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#![allow(dead_code)]
#![allow(unused_variables)]
#![allow(unused_mut)]
use std::collections::HashMap;
use std::fs::File;
use std::io::Read;
// use std::cmp::max;
// use std::cmp::min;
fn is_symbol(c: char) -> bool {
if c.is_digit(10) || c == '.' {
false
} else {
true
}
}
fn is_valid(x: usize, y: usize, m: &Vec<Vec<char>>) -> bool {
for dy in -1i32..2 {
for dx in -1i32..2 {
let mut xx: usize;
let mut yy: usize;
if x == 0 && dx == -1 {
xx = x;
} else if x == m[0].len() - 1 && dx == 1 {
xx = x;
} else {
xx = ((x as i32) + dx) as usize;
}
if y == 0 && dy == -1 {
yy = y;
} else if y == m.len() - 1 && dy == 1 {
yy = y;
} else {
yy = ((y as i32) + dy) as usize;
}
// println!("{} {} {} {} {} {}", x, y, dx, dy, xx, yy);
// print!("{}", m[y][x]);
if is_symbol(m[yy][xx]) {
return true;
}
}
}
return false;
}
fn main() {
// let filename = "in/day03.ref";
let filename = "in/day03.pzl";
let mut f = File::open(filename).expect("cannot open file");
let mut content = String::new();
f.read_to_string(&mut content).expect("cannot read file");
let lines: Vec<_> = content.trim_end().split('\n').collect();
// println!("{:?}", lines);
let mut res1 = 0;
let mut res2 = 0;
let mut m: Vec<Vec<char>> = Vec::new();
for line in &lines {
let mut l: Vec<char> = Vec::new();
for c in line.bytes() {
l.push(c as char)
}
m.push(l)
}
let mut hm: HashMap<(usize, usize), (u32, u32)> = HashMap::new();
let mut id: u32 = 0;
for y in 0..m.len() {
let mut have_num = false;
let mut num_valid = false;
let mut start_x = 0;
for x in 0..m[0].len() {
if have_num {
if m[y][x].is_digit(10) == true && x == (m[0].len() - 1) {
if num_valid {
let num: u32 = String::from_iter(m[y][start_x..=x].iter()).parse().unwrap();
for xx in start_x..=x {
hm.insert((xx, y), (id, num));
}
id += 1;
res1 += num;
}
have_num = false;
num_valid = false;
} else if m[y][x].is_digit(10) == false {
if num_valid {
let num: u32 = String::from_iter(m[y][start_x..x].iter()).parse().unwrap();
for xx in start_x..x {
hm.insert((xx, y), (id, num));
}
id += 1;
res1 += num;
}
have_num = false;
num_valid = false;
}
} else if m[y][x].is_digit(10) {
have_num = true;
start_x = x;
}
if have_num {
num_valid = num_valid || is_valid(x, y, &m);
}
}
}
println!("{:?}", hm);
for y in 0..m.len() {
for x in 0..m[0].len() {
if m[y][x] == '*' {
// println!("{} {}", y+1, x+1);
let mut neighbour: HashMap<u32, u32> = HashMap::new();
for dy in -1i32..2 {
for dx in -1i32..2 {
let mut xx: usize;
let mut yy: usize;
if x == 0 && dx == -1 {
xx = x;
} else if x == m[0].len() - 1 && dx == 1 {
xx = x;
} else {
xx = ((x as i32) + dx) as usize;
}
if y == 0 && dy == -1 {
yy = y;
} else if y == m.len() - 1 && dy == 1 {
yy = y;
} else {
yy = ((y as i32) + dy) as usize;
}
if let Some((id, val)) = hm.get(&(xx, yy)) {
neighbour.insert(*id, *val);
}
}
}
if neighbour.len() == 2 {
let mut mul: u32 = 1;
for (key, val) in neighbour.iter() {
mul *= val;
}
// res2 += neighbour.iter().map(|(_, val)| val).reduce(|a,b| a*b).unwrap();
println!("{}", mul);
res2 += mul;
}
// let a: u32 = neighbour.iter()
// .inspect(|x| println!("asdf {:?}", x))
// .map(|(_, val)| val)
// .reduce(|a,b| a*b);
// println!("{:?}", a);
// println!("{:?}", neighbour);
// asdf
}
}
}
println!("res1: {}", res1);
println!("res2: {}", res2);
}
|
