#526503 (Rust) No.1147 土偶Ⅱ

• 問題: No.1147 土偶Ⅱ
• ユーザー: cympfh
• 提出日時: 2020-08-08 01:24:31
• 言語: Rust (1.77.0)
• 結果: AC
• 実行時間: 7 ms / 500 ms
• コード長: 4,652 bytes
• コンパイル時間: 883 ms
• コンパイル使用メモリ: 171,640 KB
• 実行使用メモリ: 5,376 KB
• 最終ジャッジ日時: 2024-04-19 18:06:50
• 合計ジャッジ時間: 1,574 ms
• ジャッジサーバーID （参考情報）: judge3 / judge2

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	1 ms; 5,248 KB
testcase_01	AC	0 ms; 5,376 KB
testcase_02	AC	0 ms; 5,376 KB
testcase_03	AC	1 ms; 5,376 KB
testcase_04	AC	2 ms; 5,376 KB
testcase_05	AC	1 ms; 5,376 KB
testcase_06	AC	2 ms; 5,376 KB
testcase_07	AC	4 ms; 5,376 KB
testcase_08	AC	1 ms; 5,376 KB
testcase_09	AC	2 ms; 5,376 KB
testcase_10	AC	1 ms; 5,376 KB
testcase_11	AC	7 ms; 5,376 KB
testcase_12	AC	2 ms; 5,376 KB
testcase_13	AC	1 ms; 5,376 KB
testcase_14	AC	5 ms; 5,376 KB
testcase_15	AC	2 ms; 5,376 KB
testcase_16	AC	1 ms; 5,376 KB
testcase_17	AC	1 ms; 5,376 KB
testcase_18	AC	1 ms; 5,376 KB
testcase_19	AC	2 ms; 5,376 KB
testcase_20	AC	1 ms; 5,376 KB
testcase_21	AC	1 ms; 5,376 KB
testcase_22	AC	2 ms; 5,376 KB

ソースコード

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

macro_rules! min {
    (.. $x:expr) => {{
        let mut it = $x.iter();
        it.next().map(|z| it.fold(z, |x, y| min!(x, y)))
    }};
    ($x:expr) => ($x);
    ($x:expr, $($ys:expr),*) => {{
        let t = min!($($ys),*);
        if $x < t { $x } else { t }
    }}
}
macro_rules! max {
    (.. $x:expr) => {{
        let mut it = $x.iter();
        it.next().map(|z| it.fold(z, |x, y| max!(x, y)))
    }};
    ($x:expr) => ($x);
    ($x:expr, $($ys:expr),*) => {{
        let t = max!($($ys),*);
        if $x > t { $x } else { t }
    }}
}
macro_rules! ewriteln {
    ($($args:expr),*) => { let _ = writeln!(&mut std::io::stderr(), $($args),*); };
}
macro_rules! trace {
    ($x:expr) => { ewriteln!(">>> {} = {:?}", stringify!($x), $x) };
    ($($xs:expr),*) => { trace!(($($xs),*)) }
}
macro_rules! flush {
    () => {
        std::io::stdout().flush().unwrap();
    };
}
macro_rules! put {
    (.. $x:expr) => {{
        let mut it = $x.iter();
        if let Some(x) = it.next() { print!("{}", x); }
        for x in it { print!(" {}", x); }
        println!("");
    }};
    ($x:expr) => { println!("{}", $x) };
    ($x:expr, $($xs:expr),*) => { print!("{} ", $x); put!($($xs),*) }
}

trait Group:
    std::ops::Add<Output = Self>
    + std::ops::Sub<Output = Self>
    + std::ops::Neg<Output = Self>
    + std::iter::Sum
    + Clone
    + Copy
{
    fn zero() -> Self;
}
impl Group for i32 {
    fn zero() -> Self {
        0
    }
}
impl Group for i64 {
    fn zero() -> Self {
        0
    }
}
impl Group for i128 {
    fn zero() -> Self {
        0
    }
}
impl Group for f32 {
    fn zero() -> Self {
        0.0
    }
}
impl Group for f64 {
    fn zero() -> Self {
        0.0
    }
}

#[derive(PartialEq, Eq, PartialOrd, Ord, Clone, Copy, Debug)]
enum Hyper<X> {
    NegInf,
    Real(X),
    Inf,
}
use Hyper::{Inf, NegInf, Real};
impl<X> Hyper<X> {
    fn unwrap(self) -> X {
        if let Hyper::Real(x) = self {
            x
        } else {
            panic!()
        }
    }
}
impl<X: Group> std::ops::Add for Hyper<X> {
    type Output = Self;
    fn add(self, rhs: Hyper<X>) -> Hyper<X> {
        match (self, rhs) {
            (Real(x), Real(y)) => Real(x + y),
            (Inf, _) => Inf,
            (_, Inf) => Inf,
            _ => NegInf,
        }
    }
}
impl<X: Group> std::ops::Sub for Hyper<X> {
    type Output = Self;
    fn sub(self, rhs: Hyper<X>) -> Hyper<X> {
        self + (-rhs)
    }
}
impl<X: Group> std::ops::Neg for Hyper<X> {
    type Output = Self;
    fn neg(self) -> Hyper<X> {
        match self {
            Inf => NegInf,
            NegInf => Inf,
            Real(x) => Real(-x),
        }
    }
}

fn wall<X: Group + PartialOrd>(d: &mut Vec<Vec<Hyper<X>>>) {
    let n = d.len();
    for k in 0..n {
        for i in 0..n {
            for j in 0..n {
                d[i][j] = min!(d[i][j], d[i][k] + d[k][j]);
            }
        }
    }
}

fn main() {
    let mut sc = Scanner::new();
    let n: usize = sc.cin();
    let m: usize = sc.cin();
    let mut d: Vec<Vec<Hyper<i64>>> = vec![vec![Inf; n]; n];
    for i in 0..n {
        d[i][i] = Real(0);
    }
    for _ in 0..m {
        let a = sc.cin::<usize>() - 1;
        let b = sc.cin::<usize>() - 1;
        d[a][b] = Real(1);
        d[b][a] = Real(1);
    }
    wall(&mut d);
    let mut ans = 0;
    for i in 0..n {
        for j in 0..i {
            if d[i][j] == Real(2) {
                continue;
            }
            for k in 0..j {
                if d[i][k] == Real(2) {
                    continue;
                }
                if d[j][k] == Real(2) {
                    continue;
                }
                ans += 1;
            }
        }
    }
    put!(ans);
}

use std::collections::VecDeque;
use std::io::{self, Write};
use std::str::FromStr;

struct Scanner {
    stdin: io::Stdin,
    buffer: VecDeque<String>,
}
impl Scanner {
    fn new() -> Self {
        Scanner {
            stdin: io::stdin(),
            buffer: VecDeque::new(),
        }
    }
    fn cin<T: FromStr>(&mut self) -> T {
        while self.buffer.is_empty() {
            let mut line = String::new();
            let _ = self.stdin.read_line(&mut line);
            for w in line.split_whitespace() {
                self.buffer.push_back(String::from(w));
            }
        }
        self.buffer.pop_front().unwrap().parse::<T>().ok().unwrap()
    }
    fn chars(&mut self) -> Vec<char> {
        self.cin::<String>().chars().collect()
    }
    fn vec<T: FromStr>(&mut self, n: usize) -> Vec<T> {
        (0..n).map(|_| self.cin()).collect()
    }
}