結果

問題 No.2337 Equidistant
ユーザー 37kt37kt
提出日時 2023-12-15 13:08:09
言語 Rust
(1.77.0 + proconio)
結果
CE  
(最新)
AC  
(最初)
実行時間 -
コード長 31,920 bytes
コンパイル時間 13,621 ms
コンパイル使用メモリ 377,432 KB
最終ジャッジ日時 2024-11-20 02:40:26
合計ジャッジ時間 17,180 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge1
このコードへのチャレンジ
（要ログイン）
コンパイルエラー時のメッセージ・ソースコードは、提出者また管理者しか表示できないようにしております。（リジャッジ後のコンパイルエラーは公開されます）
ただし、clay言語の場合は開発者のデバッグのため、公開されます。

コンパイルメッセージ
error[E0659]: `proconio` is ambiguous
 --> src/main.rs:7:5
  |
7 | use proconio::{
  |     ^^^^^^^^ ambiguous name
  |
  = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
  = note: `proconio` could refer to a crate passed with `--extern`
  = help: use `::proconio` to refer to this crate unambiguously
note: `proconio` could also refer to the module imported here
 --> src/main.rs:1:9
  |
1 | pub use __cargo_equip::prelude::*;
  |         ^^^^^^^^^^^^^^^^^^^^^^^^^
  = help: consider adding an explicit import of `proconio` to disambiguate
  = help: or use `crate::proconio` to refer to this module unambiguously

For more information about this error, try `rustc --explain E0659`.
error: could not compile `main` (bin "main") due to 1 previous error

ソースコード

diff # 

pub use __cargo_equip::prelude::*;

use algebraic::{act, algebra, monoid};
use graph::Graph;
use heavy_light_decomposition::HeavyLightDecomposition;
#[allow(unused_imports)]
use proconio::{
    input,
    marker::{Bytes, Chars, Usize1},
};
use re_rooting_dp::ReRootingDP;

algebra!(M, usize);
monoid!(M, 0, |a, b| a + b);
algebra!(V, ());
act!(V, usize, |_, &x| x + 1);
algebra!(E, ());
act!(E, usize, |_, &x| x);

fn main() {
    input! {
        n: usize,
        q: usize,
    }
    let mut g = Graph::<(), ()>::new(n);
    for _ in 0..n - 1 {
        input! {
            a: Usize1,
            b: Usize1,
        }
        g.add_edge(a, b, ());
        g.add_edge(b, a, ());
    }
    let hld = HeavyLightDecomposition::new(&g);
    let dp = ReRootingDP::build::<M, V, E>(&g);
    for _ in 0..q {
        input! {
            u: Usize1,
            v: Usize1,
        }
        let d = hld.dist(u, v);
        if d % 2 != 0 {
            println!("0");
            continue;
        }
        let w = hld.jump(u, v, d / 2);
        let mut s = dp.prod(w);
        let x = hld.jump(w, u, 1);
        let y = hld.jump(w, v, 1);
        s -= dp.prod_subtree(x, w);
        s -= dp.prod_subtree(y, w);
        println!("{}", s);
    }
}

// The following code was expanded by `cargo-equip`.

