結果
問題 | No.1254 補強への架け橋 |
ユーザー | cotton_fn_ |
提出日時 | 2020-10-09 22:07:54 |
言語 | Rust (1.72.1) |
結果 |
AC
|
実行時間 | 55 ms / 2,000 ms |
コード長 | 5,545 bytes |
コンパイル時間 | 2,717 ms |
コンパイル使用メモリ | 165,724 KB |
実行使用メモリ | 24,236 KB |
最終ジャッジ日時 | 2023-09-27 17:21:22 |
合計ジャッジ時間 | 11,124 ms |
ジャッジサーバーID (参考情報) |
judge12 / judge14 |
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
4,380 KB |
testcase_04 | AC | 1 ms
4,376 KB |
testcase_05 | AC | 1 ms
4,376 KB |
testcase_06 | AC | 2 ms
4,380 KB |
testcase_07 | AC | 1 ms
4,380 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
4,376 KB |
testcase_12 | AC | 1 ms
4,376 KB |
testcase_13 | AC | 1 ms
4,380 KB |
testcase_14 | AC | 1 ms
4,376 KB |
testcase_15 | AC | 2 ms
4,380 KB |
testcase_16 | AC | 1 ms
4,376 KB |
testcase_17 | AC | 1 ms
4,380 KB |
testcase_18 | AC | 1 ms
4,380 KB |
testcase_19 | AC | 1 ms
4,376 KB |
testcase_20 | AC | 1 ms
4,380 KB |
testcase_21 | AC | 1 ms
4,376 KB |
testcase_22 | AC | 1 ms
4,380 KB |
testcase_23 | AC | 1 ms
4,376 KB |
testcase_24 | AC | 1 ms
4,376 KB |
testcase_25 | AC | 1 ms
4,380 KB |
testcase_26 | AC | 1 ms
4,376 KB |
testcase_27 | AC | 1 ms
4,380 KB |
testcase_28 | AC | 1 ms
4,380 KB |
testcase_29 | AC | 1 ms
4,380 KB |
testcase_30 | AC | 1 ms
4,376 KB |
testcase_31 | AC | 1 ms
4,376 KB |
testcase_32 | AC | 1 ms
4,376 KB |
testcase_33 | AC | 1 ms
4,376 KB |
testcase_34 | AC | 1 ms
4,376 KB |
testcase_35 | AC | 2 ms
4,380 KB |
testcase_36 | AC | 1 ms
4,376 KB |
testcase_37 | AC | 1 ms
4,380 KB |
testcase_38 | AC | 1 ms
4,376 KB |
testcase_39 | AC | 1 ms
4,380 KB |
testcase_40 | AC | 1 ms
4,380 KB |
testcase_41 | AC | 1 ms
4,376 KB |
testcase_42 | AC | 1 ms
4,380 KB |
testcase_43 | AC | 1 ms
4,380 KB |
testcase_44 | AC | 1 ms
4,380 KB |
testcase_45 | AC | 1 ms
4,376 KB |
testcase_46 | AC | 1 ms
4,380 KB |
testcase_47 | AC | 1 ms
4,376 KB |
testcase_48 | AC | 1 ms
4,376 KB |
testcase_49 | AC | 1 ms
4,376 KB |
testcase_50 | AC | 1 ms
4,376 KB |
testcase_51 | AC | 1 ms
4,376 KB |
testcase_52 | AC | 1 ms
4,376 KB |
testcase_53 | AC | 1 ms
4,380 KB |
testcase_54 | AC | 1 ms
4,376 KB |
testcase_55 | AC | 1 ms
4,376 KB |
testcase_56 | AC | 1 ms
4,380 KB |
testcase_57 | AC | 2 ms
4,380 KB |
testcase_58 | AC | 1 ms
4,376 KB |
testcase_59 | AC | 1 ms
4,380 KB |
testcase_60 | AC | 1 ms
4,380 KB |
testcase_61 | AC | 1 ms
4,376 KB |
testcase_62 | AC | 1 ms
4,380 KB |
testcase_63 | AC | 4 ms
4,376 KB |
testcase_64 | AC | 2 ms
4,380 KB |
testcase_65 | AC | 3 ms
4,376 KB |
testcase_66 | AC | 3 ms
4,380 KB |
testcase_67 | AC | 2 ms
4,380 KB |
testcase_68 | AC | 3 ms
4,376 KB |
testcase_69 | AC | 4 ms
4,376 KB |
testcase_70 | AC | 2 ms
4,376 KB |
testcase_71 | AC | 2 ms
4,376 KB |
testcase_72 | AC | 3 ms
4,376 KB |
testcase_73 | AC | 2 ms
4,376 KB |
testcase_74 | AC | 4 ms
4,380 KB |
testcase_75 | AC | 3 ms
4,376 KB |
testcase_76 | AC | 2 ms
4,380 KB |
testcase_77 | AC | 2 ms
4,380 KB |
