73 lines
2.3 KiB
Rust
73 lines
2.3 KiB
Rust
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use std::fs::File;
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use std::io::{BufRead, BufReader};
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fn get_coords_from_line(line: &String) -> (usize, usize, usize, usize) {
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let first_pieces: Vec<&str> = line.as_str().split(" @ ").collect();
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let _piece_number = first_pieces.get(0).unwrap();
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let piece_dims: Vec<&str> = first_pieces.get(1).unwrap().split(": ").collect();
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let top_left_pieces: Vec<&str> = piece_dims.get(0).unwrap().split(",").collect();
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let top_x = top_left_pieces.get(0).unwrap().parse::<usize>().unwrap();
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let top_y = top_left_pieces.get(1).unwrap().parse::<usize>().unwrap();
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let bottom_right_pieces: Vec<&str> = piece_dims.get(1).unwrap().split("x").collect();
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let bottom_x = top_x + bottom_right_pieces.get(0).unwrap().parse::<usize>().unwrap();
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let bottom_y = top_y + bottom_right_pieces.get(1).unwrap().parse::<usize>().unwrap();
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(top_x, top_y, bottom_x, bottom_y)
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}
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fn build_map(lines: &Vec<String>) -> [[u8; 1000]; 1000] {
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let mut map = [[0u8; 1000]; 1000];
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for line in lines.iter() {
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let (top_x, top_y, bottom_x, bottom_y) = get_coords_from_line(line);
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for i in top_x..bottom_x {
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for j in top_y..bottom_y {
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map[i][j] += 1;
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}
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}
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}
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map
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}
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fn calc_overlap(map: &[[u8; 1000]; 1000]) {
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let mut squares = 0;
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for row in map.iter() {
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for col in row.iter() {
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if *col > 1 {
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squares += 1;
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}
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}
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}
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println!("overlapped squares: {}", squares);
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}
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fn find_non_overlapped(lines: &Vec<String>, map: &[[u8; 1000]; 1000]) {
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for line in lines.iter() {
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let (top_x, top_y, bottom_x, bottom_y) = get_coords_from_line(line);
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let mut all_ones = true;
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for i in top_x..bottom_x {
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for j in top_y..bottom_y {
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if map[i][j] != 1 {
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all_ones = false;
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break;
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}
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}
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if !all_ones {
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break;
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}
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}
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if all_ones {
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println!("non overlapped line: {}", line);
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break;
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}
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}
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}
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fn main() {
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let lines: Vec<String> = BufReader::new(File::open("input").unwrap())
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.lines()
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.map(|line| line.unwrap())
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.collect();
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let map = build_map(&lines);
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calc_overlap(&map);
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find_non_overlapped(&lines, &map);
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}
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