結果

問題 No.1054 Union add query
ユーザー kakikaki
提出日時 2020-05-16 14:34:55
言語 Rust
(1.77.0 + proconio)
結果
AC  
実行時間 482 ms / 2,000 ms
コード長 4,226 bytes
コンパイル時間 13,737 ms
コンパイル使用メモリ 400,436 KB
実行使用メモリ 9,736 KB
最終ジャッジ日時 2024-09-22 08:26:21
合計ジャッジ時間 16,614 ms
ジャッジサーバーID
(参考情報)
judge4 / judge2
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
6,812 KB
testcase_01 AC 1 ms
6,816 KB
testcase_02 AC 1 ms
6,940 KB
testcase_03 AC 364 ms
6,940 KB
testcase_04 AC 412 ms
9,736 KB
testcase_05 AC 342 ms
6,944 KB
testcase_06 AC 321 ms
6,940 KB
testcase_07 AC 290 ms
6,940 KB
testcase_08 AC 222 ms
6,940 KB
testcase_09 AC 482 ms
9,712 KB
testcase_10 AC 87 ms
6,940 KB
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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::*;

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()
    }
}

use std::mem::swap;

struct UnionFind {
    parents: Vec<i64>,
    val: Vec<i64>,
}

impl UnionFind {
    fn new(n: usize) -> Self {
        UnionFind {
            parents: vec![-1; n],
            val: vec![0; n],
        }
    }

    fn unite(&mut self, x: usize, y: usize) {
        let mut px = self.root(x);
        let mut py = self.root(y);
        if px == py {
            return;
        }
        if -self.parents[px] < -self.parents[py] {
            swap(&mut px, &mut py);
        }
        self.parents[px] += self.parents[py];
        self.parents[py] = px as i64;
        self.val[py] -= self.val[px];
    }

    fn root(&mut self, x: usize) -> usize {
        let px = self.parents[x];
        if px < 0 {
            return x;
        }
        self.root(px as usize)
    }

    fn add(&mut self, x: usize, v: i64) {
        let rx = self.root(x);
        self.val[rx] += v;
    }

    fn query(&self, x: usize) -> i64 {
        let mut ret = 0;
        let mut cur = x as i64;
        while self.parents[cur as usize] >= 0 {
            ret += self.val[cur as usize];
            cur = self.parents[cur as usize];
        }
        ret += self.val[cur as usize];
        ret
    }
}

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 Q: usize = sc.get();
    let mut uf = UnionFind::new(N);
    for _ in 0..Q {
        let T: usize = sc.get();
        match T {
            1 => {
                let A: usize = sc.get::<usize>()-1;
                let B: usize = sc.get::<usize>()-1;
                uf.unite(A, B);
            },
            2 => {
                let A: usize = sc.get::<usize>()-1;
                let B: i64 = sc.get();
                uf.add(A, B);
            },
            3 => {
                let A: usize = sc.get::<usize>()-1;
                let _: usize = sc.get();
                println!("{}", uf.query(A))
            }
            _ => panic!("error"),
        }
    }
}
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