///  # Bundled libraries
/// 
///  - `algebraic 0.1.0 (path+████████████████████████████████████████████████████████)`                                      published in **missing** licensed under `CC0-1.0`           as `crate::__cargo_equip::crates::algebraic`
///  - `graph 0.1.0 (path+████████████████████████████████████████████████)`                                                  published in **missing** licensed under `CC0-1.0`           as `crate::__cargo_equip::crates::graph`
///  - `heavy-light-decomposition 0.1.0 (path+█████████████████████████████████████████████████████████████████████████████)` published in **missing** licensed under `CC0-1.0`           as `crate::__cargo_equip::crates::heavy_light_decomposition`
///  - `lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)`                                                                     licensed under `MIT/Apache-2.0`    as `crate::__cargo_equip::crates::__lazy_static_1_4_0`
///  - `proconio 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)`                                                                        licensed under `MIT OR Apache-2.0` as `crate::__cargo_equip::crates::proconio`
///  - `re-rooting-dp 0.1.0 (path+███████████████████████████████████████████████████████)`                                   published in **missing** licensed under `CC0-1.0`           as `crate::__cargo_equip::crates::re_rooting_dp`
/// 
///  # Procedural macros
/// 
///  - `proconio-derive 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)` licensed under `MIT OR Apache-2.0`
/// 
///  # License and Copyright Notices
/// 
///  - `lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)`
/// 
///      ```text
///      Copyright (c) 2010 The Rust Project Developers
/// 
///      Permission is hereby granted, free of charge, to any
///      person obtaining a copy of this software and associated
///      documentation files (the "Software"), to deal in the
///      Software without restriction, including without
///      limitation the rights to use, copy, modify, merge,
///      publish, distribute, sublicense, and/or sell copies of
///      the Software, and to permit persons to whom the Software
///      is furnished to do so, subject to the following
///      conditions:
/// 
///      The above copyright notice and this permission notice
///      shall be included in all copies or substantial portions
///      of the Software.
/// 
///      THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
///      ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
///      TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
///      PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
///      SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
///      CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
///      OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
///      IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
///      DEALINGS IN THE SOFTWARE.
///      ```
/// 
///  - `proconio 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)`
/// 
///      ```text
///      The MIT License
///      Copyright 2019 (C) statiolake <statiolake@gmail.com>
/// 
///      Permission is hereby granted, free of charge, to any person obtaining a copy of
///      this software and associated documentation files (the "Software"), to deal in
///      the Software without restriction, including without limitation the rights to
///      use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