testcase_78 | AC | 4 ms
4,376 KB |
testcase_79 | AC | 4 ms
4,376 KB |
testcase_80 | AC | 3 ms
4,376 KB |
testcase_81 | AC | 4 ms
4,380 KB |
testcase_82 | AC | 4 ms
4,380 KB |
testcase_83 | AC | 38 ms
10,692 KB |
testcase_84 | AC | 37 ms
10,436 KB |
testcase_85 | AC | 22 ms
6,984 KB |
testcase_86 | AC | 29 ms
9,032 KB |
testcase_87 | AC | 35 ms
9,820 KB |
testcase_88 | AC | 5 ms
4,376 KB |
testcase_89 | AC | 37 ms
10,660 KB |
testcase_90 | AC | 23 ms
7,248 KB |
testcase_91 | AC | 18 ms
5,880 KB |
testcase_92 | AC | 10 ms
4,380 KB |
testcase_93 | AC | 30 ms
8,812 KB |
testcase_94 | AC | 26 ms
7,980 KB |
testcase_95 | AC | 27 ms
8,020 KB |
testcase_96 | AC | 35 ms
10,092 KB |
testcase_97 | AC | 15 ms
5,180 KB |
testcase_98 | AC | 35 ms
10,096 KB |
testcase_99 | AC | 20 ms
6,756 KB |
testcase_100 | AC | 36 ms
10,872 KB |
testcase_101 | AC | 8 ms
4,376 KB |
testcase_102 | AC | 5 ms
4,376 KB |
testcase_103 | AC | 10 ms
4,376 KB |
testcase_104 | AC | 13 ms
4,560 KB |
testcase_105 | AC | 29 ms
8,752 KB |
testcase_106 | AC | 16 ms
5,664 KB |
testcase_107 | AC | 37 ms
10,592 KB |
testcase_108 | AC | 38 ms
10,424 KB |
testcase_109 | AC | 29 ms
8,756 KB |
testcase_110 | AC | 26 ms
7,964 KB |
testcase_111 | AC | 28 ms
8,580 KB |
testcase_112 | AC | 12 ms
4,380 KB |
testcase_113 | AC | 24 ms
7,720 KB |
testcase_114 | AC | 16 ms
5,344 KB |
testcase_115 | AC | 6 ms
4,380 KB |
testcase_116 | AC | 18 ms
6,148 KB |
testcase_117 | AC | 13 ms
4,380 KB |
testcase_118 | AC | 33 ms
10,140 KB |
testcase_119 | AC | 20 ms
6,716 KB |
testcase_120 | AC | 33 ms
9,816 KB |
testcase_121 | AC | 11 ms
4,376 KB |
testcase_122 | AC | 18 ms
6,152 KB |
testcase_123 | AC | 1 ms
4,376 KB |
testcase_124 | AC | 54 ms
23,996 KB |
testcase_125 | AC | 55 ms
24,236 KB |
ソースコード
#![allow(unused_imports, unused_macros)] use kyoproio::*; use std::{ collections::*, io::{self, prelude::*}, iter, mem::{replace, swap}, }; fn main() -> io::Result<()> { std::thread::Builder::new() .stack_size(64 * 1024 * 1024) .spawn(|| { let stdin = io::stdin(); let stdout = io::stdout(); run(KInput::new(stdin.lock()), io::BufWriter::new(stdout.lock())) })? .join() .unwrap() } fn run<I: Input, O: Write>(mut kin: I, mut out: O) -> io::Result<()> { macro_rules! output { ($($args:expr),+) => { write!(&mut out, $($args),+)?; }; } macro_rules! outputln { ($($args:expr),+) => { output!($($args),+); outputln!(); }; () => { output!("\n"); if cfg!(debug_assertions) { out.flush()?; } } } let n: usize = kin.input(); let es: Vec<(usize, usize)> = kin.seq(n); let mut g = vec![Vec::new(); n + 1]; for &(u, v) in &es { g[u].push(v); g[v].push(u); } let ll = LowLink::new(&g); let mut ans = Vec::new(); for i in 0..n { let (u, v) = es[i]; if !ll.is_bridge(u, v) { ans.push(i + 1); } } outputln!("{}", ans.len()); for i in ans { output!("{} ", i); } outputln!