結果
問題 |
No.2328 Build Walls
|
ユーザー |
|
提出日時 | 2023-06-10 01:30:38 |
言語 | Rust (1.83.0 + proconio) |
結果 |
WA
|
実行時間 | - |
コード長 | 2,547 bytes |
コンパイル時間 | 13,031 ms |
コンパイル使用メモリ | 395,080 KB |
実行使用メモリ | 822,588 KB |
最終ジャッジ日時 | 2025-01-02 08:09:42 |
合計ジャッジ時間 | 125,457 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | WA * 1 TLE * 1 MLE * 1 |
other | WA * 7 TLE * 14 MLE * 13 |
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, collections::*}; use crate::scanner::Scanner; const INF: isize = 1e18 as isize; 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 = 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 mut dist = vec![vec![INF; w]; h]; let mut que = 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 !(ni < h && nj < w && wall[ni][nj]) { continue } let nd = cd + grid[ni][nj]; if dist[ni][nj] > nd { dist[ni][nj] = nd; que.push(Reverse((nd, ni, nj))); } } } let mut ans = INF; for i in 0..h { ans = ans.min(dist[i][w-1]); } if ans == INF { println!("{}", -1); } else { println!("{}", ans); } }