///      the Software, and to permit persons to whom the Software is furnished to do so,
///      subject to the following conditions:
/// 
///      The above copyright notice and this permission notice shall be included in all
///      copies or substantial portions of the Software.
/// 
///      THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
///      IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
///      FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
///      COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
///      IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
///      CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
/// 
///      Copyright for original `input!` macro is held by Hideyuki Tanaka, 2019.  The
///      original macro is licensed under BSD 3-clause license.
/// 
///      Redistribution and use in source and binary forms, with or without
///      modification, are permitted provided that the following conditions are met:
/// 
///      1. Redistributions of source code must retain the above copyright notice, this
///         list of conditions and the following disclaimer.
/// 
///      2. Redistributions in binary form must reproduce the above copyright notice,
///         this list of conditions and the following disclaimer in the documentation
///         and/or other materials provided with the distribution.
/// 
///      3. Neither the name of the copyright holder nor the names of its contributors
///         may be used to endorse or promote products derived from this software
///         without specific prior written permission.
/// 
///      THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
///      ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
///      WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
///      DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
///      FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
///      DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
///      SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
///      CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
///      OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
///      OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
///      ```
#[cfg_attr(any(), rustfmt::skip)]
#[allow(unused)]
mod __cargo_equip {
    pub(crate) mod crates {
        pub mod algebraic {pub use crate::__cargo_equip::macros::algebraic::*;pub trait Algebra{type S;}pub trait Act:Algebra{type X;fn act(f:&Self::S,x:&Self::X)->Self::X;}pub trait Monoid:Algebra{fn e()->Self::S;fn op(x:&Self::S,y:&Self::S)->Self::S;}pub trait Group:Monoid{fn inv(x:&Self::S)->Self::S;}#[macro_export]macro_rules!__cargo_equip_macro_def_algebraic_algebra{($ident:ident,$ty:ty)=>{#[derive(Clone)]enum$ident{}impl$crate::__cargo_equip::crates::algebraic::Algebra for$ident{type S=$ty;}};}macro_rules!algebra{($($tt:tt)*)=>(crate::__cargo_equip_macro_def_algebraic_algebra!{$($tt)*})}#[macro_export]macro_rules!__cargo_equip_macro_def_algebraic_act{($ident:ident,$tar:ty,$act:expr)=>{impl$crate::__cargo_equip::crates::algebraic::Act for$ident{type X=$tar;#[inline]fn act(f:&Self::S,x:&Self::X)->Self::X{$act(f,x)}}};}macro_rules!act{($($tt:tt)*)=>(crate::__cargo_equip_macro_def_algebraic_act!{$($tt)*})}#[macro_export]macro_rules!__cargo_equip_macro_def_algebraic_monoid{($ident:ident,$e:expr,$op:expr)=>{impl$crate::__cargo_equip::crates::algebraic::Monoid for$ident{#[inline]fn e()->Self::S{$e}#[inline]fn op(x:&Self::S,y:&Self::S)->Self::S{$op(x,y)}}};}macro_rules!monoid{($($tt:tt)*)=>(crate::__cargo_equip_macro_def_algebraic_monoid!