結果

問題 No.1843 Tree ANDistance
ユーザー akakimidoriakakimidori
提出日時 2022-02-18 21:44:39
言語 Rust
(1.77.0 + proconio)
結果
AC  
実行時間 77 ms / 2,000 ms
コード長 3,808 bytes
コンパイル時間 12,968 ms
コンパイル使用メモリ 377,720 KB
実行使用メモリ 6,784 KB
最終ジャッジ日時 2024-06-29 08:35:44
合計ジャッジ時間 15,958 ms
ジャッジサーバーID
(参考情報)
judge1 / judge2
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 74 ms
6,784 KB
testcase_01 AC 74 ms
6,656 KB
testcase_02 AC 69 ms
6,784 KB
testcase_03 AC 69 ms
6,784 KB
testcase_04 AC 74 ms
6,784 KB
testcase_05 AC 65 ms
6,784 KB
testcase_06 AC 77 ms
6,784 KB
testcase_07 AC 70 ms
6,528 KB
testcase_08 AC 71 ms
6,656 KB
testcase_09 AC 65 ms
6,400 KB
testcase_10 AC 64 ms
6,400 KB
testcase_11 AC 74 ms
6,784 KB
testcase_12 AC 61 ms
6,400 KB
testcase_13 AC 72 ms
6,400 KB
testcase_14 AC 3 ms
5,376 KB
testcase_15 AC 3 ms
5,376 KB
testcase_16 AC 2 ms
5,376 KB
testcase_17 AC 2 ms
5,376 KB
testcase_18 AC 2 ms
5,376 KB
testcase_19 AC 3 ms
5,376 KB
testcase_20 AC 2 ms
5,376 KB
testcase_21 AC 1 ms
5,376 KB
testcase_22 AC 1 ms
5,376 KB
testcase_23 AC 1 ms
5,376 KB
testcase_24 AC 1 ms
5,376 KB
testcase_25 AC 1 ms
5,376 KB
testcase_26 AC 1 ms
5,376 KB
testcase_27 AC 1 ms
5,376 KB
testcase_28 AC 24 ms
5,376 KB
testcase_29 AC 17 ms
5,376 KB
testcase_30 AC 16 ms
5,376 KB
testcase_31 AC 26 ms
5,376 KB
testcase_32 AC 25 ms
5,376 KB
testcase_33 AC 8 ms
5,376 KB
testcase_34 AC 20 ms
5,376 KB
testcase_35 AC 1 ms
5,376 KB
testcase_36 AC 1 ms
5,376 KB
testcase_37 AC 1 ms
5,376 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`
   --> src/main.rs:114:5
    |
114 | use std::io::Write;
    |     ^^^^^^^^^^^^^^
    |
    = note: `#[warn(unused_imports)]` on by default

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

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

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 run() {
    input! {
        n: usize,
        e: [(usize1, usize1, usize); n - 1],
    }
    const MOD: usize = 1_000_000_007;
    let mut ans = 0;
    for k in 0..30 {
        let mut dsu = DSU::new(n);
        for &(a, b, c) in e.iter() {
            if c >> k & 1 == 1 {
                dsu.unite(a, b);
            }
        }
        for i in 0..n {
            if i == dsu.root(i) {
                let size = dsu.size(i);
                ans += size * (size - 1) / 2 * (1 << k);
                ans %= MOD;
            }
        }
    }
    println!("{}", ans);
}

fn main() {
    run();
}
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