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#![allow(dead_code)]
#![allow(unused_variables)]
#![allow(unused_mut)]
use std::cmp::min;
use std::collections::HashMap;
use std::collections::HashSet;
use std::env;
use std::fs::File;
use std::io::Read;
fn dfs(
depth: i64,
sx: i64,
sy: i64,
size: i64,
m: &Vec<Vec<bool>>,
lut: &mut HashMap<(i64, i64), i64>,
) -> i64 {
if sx == size - 1 && sy == size - 1 {
return depth;
}
if let Some(val) = lut.get(&(sx, sy)) {
if *val < depth {
return 99999999999;
}
}
lut.insert((sx, sy), depth);
let mut s = 99999999999;
for (dx, dy) in [(1, 0), (-1, 0), (0, 1), (0, -1)] {
let mut x = sx + dx;
let mut y = sy + dy;
if 0 <= x && x < size && 0 <= y && y < size {
if m[y as usize][x as usize] {
let a = dfs(depth + 1, x, y, size, &m, lut);
s = min(s, a);
}
}
}
return s;
}
fn bfs(size: i64, m: &Vec<Vec<bool>>) -> i64 {
let mut new_pos: HashSet<(i64, i64)> = HashSet::new();
let mut all_pos: HashSet<(i64, i64)> = HashSet::new();
let mut cur_pos: HashSet<(i64, i64)>;
new_pos.insert((0, 0));
all_pos = &all_pos | &new_pos;
cur_pos = new_pos.clone();
new_pos.clear();
for depth in 0.. {
for (sx, sy) in cur_pos.clone() {
for (dx, dy) in [(1, 0), (-1, 0), (0, 1), (0, -1)] {
let mut x = sx + dx;
let mut y = sy + dy;
if sx == size - 1 && sy == size - 1 {
return depth;
}
if 0 <= x && x < size && 0 <= y && y < size {
if m[y as usize][x as usize] {
if !all_pos.contains(&(x, y)) {
new_pos.insert((x, y));
}
}
}
}
}
if new_pos.len() == 0 {
return 0;
}
all_pos = &all_pos | &new_pos;
cur_pos = new_pos.clone();
new_pos.clear();
}
return 0;
}
fn print_m(m: &Vec<Vec<bool>>) {
for l in m {
for c in l {
if *c == true {
print!(".");
} else {
print!("#");
}
}
println!();
}
}
fn main() {
let args: Vec<String> = env::args().collect();
let filename = if args.len() == 1 {
"in/".to_owned() + args[0].split('/').last().unwrap() + ".pzl"
} else {
args[1].clone()
};
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 = content.trim_end().split("\n");
let mut bytes: Vec<(i64, i64)> = Vec::new();
for line in lines {
let (a, b) = line.split_once(',').unwrap();
bytes.push((a.parse().unwrap(), b.parse().unwrap()));
}
//println!("{:?}", bytes);
//let size = 6 + 1;
//let mut fall = 12;
let size = 70 + 1;
let mut fall = 1024;
let mut m: Vec<Vec<bool>> = vec![vec![true; size]; size];
for i in 0..fall {
let x = bytes[i].0 as usize;
let y = bytes[i].1 as usize;
m[y][x] = false;
}
//print_m(&m);
let mut lut: HashMap<(i64, i64), i64> = HashMap::new();
//let res1 = dfs(0, 0, 0, size as i64, &m, &mut lut);
let res1 = bfs(size as i64, &m);
let mut res2;
loop {
let x = bytes[fall].0 as usize;
let y = bytes[fall].1 as usize;
m[y][x] = false;
fall += 1;
let res = bfs(size as i64, &m);
if res == 0 {
res2 = format!("{},{}", x, y);
break;
}
}
println!("res1: {}", res1);
println!("res2: {}", res2);
assert_eq!(res1, 324);
assert_eq!(res2, "46,23");
}
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