diff --git a/2016/day09/Cargo.lock b/2016/day09/Cargo.lock new file mode 100644 index 0000000..302f385 --- /dev/null +++ b/2016/day09/Cargo.lock @@ -0,0 +1,98 @@ +[root] +name = "day09" +version = "0.1.0" +dependencies = [ + "regex 0.1.80 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "aho-corasick" +version = "0.5.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "memchr 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "kernel32-sys" +version = "0.2.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)", + "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "libc" +version = "0.2.18" +source = "registry+https://github.com/rust-lang/crates.io-index" + +[[package]] +name = "memchr" +version = "0.1.11" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "regex" +version = "0.1.80" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "aho-corasick 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)", + "memchr 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)", + "regex-syntax 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)", + "thread_local 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)", + "utf8-ranges 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "regex-syntax" +version = "0.3.9" +source = "registry+https://github.com/rust-lang/crates.io-index" + +[[package]] +name = "thread-id" +version = "2.0.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)", + "libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "thread_local" +version = "0.2.7" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "thread-id 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "utf8-ranges" +version = "0.1.3" +source = "registry+https://github.com/rust-lang/crates.io-index" + +[[package]] +name = "winapi" +version = "0.2.8" +source = "registry+https://github.com/rust-lang/crates.io-index" + +[[package]] +name = "winapi-build" +version = "0.1.1" +source = "registry+https://github.com/rust-lang/crates.io-index" + +[metadata] +"checksum aho-corasick 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ca972c2ea5f742bfce5687b9aef75506a764f61d37f8f649047846a9686ddb66" +"checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d" +"checksum libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)" = "a51822fc847e7a8101514d1d44e354ba2ffa7d4c194dcab48870740e327cac70" +"checksum memchr 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)" = "d8b629fb514376c675b98c1421e80b151d3817ac42d7c667717d282761418d20" +"checksum regex 0.1.80 (registry+https://github.com/rust-lang/crates.io-index)" = "4fd4ace6a8cf7860714a2c2280d6c1f7e6a413486c13298bbc86fd3da019402f" +"checksum regex-syntax 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)" = "f9ec002c35e86791825ed294b50008eea9ddfc8def4420124fbc6b08db834957" +"checksum thread-id 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a9539db560102d1cef46b8b78ce737ff0bb64e7e18d35b2a5688f7d097d0ff03" +"checksum thread_local 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)" = "8576dbbfcaef9641452d5cf0df9b0e7eeab7694956dd33bb61515fb8f18cfdd5" +"checksum utf8-ranges 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a1ca13c08c41c9c3e04224ed9ff80461d97e121589ff27c753a16cb10830ae0f" +"checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a" +"checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc" diff --git a/2016/day09/Cargo.toml b/2016/day09/Cargo.toml new file mode 100644 index 0000000..37efe6d --- /dev/null +++ b/2016/day09/Cargo.toml @@ -0,0 +1,7 @@ +[package] +name = "day09" +version = "0.1.0" +authors = ["Russell Champoux "] + +[dependencies] +regex = "0.1" \ No newline at end of file diff --git a/2016/day09/src/main.rs b/2016/day09/src/main.rs new file mode 100644 index 0000000..3e1f998 --- /dev/null +++ b/2016/day09/src/main.rs @@ -0,0 +1,87 @@ +extern crate regex; + +use regex::Regex; +use std::io::Read; +use std::fs::File; + +fn part_1(input: &String) { + let set: Vec = input.chars().collect(); + let mut idx: usize = 0; + let mut output = String::new(); + let re = Regex::new(r"\((\d+)x(\d+)\)").unwrap(); + //step by single characters + //when you find an open paren, look for the next closing paren and match to a regex like (x,y) + //if it does not match, add contents to output and continue + //if it matches, add the next 'x' characters to the output 'y' times and increase idx by 'x' + //if not an open paren, add to output + while idx < input.len() { + let c = set[idx]; + match c { + '(' => { + let old_idx: usize = idx; //for when we have to colleect the slice + loop { + idx = idx + 1; + match set[idx] { + ')' => break, + _ => {}, + } + } + let cap_slice = &input[old_idx..idx+1]; + let cap = re.captures(cap_slice).unwrap(); + + let char_count: usize = cap.at(1).unwrap().parse().unwrap(); + let times = cap.at(2).unwrap().parse().unwrap(); + + print!("({}x{}) ", char_count, times); + //println!("({}x{}) adding slice from {} to {}", char_count, times, idx, idx+char_count); + for time in 0..times { + output = output + &input[idx+1..idx+char_count+1]; //copy the next char_count characters + } + idx = idx + char_count; //skip over all the chars we added + + }, + _ => { + output.push(c); + //println!("{} input is len {}", idx, input.len()); + }, + } + idx = idx + 1; //increment idx in every case + } + println!("Final size is {}", output.len()); +} + +fn get_count(input: &String) -> usize { + let re_letters = Regex::new(r"^[^\(\)]*$").unwrap(); //I'd prefer to make this static but don't know how + if re_letters.is_match(&input) { //if there are no parens + return input.len(); //return the length + } + let re = Regex::new(r"^([:alpha:]*)\((\d+)x(\d+)\)(.*)$").unwrap(); + match re.captures(input) { + None => println!("Found nothing!"), + Some(cap) => { + let letters = cap.at(1).unwrap().to_string(); + let count: usize = cap.at(2).unwrap().parse().unwrap(); + let times: usize = cap.at(3).unwrap().parse().unwrap(); + let subslice = &cap.at(4).unwrap()[0..count].to_string(); + let therest = &cap.at(4).unwrap()[count..].to_string(); + + //println!("Found: {} - {},{}", cap.at(1).unwrap(), cap.at(2).unwrap(), cap.at(3).unwrap()), + println!("({},{}) - {}x {}", count, times, times, subslice); + return get_count(&letters) + times * get_count(subslice) + get_count(therest); + } + } + 0 +} + +fn part_2(input: &String) { + println!("Part 2: Length is {}", get_count(input)); +} + +fn main() { + let mut file = File::open("./data").expect("could not open file"); + let mut input = String::new(); + file.read_to_string(&mut input).expect("could not read file"); + + //part_1(&input); + part_2(&input); +}