{$($tt)*})}#[macro_export]macro_rules!__cargo_equip_macro_def_algebraic_group{($ident:ident,$e:expr,$op:expr,$inv:expr)=>{impl$crate::__cargo_equip::crates::algebraic::Monoid for$ident{#[inline]fn e()->Self::S{$e}#[inline]fn op(x:&Self::S,y:&Self::S)->Self::S{$op(x,y)}}impl$crate::__cargo_equip::crates::algebraic::Group for$ident{#[inline]fn inv(x:&Self::S)->Self::S{$inv(x)}}};}macro_rules!group{($($tt:tt)*)=>(crate::__cargo_equip_macro_def_algebraic_group!{$($tt)*})}}
        pub mod graph {#[derive(Clone)]pub struct Graph<V,E>where V:Clone,E:Clone,{vertices:Vec<V>,head:Vec<usize>,next:Vec<usize>,edges:Vec<(usize,E)>,}pub const GRID_NEIGHBOURS_4:&[(usize,usize)]=&[(!0,0),(0,!0),(1,0),(0,1)];pub const GRID_NEIGHBOURS_8:&[(usize,usize)]=&[(!0,0),(0,!0),(1,0),(0,1),(!0,!0),(!0,1),(1,!0),(1,1),];impl<V,E>Graph<V,E>where V:Clone+Default,E:Clone,{pub fn new(n:usize)->Self{Self{vertices:vec![Default::default();n],head:vec![!0;n],next:vec![],edges:vec![],}}}impl<V,E>From<Vec<V>>for Graph<V,E>where V:Clone,E:Clone,{fn from(vertices:Vec<V>)->Self{Self{head:vec![!0;vertices.len()],vertices,next:vec![],edges:vec![],}}}impl<V,E>Graph<V,E>where V:Clone,E:Clone,{pub fn size(&self)->usize{self.vertices.len()}pub fn set_vertex(&mut self,v:usize,w:V){self.vertices[v]=w;}pub fn add_vertex(&mut self,w:V)->usize{self.vertices.push(w);self.head.push(!0);self.vertices.len()-1}pub fn add_edge(&mut self,u:usize,v:usize,w:E){self.next.push(self.head[u]);self.head[u]=self.edges.len();self.edges.push((v,w));}pub fn add_undirected_edge(&mut self,u:usize,v:usize,w:E){self.add_edge(u,v,w.clone());self.add_edge(v,u,w);}pub fn vertices(&self)->&[V]{&self.vertices}pub fn out_edges(&self,v:usize)->impl Iterator<Item=&(usize,E)>{let mut e=self.head[v];std::iter::from_fn(move||{if e!=!0{let res=&self.edges[e];e=self.next[e];Some(res)}else{None}})}pub fn from_grid(grid:&Vec<Vec<V>>,neighbours:&[(usize,usize)],cost:impl Fn(&V,&V)->Option<E>,)->Self{let h=grid.len();let w=grid[0].len();let mut g=Self::from(grid.into_iter().flatten().cloned().collect::<Vec<_>>());for i in 0..h{for j in 0..w{for&(di,dj)in neighbours{let ni=i.wrapping_add(di);let nj=j.wrapping_add(dj);if ni>=h||nj>=w{continue;}if let Some(c)=cost(&grid[i][j],&grid[ni][nj]){g.add_edge(i*w+j,ni*w+nj,c);}}}}g}}}
        pub mod heavy_light_decomposition {use crate::__cargo_equip::preludes::heavy_light_decomposition::*;use graph::Graph;use std::mem::swap;pub struct HeavyLightDecomposition{t_in:Vec<usize>,t_out:Vec<usize>,ord:Vec<usize>,size:Vec<usize>,heavy:Vec<usize>,head:Vec<usize>,par:Vec<usize>,depth:Vec<usize>,}impl HeavyLightDecomposition{pub fn new<V,E>(g:&Graph<V,E>)->Self where V:Clone,E:Clone,{let n=g.size();let mut hld=HeavyLightDecomposition{t_in:vec![0;n],t_out:vec![0;n],ord:vec![],size:vec![0;n],heavy:vec![!0;n],head:vec![0;n],par:vec![!0;n],depth:vec![0;n],};hld.dfs_sz(g,0);hld.dfs_hld(g,0,&mut 0);hld}fn dfs_sz<V,E>(&mut self,g:&Graph<V,E>,v:usize)where V:Clone,E:Clone,{self.size[v]=1;for&(u,_)in g.out_edges(v){if u==self.par[v]{continue;}self.par[u]=v;self.depth[u]=self.depth[v]+1;self.dfs_sz(g,u);self.size[v]+=self.size[u];if self.heavy[v]==!0||self.size[u]>self.size[self.heavy[v]]{self.heavy[v]=u;}}}fn dfs_hld<V,E>(&mut self,g:&Graph<V,E>,v:usize,t:&mut usize)where V:Clone,E:Clone,{self.t_in[v]=*t;self.ord.push(v);*t+=1;if self.heavy[v]!