結果
問題 |
No.3111 Toll Optimization
|
ユーザー |
|
提出日時 | 2025-04-19 00:50:56 |
言語 | Rust (1.83.0 + proconio) |
結果 |
AC
|
実行時間 | 217 ms / 5,000 ms |
コード長 | 1,832 bytes |
コンパイル時間 | 14,024 ms |
コンパイル使用メモリ | 386,072 KB |
実行使用メモリ | 29,696 KB |
最終ジャッジ日時 | 2025-04-19 00:51:19 |
合計ジャッジ時間 | 18,591 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 70 |
コンパイルメッセージ
warning: constant `DIRS` is never used --> src/main.rs:5:7 | 5 | const DIRS: [(isize, isize); 4] = [(0, 1), (1, 0), (0, -1), (-1, 0)]; | ^^^^ | = note: `#[warn(dead_code)]` on by default warning: method `chmax` is never used --> src/main.rs:8:8 | 7 | trait OrdExt { | ------ method in this trait 8 | fn chmax(&mut self, other: Self) -> bool; | ^^^^^ warning: variable `N` should have a snake case name --> src/main.rs:35:9 | 35 | N: usize, | ^ help: convert the identifier to snake case: `n` | = note: `#[warn(non_snake_case)]` on by default warning: variable `M` should have a snake case name --> src/main.rs:36:9 | 36 | M: usize, | ^ help: convert the identifier to snake case: `m` warning: variable `K` should have a snake case name --> src/main.rs:37:9 | 37 | K: usize, | ^ help: convert the identifier to snake case (notice the capitalization): `k` warning: variable `C` should have a snake case name --> src/main.rs:38:9 | 38 | C: [usize; M], | ^ help: convert the identifier to snake case (notice the capitalization): `c`
ソースコード
use std::{cmp::Reverse, collections::BinaryHeap}; use proconio::{fastout, input, marker::Usize1}; const DIRS: [(isize, isize); 4] = [(0, 1), (1, 0), (0, -1), (-1, 0)]; trait OrdExt { fn chmax(&mut self, other: Self) -> bool; fn chmin(&mut self, other: Self) -> bool; } impl<T: Ord> OrdExt for T { fn chmax(&mut self, other: Self) -> bool { if *self < other { *self = other; true } else { false } } fn chmin(&mut self, other: Self) -> bool { if *self > other { *self = other; true } else { false } } } #[fastout] fn main() { input! { N: usize, M: usize, K: usize, C: [usize; M], edges: [(Usize1, Usize1); M], } let mut graph = vec![vec![]; N]; for (i, &(a, b)) in edges.iter().enumerate() { graph[a].push((b, C[i])); graph[b].push((a, C[i])); } let mut priq = BinaryHeap::new(); let mut locked = vec![vec![false; K + 1]; N]; let mut dist = vec![vec![std::usize::MAX / 4; K + 1]; N]; priq.push(Reverse((0, 0, K))); while let Some(Reverse((d, v, k))) = priq.pop() { if locked[v][k] { continue; } locked[v][k] = true; for &(w, c) in graph[v].iter() { if locked[w][k] { continue; } if dist[w][k].chmin(d + c) { priq.push(Reverse((dist[w][k], w, k))); } if k > 0 && dist[w][k - 1].chmin(d) { priq.push(Reverse((dist[w][k - 1], w, k - 1))); } } } let &ans = dist[N - 1].iter().min().unwrap(); if ans == std::usize::MAX / 4 { println!("-1"); } else { println!("{}", ans); } }