結果
| 問題 |
No.402 最も海から遠い場所
|
| ユーザー |
|
| 提出日時 | 2016-08-04 16:11:54 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
MLE
|
| 実行時間 | - |
| コード長 | 2,628 bytes |
| コンパイル時間 | 26,399 ms |
| コンパイル使用メモリ | 377,644 KB |
| 実行使用メモリ | 816,640 KB |
| 最終ジャッジ日時 | 2024-11-07 00:01:53 |
| 合計ジャッジ時間 | 25,800 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 16 MLE * 1 -- * 2 |
ソースコード
#[allow(unused_imports)]
use std::cmp::*;
#[allow(unused_imports)]
use std::collections::*;
use std::io::*;
#[allow(dead_code)]
fn getline() -> String {
let mut ret = String::new();
std::io::stdin().read_line(&mut ret).ok();
return ret;
}
fn get_word() -> String {
let mut stdin = std::io::stdin();
let mut u8b: [u8; 1] = [0];
loop {
let mut buf: Vec<u8> = Vec::with_capacity(16);
loop {
let res = stdin.read(&mut u8b);
if res.is_err() || res.ok().unwrap() == 0 || u8b[0] <= ' ' as u8 {
break;
} else {
buf.push(u8b[0]);
}
}
if buf.len() >= 1 {
let ret = std::string::String::from_utf8(buf).unwrap();
return ret;
}
}
}
fn parse<T: std::str::FromStr>(s: &str) -> T { s.parse::<T>().ok().unwrap() }
#[allow(dead_code)]
fn get<T: std::str::FromStr>() -> T { parse(&get_word()) }
fn main() {
let h: i32 = get();
let w: i32 = get();
let s: Vec<Vec<char>> = (0 .. h).map(|_| get_word().chars().collect()).collect();
let mut que: VecDeque<(i32, i32, i32)> = VecDeque::with_capacity(((h + 2) * (w + 2)) as usize);
let mut dp: Vec<Vec<i32>> = (0 .. h).map(|_| vec![100_000; w as usize]).collect();
for i in 0 .. w {
que.push_back((1, 0, i as i32));
que.push_back((1, h - 1, i as i32));
}
for j in 0 .. h {
que.push_back((1, j as i32, 0));
que.push_back((1, j as i32, w - 1));
}
for i in 0 .. h {
for j in 0 .. w {
if s[i as usize][j as usize] == '.' {
que.push_back((0, i, j));
}
}
}
while let Some((cost, x, y)) = que.pop_front() {
if !(x >= 0 && x < h && y >= 0 && y < w) ||
cost < dp[x as usize][y as usize] {
if x >= 0 && x < h && y >= 0 && y < w {
dp[x as usize][y as usize] = cost;
}
for dx in -1 .. 2 {
for dy in -1 .. 2 {
if dx * dx + dy * dy == 0 {
continue;
}
let nx = x + dx;
let ny = y + dy;
if nx < 0 || nx >= h || ny < 0 || ny >= w {
continue;
}
que.push_back((cost + 1, nx, ny));
}
}
}
}
let mut ma: i32 = 0;
for i in 0 .. h {
ma = max(ma, *dp[i as usize].iter().max().unwrap());
}
println!("{}", ma);
}