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Day 8 solution
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Russell Champoux committed
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[root]
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name = "day08"
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version = "0.1.0"
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dependencies = [
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"regex 0.1.80 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "aho-corasick"
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version = "0.5.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"memchr 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "kernel32-sys"
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version = "0.2.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
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"winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "libc"
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version = "0.2.18"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "memchr"
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version = "0.1.11"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "regex"
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version = "0.1.80"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"aho-corasick 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
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"memchr 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
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"regex-syntax 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
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"thread_local 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
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"utf8-ranges 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "regex-syntax"
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version = "0.3.9"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "thread-id"
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version = "2.0.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "thread_local"
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version = "0.2.7"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"thread-id 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "utf8-ranges"
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version = "0.1.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "winapi"
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version = "0.2.8"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "winapi-build"
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version = "0.1.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[metadata]
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"checksum aho-corasick 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ca972c2ea5f742bfce5687b9aef75506a764f61d37f8f649047846a9686ddb66"
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"checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
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"checksum libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)" = "a51822fc847e7a8101514d1d44e354ba2ffa7d4c194dcab48870740e327cac70"
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"checksum memchr 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)" = "d8b629fb514376c675b98c1421e80b151d3817ac42d7c667717d282761418d20"
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"checksum regex 0.1.80 (registry+https://github.com/rust-lang/crates.io-index)" = "4fd4ace6a8cf7860714a2c2280d6c1f7e6a413486c13298bbc86fd3da019402f"
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"checksum regex-syntax 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)" = "f9ec002c35e86791825ed294b50008eea9ddfc8def4420124fbc6b08db834957"
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"checksum thread-id 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a9539db560102d1cef46b8b78ce737ff0bb64e7e18d35b2a5688f7d097d0ff03"
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"checksum thread_local 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)" = "8576dbbfcaef9641452d5cf0df9b0e7eeab7694956dd33bb61515fb8f18cfdd5"
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"checksum utf8-ranges 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a1ca13c08c41c9c3e04224ed9ff80461d97e121589ff27c753a16cb10830ae0f"
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"checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
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"checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
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@@ -0,0 +1,7 @@
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[package]
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name = "day08"
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version = "0.1.0"
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authors = ["~krowbar"]
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[dependencies]
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regex = "0.1"
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@@ -0,0 +1,92 @@
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extern crate regex;
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use regex::Regex;
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use regex::RegexSet;
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use std::io::Read;
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use std::fs::File;
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const GRID_WIDTH: usize = 50;
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const GRID_HEIGHT: usize = 6;
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fn part_1_2(input: &String) {
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let mut grid = [[false; GRID_WIDTH]; GRID_HEIGHT]; //grid of bools, 50 across by 6 down
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let set = RegexSet::new(&[
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r"rect (\d+)x(\d+)",
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r"rotate row y=(\d+) by (\d+)",
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r"rotate column x=(\d+) by (\d+)",
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]).unwrap();
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let re_rect = Regex::new(r"rect (\d+)x(\d+)").unwrap();
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let re_rot_r = Regex::new(r"rotate row y=(\d+) by (\d+)").unwrap();
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let re_rot_c = Regex::new(r"rotate column x=(\d+) by (\d+)").unwrap();
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for line in input.lines() {
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let match_set: Vec<_> = set.matches(line.trim()).into_iter().collect();
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match match_set[0] {
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0 /*rect*/ => {
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let cap = re_rect.captures(line).unwrap();
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let width = cap.at(1).unwrap().parse().unwrap();
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let height = cap.at(2).unwrap().parse().unwrap();
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//println!("rect ({}, {})", width, height);
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for row in 0..height {
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for col in 0..width {
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grid[row][col] = true;
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}
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}
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},
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1 /*rotate row*/ => {
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let cap = re_rot_r.captures(line).unwrap();
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let y: usize = cap.at(1).unwrap().parse().unwrap();
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let by: usize = cap.at(2).unwrap().parse().unwrap();
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//println!("row ({} by {})", y, by);
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//copy all the values off from this row, then we'll shift the values
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let mut from = [false; GRID_WIDTH];
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for col in 0..GRID_WIDTH {
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from[col] = grid[y][col];
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grid[y][col] = false;
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}
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for col in 0..GRID_WIDTH {
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let new_col: usize = (col + by) % GRID_WIDTH;
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grid[y][new_col] = from[col];
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}
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},
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2 /*rotate column*/=> {
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let cap = re_rot_c.captures(line).unwrap();
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let x: usize = cap.at(1).unwrap().parse().unwrap();
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let by: usize = cap.at(2).unwrap().parse().unwrap();
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//println!("col ({} by {})", x, by);
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//copy all the values off from this column, then we'll shift the values
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let mut from = [false; GRID_HEIGHT];
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for row in 0..GRID_HEIGHT {
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from[row] = grid[row][x];
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grid[row][x] = false;
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}
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for row in 0..GRID_HEIGHT {
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let new_row: usize = (row + by) % GRID_HEIGHT;
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grid[new_row][x] = from[row];
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}
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},
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_ /*no match*/=> {}, //what happened?
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}
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}
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let mut sum = 0;
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for row in 0..GRID_HEIGHT {
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for col in 0..GRID_WIDTH {
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match grid[row][col] {
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true => { print!("#"); sum = sum + 1; },
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false => print!("."),
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}
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}
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println!("");
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}
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println!("Total pixels: {}", sum);
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}
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fn main() {
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let mut file = File::open("./data").expect("could not open file");
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let mut input = String::new();
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file.read_to_string(&mut input).expect("could not read file");
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part_1_2(&input);
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}
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