=!0{let u=self.heavy[v];self.head[u]=self.head[v];self.dfs_hld(g,u,t);}for&(u,_)in g.out_edges(v){if u==self.par[v]{continue;}if u==self.heavy[v]{continue;}self.head[u]=u;self.dfs_hld(g,u,t);}self.t_out[v]=*t;}}impl HeavyLightDecomposition{pub fn kth_ancestor(&self,mut v:usize,mut k:usize)->usize{if self.depth[v]<k{return!0;}loop{let u=self.head[v];if self.t_in[v]-k>=self.t_in[u]{return self.ord[self.t_in[v]-k];}k-=1+self.t_in[v]-self.t_in[u];v=self.par[u];}}pub fn lca(&self,mut u:usize,mut v:usize)->usize{loop{if self.t_in[u]>self.t_in[v]{swap(&mut u,&mut v);}if self.head[u]==self.head[v]{return u;}v=self.par[self.head[v]];}}pub fn dist(&self,u:usize,v:usize)->usize{let l=self.lca(u,v);self.depth[u]+self.depth[v]-self.depth[l]*2}pub fn jump(&self,u:usize,v:usize,k:usize)->usize{if k==0{return u;}let l=self.lca(u,v);let d_lu=self.depth[u]-self.depth[l];let d_lv=self.depth[v]-self.depth[l];if k>d_lu+d_lv{!0}else if k<=d_lu{self.kth_ancestor(u,k)}else{self.kth_ancestor(v,d_lu+d_lv-k)}}pub fn vertex(&self,v:usize)->usize{self.t_in[v]}pub fn edge(&self,u:usize,v:usize)->usize{if self.depth[u]<self.depth[v]{self.t_in[v]}else{self.t_in[u]}}pub fn path(&self,mut u:usize,mut v:usize,edge:bool,)->(Vec<(usize,usize)>,Vec<(usize,usize)>){let mut up=vec![];let mut down=vec![];let e=if edge{1}else{0};while self.head[u]!=self.head[v]{if self.t_in[u]<self.t_in[v]{down.push((self.t_in[self.head[v]],self.t_in[v]+1));v=self.par[self.head[v]];}else{up.push((self.t_in[self.head[u]],self.t_in[u]+1));u=self.par[self.head[u]];}}if self.t_in[u]<self.t_in[v]{down.push((self.t_in[u]+e,self.t_in[v]+1));}else if self.t_in[u]>=self.t_in[v]+e{up.push((self.t_in[v]+e,self.t_in[u]+1));}down.reverse();(up,down)}pub fn subtree(&self,v:usize,edge:bool)->(usize,usize){let e=if edge{1}else{0};(self.t_in[v]+e,self.t_out[v])}}}
        pub mod __lazy_static_1_4_0 {#![no_std]use crate::__cargo_equip::preludes::__lazy_static_1_4_0::*;pub use crate::__cargo_equip::macros::__lazy_static_1_4_0::*;#[path="inline_lazy.rs"]pub mod lazy{use crate::__cargo_equip::preludes::__lazy_static_1_4_0::*;extern crate core;extern crate std;use self::std::prelude::v1::*;use self::std::cell::Cell;use self::std::hint::unreachable_unchecked;use self::std::sync::Once;#[allow(deprecated)]pub use self::std::sync::ONCE_INIT;pub struct Lazy<T:Sync>(Cell<Option<T>>,Once);impl<T:Sync>Lazy<T>{#[allow(deprecated)]pub const INIT:Self=Lazy(Cell::new(None),ONCE_INIT);#[inline(always)]pub fn get<F>(&'static self,f:F)->&T where F:FnOnce()->T,{self.1.call_once(||{self.0.set(Some(f()));});unsafe{match*self.0.as_ptr(){Some(ref x)=>x,None=>{debug_assert!(false,"attempted to derefence an uninitialized lazy static. This is a bug");unreachable_unchecked()},}}}}unsafe impl<T:Sync>Sync for Lazy<T>{}#[macro_export]macro_rules!__cargo_equip_macro_def___lazy_static_1_4_0___lazy_static_create{($NAME:ident,$T:ty)=>{static$NAME:$crate::__cargo_equip::crates::__lazy_static_1_4_0::lazy::Lazy<$T> =$crate::__cargo_equip::crates::__lazy_static_1_4_0::lazy::Lazy::INIT;};}macro_rules!__lazy_static_create{($($tt:tt)*)=>(crate::__cargo_equip_macro_def___lazy_static_1_4_0___lazy_static_create!{$($tt)*})}}pub use core::ops::Deref as __Deref;#[macro_export(local_inner_macros)]macro_rules!__cargo_equip_macro_def___lazy_static_1_4_0___lazy_static_internal{($(#[$attr:meta])*($($vis:tt)*)static ref$N:ident:$T:ty=$e:expr;$($t:tt)*)=>{__lazy_static_internal!(@MAKE TY,$(#[$attr])*,($($vis)*),$N);__lazy_static_internal!(@TAIL,$N:$T=$e);lazy_static!($($t)*);};(@TAIL,$N:ident:$T:ty=$e:expr)=>{impl$crate::__cargo_equip::crates::__lazy_static_1_4_0::__Deref for$N{type Target=$T;fn deref(&self)->&$T{#[inline(always)]fn __static_ref_initialize()->$T{$e}#[inline(always)]fn __stability()->&'static$T{__lazy_static_create!