number of ranges to inspect {:?}", ranges.len());
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for product_id in ranges {
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for pivot in 1..(product_id.len() / 2) + 1 {
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let mut bad: bool = true;
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let mut complete = 0;
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for cursor in 0..product_id.len() {
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complete = (cursor + 1) % pivot;
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if product_id[cursor % pivot] != product_id[cursor] {
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bad = false;
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break;
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}
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}
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if bad && complete == 0 {
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let num = str::from_utf8(&product_id).unwrap();
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bad_id.push(num.parse().unwrap())
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}
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}
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}
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println!("bad ids {:?}", bad_id.len());
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bad_id.sort();
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bad_id.dedup();
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println!("dedup bad ids {:?}", bad_id.len());
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let sum: u64 = bad_id.iter().sum();
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println!("{}", sum)
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}
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