結果

問題 No.1605 Matrix Shape
ユーザー akakimidoriakakimidori
提出日時 2021-07-16 21:32:51
言語 Rust
(1.77.0)
結果
AC  
実行時間 131 ms / 2,000 ms
コード長 4,147 bytes
コンパイル時間 3,271 ms
コンパイル使用メモリ 156,740 KB
実行使用メモリ 13,744 KB
最終ジャッジ日時 2023-09-20 13:11:27
合計ジャッジ時間 6,671 ms
ジャッジサーバーID
（参考情報） 		judge11 / judge12
このコードへのチャレンジ
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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
4,380 KB
testcase_01 AC 1 ms
4,376 KB
testcase_02 AC 1 ms
4,376 KB
testcase_03 AC 1 ms
4,376 KB
testcase_04 AC 1 ms
4,376 KB
testcase_05 AC 1 ms
4,376 KB
testcase_06 AC 1 ms
4,380 KB
testcase_07 AC 1 ms
4,376 KB
testcase_08 AC 1 ms
4,380 KB
testcase_09 AC 1 ms
4,376 KB
testcase_10 AC 1 ms
4,376 KB
testcase_11 AC 1 ms
4,380 KB
testcase_12 AC 1 ms
4,380 KB
testcase_13 AC 1 ms
4,380 KB
testcase_14 AC 1 ms
4,380 KB
testcase_15 AC 1 ms
4,380 KB
testcase_16 AC 1 ms
4,376 KB
testcase_17 AC 1 ms
4,376 KB
testcase_18 AC 1 ms
4,376 KB
testcase_19 AC 130 ms
13,704 KB
testcase_20 AC 119 ms
13,440 KB
testcase_21 AC 120 ms
13,468 KB
testcase_22 AC 131 ms
13,736 KB
testcase_23 AC 129 ms
13,744 KB
testcase_24 AC 128 ms
13,712 KB
testcase_25 AC 77 ms
11,292 KB
testcase_26 AC 78 ms
11,316 KB
testcase_27 AC 77 ms
11,396 KB
testcase_28 AC 77 ms
11,376 KB
testcase_29 AC 78 ms
11,384 KB
testcase_30 AC 121 ms
13,424 KB
testcase_31 AC 122 ms
13,444 KB
testcase_32 AC 109 ms
13,408 KB
testcase_33 AC 108 ms
13,396 KB
testcase_34 AC 21 ms
12,212 KB
testcase_35 AC 91 ms
10,276 KB
testcase_36 AC 54 ms
7,764 KB
権限があれば一括ダウンロードができます
コンパイルメッセージ
warning: unused import: `std::io::Write`
   --> Main.rs:114:5
    |
114 | use std::io::Write;
    |     ^^^^^^^^^^^^^^
    |
    = note: `#[warn(unused_imports)]` on by default

warning: type alias `Map` is never used
   --> Main.rs:117:6
    |
117 | type Map<K, V> = BTreeMap<K, V>;
    |      ^^^
    |
    = note: `#[warn(dead_code)]` on by default

warning: type alias `Set` is never used
   --> Main.rs:118:6
    |
118 | type Set<T> = BTreeSet<T>;
    |      ^^^

warning: type alias `Deque` is never used
   --> Main.rs:119:6
    |
119 | type Deque<T> = VecDeque<T>;
    |      ^^^^^

warning: 4 warnings emitted

ソースコード

diff # 

//---------- begin union_find ----------
pub struct DSU {
    p: Vec<i32>,
}
impl DSU {
    pub fn new(n: usize) -> DSU {
        assert!(n < std::i32::MAX as usize);
        DSU { p: vec![-1; n] }
    }
    pub fn init(&mut self) {
        self.p.iter_mut().for_each(|p| *p = -1);
    }
    pub fn root(&self, mut x: usize) -> usize {
        assert!(x < self.p.len());
        while self.p[x] >= 0 {
            x = self.p[x] as usize;
        }
        x
    }
    pub fn same(&self, x: usize, y: usize) -> bool {
        assert!(x < self.p.len() && y < self.p.len());
        self.root(x) == self.root(y)
    }
    pub fn unite(&mut self, x: usize, y: usize) -> Option<(usize, usize)> {
        assert!(x < self.p.len() && y < self.p.len());
        let mut x = self.root(x);
        let mut y = self.root(y);
        if x == y {
            return None;
        }
        if self.p[x] > self.p[y] {
            std::mem::swap(&mut x, &mut y);
        }
        self.p[x] += self.p[y];
        self.p[y] = x as i32;
        Some((x, y))
    }
    pub fn parent(&self, x: usize) -> Option<usize> {
        assert!(x < self.p.len());
        let p = self.p[x];
        if p >= 0 {
            Some(p as usize)
        } else {
            None
        }
    }
    pub fn sum<F>(&self, mut x: usize, mut f: F) -> usize
    where
        F: FnMut(usize),
    {
        while let Some(p) = self.parent(x) {
            f(x);
            x = p;
        }
        x
    }
    pub fn size(&self, x: usize) -> usize {
        assert!(x < self.p.len());
        let r = self.root(x);
        (-self.p[r]) as usize
    }
}
//---------- end union_find ----------
// ---------- begin input macro ----------
// reference: https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8
macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
    ($($r:tt)*) => {
        let s = {
            use std::io::Read;
            let mut s = String::new();
            std::io::stdin().read_to_string(&mut s).unwrap();
            s
        };
        let mut iter = s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
}

macro_rules! input_inner {
    ($iter:expr) => {};
    ($iter:expr, ) => {};
    ($iter:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($iter, $t);
        input_inner!{$iter $($r)*}
    };
}

macro_rules! read_value {
    ($iter:expr, ( $($t:tt),* )) => {
        ( $(read_value!($iter, $t)),* )
    };
    ($iter:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>()
    };
    ($iter:expr, chars) => {
        read_value!($iter, String).chars().collect::<Vec<char>>()
    };
    ($iter:expr, bytes) => {
        read_value!($iter, String).bytes().collect::<Vec<u8>>()
    };
    ($iter:expr, usize1) => {
        read_value!($iter, usize) - 1
    };
    ($iter:expr, $t:ty) => {
        $iter.next().unwrap().parse::<$t>().expect("Parse error")
    };
}
// ---------- end input macro ----------

use std::io::Write;
use std::collections::*;

type Map<K, V> = BTreeMap<K, V>;
type Set<T> = BTreeSet<T>;
type Deque<T> = VecDeque<T>;

fn cond(b: bool) {
    if !b {
        println!("0");
        std::process::exit(0);
    }
}

fn run() {
    input! {
        n: usize,
        e: [(usize, usize); n],
    }
    let mut z = vec![];
    for e in e.iter() {
        z.push(e.0);
        z.push(e.1);
    }
    z.sort();
    z.dedup();
    let mut dsu = DSU::new(z.len());
    let mut deg = vec![0i32; z.len()];
    for (a, b) in e {
        let a = z.binary_search(&a).unwrap();
        let b = z.binary_search(&b).unwrap();
        dsu.unite(a, b);
        deg[a] += 1;
        deg[b] -= 1;
    }
    cond(dsu.size(0) == z.len());
    let mut a = 0;
    let mut b = 0;
    for d in deg.iter() {
        cond(d.abs() <= 1);
        if *d > 0 {
            a += 1;
        }
        if *d < 0 {
            b += 1;
        }
    }
    cond(a <= 1 && b <= 1);
    if a > 0 {
        println!("1");
    } else {
        println!("{}", z.len());
    }
}

fn main() {
    run();
}
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