結果
| 問題 |
No.2328 Build Walls
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2023-05-28 15:38:36 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
AC
|
| 実行時間 | 154 ms / 3,000 ms |
| コード長 | 2,639 bytes |
| コンパイル時間 | 23,779 ms |
| コンパイル使用メモリ | 401,888 KB |
| 実行使用メモリ | 12,800 KB |
| 最終ジャッジ日時 | 2024-12-27 07:53:05 |
| 合計ジャッジ時間 | 27,592 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 34 |
ソースコード
pub mod scanner {
pub struct Scanner {
buf: Vec<String>,
}
impl Scanner {
pub fn new() -> Self {
Self { buf: vec![] }
}
pub fn new_from(source: &str) -> Self {
let source = String::from(source);
let buf = Self::split(source);
Self { buf }
}
pub fn next<T: std::str::FromStr>(&mut self) -> T {
loop {
if let Some(x) = self.buf.pop() {
return x.parse().ok().expect("");
}
let mut source = String::new();
std::io::stdin().read_line(&mut source).expect("");
self.buf = Self::split(source);
}
}
fn split(source: String) -> Vec<String> {
source
.split_whitespace()
.rev()
.map(String::from)
.collect::<Vec<_>>()
}
}
}
use std::cmp::Reverse;
use crate::scanner::Scanner;
const DIJ: [(usize, usize); 8] = [
(!0, !0),
(!0, 0),
(!0, 1),
(0, !0),
(0, 1),
(1, !0),
(1, 0),
(1, 1),
];
fn main() {
let mut scanner = Scanner::new();
let t: usize = 1;
for _ in 0..t {
solve(&mut scanner);
}
}
fn solve(scanner: &mut Scanner) {
let h: usize = scanner.next();
let w: usize = scanner.next();
let h = h - 2;
let mut grid = vec![vec![-1 as isize; w]; h];
let mut wall = vec![vec![false; w]; h];
for i in 0..h {
for j in 0..w {
grid[i][j] = scanner.next();
wall[i][j] = grid[i][j] == -1;
}
}
let inf = 1e18 as isize;
let mut dist = vec![vec![inf; w]; h];
let mut que = std::collections::BinaryHeap::new();
for i in 0..h {
if !wall[i][0] {
dist[i][0] = grid[i][0];
que.push(Reverse((grid[i][0], i, 0)));
}
}
while let Some(Reverse((cd, ci, cj))) = que.pop() {
if dist[ci][cj] < cd {
continue;
}
for &(di, dj) in DIJ.iter() {
let ni = ci + di;
let nj = cj + dj;
if h <= ni || w <= nj || wall[ni][nj] {
continue;
}
let nd = cd + grid[ni][nj];
if dist[ni][nj] <= nd {
continue;
}
dist[ni][nj] = nd;
que.push(Reverse((nd, ni, nj)));
}
}
let mut ans = inf;
for i in 0..h {
if dist[i][w - 1] < inf {
ans = ans.min(dist[i][w - 1]);
}
}
if ans == inf {
ans = -1;
}
println!("{}", ans);
}