(LAZY,$T);LAZY.get(__static_ref_initialize)}__stability()}}impl$crate::__cargo_equip::crates::__lazy_static_1_4_0::LazyStatic for$N{fn initialize(lazy:&Self){let _=&**lazy;}}};(@MAKE TY,$(#[$attr:meta])*,($($vis:tt)*),$N:ident)=>{#[allow(missing_copy_implementations)]#[allow(non_camel_case_types)]#[allow(dead_code)]$(#[$attr])*$($vis)*struct$N{__private_field:()}#[doc(hidden)]$($vis)*static$N:$N=$N{__private_field:()};};()=>()}macro_rules!__lazy_static_internal{($($tt:tt)*)=>(crate::__cargo_equip_macro_def___lazy_static_1_4_0___lazy_static_internal!{$($tt)*})}#[macro_export(local_inner_macros)]macro_rules!__cargo_equip_macro_def___lazy_static_1_4_0_lazy_static{($(#[$attr:meta])*static ref$N:ident:$T:ty=$e:expr;$($t:tt)*)=>{__lazy_static_internal!($(#[$attr])*()static ref$N:$T=$e;$($t)*);};($(#[$attr:meta])*pub static ref$N:ident:$T:ty=$e:expr;$($t:tt)*)=>{__lazy_static_internal!($(#[$attr])*(pub)static ref$N:$T=$e;$($t)*);};($(#[$attr:meta])*pub($($vis:tt)+)static ref$N:ident:$T:ty=$e:expr;$($t:tt)*)=>{__lazy_static_internal!($(#[$attr])*(pub($($vis)+))static ref$N:$T=$e;$($t)*);};()=>()}macro_rules!lazy_static{($($tt:tt)*)=>(crate::__cargo_equip_macro_def___lazy_static_1_4_0_lazy_static!{$($tt)*})}pub trait LazyStatic{fn initialize(lazy:&Self);}pub fn initialize<T:LazyStatic>(lazy:&T){LazyStatic::initialize(lazy);}}
        pub mod proconio {#![allow(clippy::needless_doctest_main,clippy::print_literal)]use crate::__cargo_equip::preludes::proconio::*;pub use crate::__cargo_equip::macros::proconio::*;pub use proconio_derive::*;pub mod marker{use crate::__cargo_equip::preludes::proconio::*;use crate::__cargo_equip::crates::proconio::source::{Readable,Source};use std::io::BufRead;pub enum Chars{}impl Readable for Chars{type Output=Vec<char>;fn read<R:BufRead,S:Source<R>>(source:&mut S)->Vec<char>{source.next_token_unwrap().chars().collect()}}pub enum Bytes{}impl Readable for Bytes{type Output=Vec<u8>;fn read<R:BufRead,S:Source<R>>(source:&mut S)->Vec<u8>{source.next_token_unwrap().bytes().collect()}}pub enum Usize1{}impl Readable for Usize1{type Output=usize;fn read<R:BufRead,S:Source<R>>(source:&mut S)->usize{usize::read(source).checked_sub(1).expect("attempted to read the value 0 as a Usize1")}}pub enum Isize1{}impl Readable for Isize1{type Output=isize;fn read<R:BufRead,S:Source<R>>(source:&mut S)->isize{isize::read(source).checked_sub(1).unwrap_or_else(||{panic!(concat!("attempted to read the value {} as a Isize1:"," the value is isize::MIN and cannot be decremented"),std::isize::MIN,)})}}}pub mod source{use crate::__cargo_equip::preludes::proconio::*;use std::any::type_name;use std::fmt::Debug;use std::io::BufRead;use std::str::FromStr;pub mod line{use crate::__cargo_equip::preludes::proconio::*;use super::Source;use std::io::BufRead;use std::iter::Peekable;use std::str::SplitWhitespace;pub struct LineSource<R:BufRead>{tokens:Peekable<SplitWhitespace<'static>>,current_context:Box<str>,reader:R,}impl<R:BufRead>LineSource<R>{pub fn new(reader:R)->LineSource<R>{LineSource{current_context:"".to_string().into_boxed_str(),tokens:"".split_whitespace().peekable(),reader,}}fn prepare(&mut self){while self.tokens.peek().is_none(){let mut line=String::new();let num_bytes=self.reader.read_line(&mut line).expect("failed to get linel maybe an IO error.");if num_bytes==0{return;}self.current_context=line.into_boxed_str();self.tokens=unsafe{std::mem::transmute::<_,&'static