(); Ok(()) } #[derive(Debug)] pub struct LowLink<'a> { g: &'a [Vec<usize>], ord: Vec<usize>, low: Vec<usize>, } impl<'a> LowLink<'a> { pub fn new(g: &'a [Vec<usize>]) -> Self { let mut ll = Self { g, ord: vec![!0; g.len()], low: vec![!0; g.len()], }; let mut id = 0; for u in 0..g.len() { if ll.ord[u] == !0 { ll.dfs(u, !0, &mut id); } } ll } fn dfs(&mut self, u: usize, p: usize, id: &mut usize) { self.ord[u] = *id; self.low[u] = *id; *id += 1; for &v in self.g[u].iter().filter(|&&v| v != p) { if self.ord[v] == !0 { self.dfs(v, u, id); } self.low[u] = self.low[u].min(self.low[v]); } } pub fn graph(&self) -> &[Vec<usize>] { &self.g } pub fn is_bridge(&self, mut u: usize, mut v: usize) -> bool { if self.ord[u] > self.ord[v] { swap(&mut u, &mut v) } self.ord[u] < self.low[v] } } // ----------------------------------------------------------------------------- pub mod kyoproio { use std::io::prelude::*; pub trait Input { fn str(&mut self) -> &str; fn input<T: InputParse>(&mut self) -> T { T::input(self) } fn iter<T: InputParse>(&mut self) -> Iter<T, Self> { Iter(self, std::marker::PhantomData) } fn seq<T: InputParse, B: std::iter::FromIterator<T>>(&mut self, n: usize) -> B { self.iter().take(n).collect() } } pub struct KInput<R> { src: R, buf: String, pos: usize, } impl<R: BufRead> KInput<R> { pub fn new(src: R) -> Self { Self { src, buf: String::with_capacity(1024), pos: 0, } } } impl<R: BufRead> Input for KInput<R> { fn str(&mut self) -> &str { loop { if self.pos >= self.buf.len() { self.pos = 0; self.buf.clear(); if self.src.read_line(&mut self.buf).expect("io error") == 0 { return &self.buf; } } let range = self.pos ..self.buf[self.pos..] .find(|c: char| c.is_ascii_whitespace()) .map(|i| i + self.pos) .unwrap_or_else(|| self.buf.len()); self.pos = range.end + 1; if range.end > range.start { return &self.buf[range]; } } } } pub struct Iter<'a, T, I: ?Sized>(&'a mut I, std::marker::PhantomData<*const T>); impl<'a, T: InputParse, I: Input + ?Sized> Iterator for Iter<'a, T, I> { type Item = T; fn next(&mut self) -> Option<T> { Some(self.0.input()) } } pub trait InputParse: Sized { fn input<I: Input + ?Sized>(src: &mut I) -> Self; } impl InputParse for Vec<u8> { fn input<I: Input + ?Sized>(src: &mut I) -> Self { src.str().as_bytes().to_owned() } } macro_rules! from_str_impl { { $($T:ty)* } => { $(impl InputParse for $T { fn input<I: Input + ?Sized>(src: &mut I) -> Self { src.str().parse::<$T>().expect("parse error") } })* } } from_str_impl! { String char bool f32 f64 isize i8 i16 i32 i64 i128 usize u8 u16 u32 u64 u128 } macro_rules! tuple_impl { ($H:ident $($T:ident)*) => { impl<$H: InputParse, $($T: InputParse),*> InputParse for ($H, $($T),*) { fn input<I: Input + ?Sized>(src: &mut I) -> Self { ($H::input(src), $($T::input(src)),*) } } tuple_impl!($($T)*); }; () => {} } tuple_impl!(A B C D E F G); #[macro_export] macro_rules! kdbg { ($($v:expr),*) => { if cfg!(debug_assertions) { dbg!($($v),*) } else { ($($v),*) } } } }