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use std::env;
use std::io::BufReader;
use std::io::BufRead;
use std::fs::File;
use std::process;
#[macro_use] extern crate text_io;
struct Claim {
_id: u32,
x: u32,
y: u32,
width: u32,
height: u32
}
fn main() {
let args: Vec<String> = env::args().collect();
if args.len() != 2 {
println!("Wrong number of arguments. Provide just a file name.");
process::exit(1);
}
let filename = &args[1];
println!("Using file {} as input.", filename);
let f = match File::open(filename) {
Ok(file) => file,
Err(e) => {
println!("Failed to open file {}. {:?}", filename, e);
process::exit(1);
}
};
let file = BufReader::new(&f);
let mut claims: Vec<Claim> = Vec::new();
let mut max_width = 0;
let mut max_height = 0;
// exercise 1
for line in file.lines() {
let l = line.unwrap();
let (id, x, y, width, height): (u32, u32, u32, u32, u32);
scan!(l.bytes() => "#{} @ {},{}: {}x{}", id, x, y, width, height);
if x + width > max_width {
max_width = x + width;
}
if y + height > max_height {
max_height = y + height;
}
let claim = Claim { _id: id, x, y, width, height };
claims.push(claim);
}
let (w, h) = (max_width as usize, max_height as usize);
let mut grid: Vec<Vec<u32>> = vec![vec![0; w]; h];
for claim in &claims {
for j in claim.y..(claim.y + claim.height) {
for i in claim.x..(claim.x + claim.width) {
let (x, y) = (i as usize, j as usize);
grid[y][x] += 1;
}
}
}
let mut result = 0;
for j in 0..max_height as usize {
for i in 0..max_width as usize {
if grid[j][i] >= 2 {
result += 1;
}
}
}
println!("Result: {}", result);
// exercise 2
'claims: for claim in &claims {
for j in claim.y..(claim.y + claim.height) {
for i in claim.x..(claim.x + claim.width) {
let (x, y) = (i as usize, j as usize);
if grid[y][x] > 1 {
continue 'claims;
}
}
}
println!("Disjoint claim: {}", claim._id);
}
}
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