結果

問題 No.1065 電柱 / Pole (Easy)
ユーザー kakikaki
提出日時 2020-05-29 22:15:42
言語 Rust
(1.77.0 + proconio)
結果
AC  
実行時間 240 ms / 2,000 ms
コード長 3,693 bytes
コンパイル時間 13,495 ms
コンパイル使用メモリ 388,608 KB
実行使用メモリ 27,096 KB
最終ジャッジ日時 2024-11-06 05:14:51
合計ジャッジ時間 19,448 ms
ジャッジサーバーID
(参考情報)
judge3 / judge1
このコードへのチャレンジ
(要ログイン)

テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 1 ms
6,820 KB
testcase_01 AC 1 ms
6,816 KB
testcase_02 AC 111 ms
14,848 KB
testcase_03 AC 120 ms
23,424 KB
testcase_04 AC 120 ms
23,276 KB
testcase_05 AC 87 ms
23,108 KB
testcase_06 AC 87 ms
23,040 KB
testcase_07 AC 26 ms
8,704 KB
testcase_08 AC 95 ms
26,808 KB
testcase_09 AC 9 ms
6,816 KB
testcase_10 AC 44 ms
13,184 KB
testcase_11 AC 30 ms
9,728 KB
testcase_12 AC 22 ms
6,816 KB
testcase_13 AC 102 ms
14,848 KB
testcase_14 AC 126 ms
18,176 KB
testcase_15 AC 148 ms
21,396 KB
testcase_16 AC 64 ms
10,240 KB
testcase_17 AC 176 ms
22,236 KB
testcase_18 AC 45 ms
7,936 KB
testcase_19 AC 150 ms
21,888 KB
testcase_20 AC 33 ms
7,808 KB
testcase_21 AC 52 ms
9,344 KB
testcase_22 AC 134 ms
19,700 KB
testcase_23 AC 2 ms
6,816 KB
testcase_24 AC 2 ms
6,816 KB
testcase_25 AC 19 ms
6,820 KB
testcase_26 AC 72 ms
12,672 KB
testcase_27 AC 76 ms
11,776 KB
testcase_28 AC 130 ms
17,664 KB
testcase_29 AC 14 ms
6,820 KB
testcase_30 AC 147 ms
21,420 KB
testcase_31 AC 99 ms
16,768 KB
testcase_32 AC 60 ms
11,648 KB
testcase_33 AC 152 ms
22,144 KB
testcase_34 AC 42 ms
8,192 KB
testcase_35 AC 149 ms
21,500 KB
testcase_36 AC 2 ms
6,820 KB
testcase_37 AC 2 ms
6,820 KB
testcase_38 AC 2 ms
6,820 KB
testcase_39 AC 2 ms
6,816 KB
testcase_40 AC 1 ms
6,820 KB
testcase_41 AC 240 ms
27,096 KB
testcase_42 AC 57 ms
9,856 KB
testcase_43 AC 110 ms
15,360 KB
testcase_44 AC 31 ms
7,040 KB
testcase_45 AC 103 ms
15,004 KB
testcase_46 AC 1 ms
6,820 KB
testcase_47 AC 1 ms
6,816 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

#![allow(non_snake_case)]
#![allow(dead_code)]
#![allow(unused_macros)]
#![allow(unused_imports)]

use std::str::FromStr;
use std::io::*;
use std::collections::*;
use std::cmp::*;

use std::f64::INFINITY;

struct Scanner<I: Iterator<Item = char>> {
    iter: std::iter::Peekable<I>,
}

macro_rules! exit {
    () => {{
        exit!(0)
    }};
    ($code:expr) => {{
        if cfg!(local) {
            writeln!(std::io::stderr(), "===== Terminated =====")
                .expect("failed printing to stderr");
        }
        std::process::exit($code);
    }}
}

impl<I: Iterator<Item = char>> Scanner<I> {
    pub fn new(iter: I) -> Scanner<I> {
        Scanner {
            iter: iter.peekable(),
        }
    }

    pub fn safe_get_token(&mut self) -> Option<String> {
        let token = self.iter
            .by_ref()
            .skip_while(|c| c.is_whitespace())
            .take_while(|c| !c.is_whitespace())
            .collect::<String>();
        if token.is_empty() {
            None
        } else {
            Some(token)
        }
    }

    pub fn token(&mut self) -> String {
        self.safe_get_token().unwrap_or_else(|| exit!())
    }

    pub fn get<T: FromStr>(&mut self) -> T {
        self.token().parse::<T>().unwrap_or_else(|_| exit!())
    }

    pub fn vec<T: FromStr>(&mut self, len: usize) -> Vec<T> {
        (0..len).map(|_| self.get()).collect()
    }

    pub fn mat<T: FromStr>(&mut self, row: usize, col: usize) -> Vec<Vec<T>> {
        (0..row).map(|_| self.vec(col)).collect()
    }

    pub fn char(&mut self) -> char {
        self.iter.next().unwrap_or_else(|| exit!())
    }

    pub fn chars(&mut self) -> Vec<char> {
        self.get::<String>().chars().collect()
    }

    pub fn mat_chars(&mut self, row: usize) -> Vec<Vec<char>> {
        (0..row).map(|_| self.chars()).collect()
    }

    pub fn line(&mut self) -> String {
        if self.peek().is_some() {
            self.iter
                .by_ref()
                .take_while(|&c| !(c == '\n' || c == '\r'))
                .collect::<String>()
        } else {
            exit!();
        }
    }

    pub fn peek(&mut self) -> Option<&char> {
        self.iter.peek()
    }
}

#[derive(PartialEq)]
struct MinFloat(f64);

impl Eq for MinFloat {}

impl PartialOrd for MinFloat {
    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
        other.0.partial_cmp(&self.0)
    }
}

impl Ord for MinFloat {
    fn cmp(&self, other: &Self) -> Ordering {
        other.0.partial_cmp(&self.0).unwrap()
    }
}

fn main() {
    let cin = stdin();
    let cin = cin.lock();
    let mut sc = Scanner::new(cin.bytes().map(|c| c.unwrap() as char));
    let N: usize = sc.get();
    let M: usize = sc.get();
    let X: usize = sc.get::<usize>()-1;
    let Y: usize = sc.get::<usize>()-1;
    let mut p: Vec<f64> = vec![0.; N];
    let mut q: Vec<f64> = vec![0.; N];
    for i in 0..N {
        p[i] = sc.get();
        q[i] = sc.get();
    }
    let mut adj = vec![Vec::new(); N];
    for _ in 0..M {
        let P: usize = sc.get::<usize>()-1;
        let Q: usize = sc.get::<usize>()-1;
        let cost = (p[P] - p[Q]).hypot(q[P] - q[Q]);
        adj[P].push((Q, cost));
        adj[Q].push((P, cost));
    }
    let mut bh = BinaryHeap::new();
    bh.push((MinFloat(0.), X));
    let mut dp = vec![INFINITY; N];
    dp[X] = 0.;
    while let Some((MinFloat(cost), now)) = bh.pop() {
        if dp[now] < cost {
            continue;
        }
        for &(to, cost) in &adj[now] {
            if dp[to] > dp[now] + cost {
                dp[to] = dp[now] + cost;
                bh.push((MinFloat(dp[to]), to));
            }
        }
    }
    println!("{}", dp[Y]);
}
0