str>(&*self.current_context)}.split_whitespace().peekable();}}}impl<R:BufRead>Source<R>for LineSource<R>{fn next_token(&mut self)->Option<&str>{self.prepare();self.tokens.next()}fn is_empty(&mut self)->bool{self.prepare();self.tokens.peek().is_none()}}use std::io::BufReader;impl<'a>From<&'a str>for LineSource<BufReader<&'a[u8]>>{fn from(s:&'a str)->LineSource<BufReader<&'a[u8]>>{LineSource::new(BufReader::new(s.as_bytes()))}}}pub mod once{use crate::__cargo_equip::preludes::proconio::*;use super::Source;use std::io::BufRead;use std::iter::Peekable;use std::marker::PhantomData;use std::str::SplitWhitespace;pub struct OnceSource<R:BufRead>{tokens:Peekable<SplitWhitespace<'static>>,context:Box<str>,_read:PhantomData<R>,}impl<R:BufRead>OnceSource<R>{pub fn new(mut source:R)->OnceSource<R>{let mut context=String::new();source.read_to_string(&mut context).expect("failed to read from source; maybe an IO error.");let context=context.into_boxed_str();let mut res=OnceSource{context,tokens:"".split_whitespace().peekable(),_read:PhantomData,};use std::mem;let context:&'static str=unsafe{mem::transmute(&*res.context)};res.tokens=context.split_whitespace().peekable();res}}impl<R:BufRead>Source<R>for OnceSource<R>{fn next_token(&mut self)->Option<&str>{self.tokens.next()}fn is_empty(&mut self)->bool{self.tokens.peek().is_none()}}use std::io::BufReader;impl<'a>From<&'a str>for OnceSource<BufReader<&'a[u8]>>{fn from(s:&'a str)->OnceSource<BufReader<&'a[u8]>>{OnceSource::new(BufReader::new(s.as_bytes()))}}}pub mod auto{use crate::__cargo_equip::preludes::proconio::*;#[cfg(debug_assertions)]pub use super::line::LineSource as AutoSource;#[cfg(not(debug_assertions))]pub use super::once::OnceSource as AutoSource;}pub trait Source<R:BufRead>{fn next_token(&mut self)->Option<&str>;fn is_empty(&mut self)->bool;fn next_token_unwrap(&mut self)->&str{self.next_token().expect(concat!("failed to get the next token; ","maybe reader reached an end of input. ","ensure that arguments for `input!` macro is correctly ","specified to match the problem input."))}}impl<R:BufRead,S:Source<R>>Source<R>for&'_ mut S{fn next_token(&mut self)->Option<&str>{(*self).next_token()}fn is_empty(&mut self)->bool{(*self).is_empty()}}pub trait Readable{type Output;fn read<R:BufRead,S:Source<R>>(source:&mut S)->Self::Output;}impl<T:FromStr>Readable for T where T::Err:Debug,{type Output=T;fn read<R:BufRead,S:Source<R>>(source:&mut S)->T{let token=source.next_token_unwrap();match token.parse(){Ok(v)=>v,Err(e)=>panic!(concat!("failed to parse the input `{input}` ","to the value of type `{ty}`: {err:?}; ","ensure that the input format is collectly specified ","and that the input value must handle specified type.",),input=token,ty=type_name::<T>(),err=e,),}}}}use crate::__cargo_equip::crates::proconio::source::auto::AutoSource;use lazy_static::lazy_static;use std::io;use std::io::{BufReader,Stdin};use std::sync::Mutex;pub use crate::__cargo_equip::crates::proconio::source::Readable as __Readable;lazy_static!{#[doc(hidden)]pub static ref STDIN_SOURCE:Mutex<AutoSource<BufReader<Stdin>>>=Mutex::new(AutoSource::new(BufReader::new(io::stdin())));}#[macro_export]macro_rules!__cargo_equip_macro_def_proconio_input{(@from[$source:expr]@rest)=>{};(@from[$source:expr]@rest mut$($rest:tt)*)=>{$crate::__cargo_equip::crates::proconio::input!{@from[$source]@mut[mut]@rest$($rest)*}};(@from[$source:expr]@rest$($rest:tt)*)=>{$crate::__cargo_equip::crates::proconio::input!{@from[$source]@mut[]@rest$($rest)*}};(@from[$source:expr]@mut[$($mut:tt)?]@rest$var:tt:$($rest:tt)*)=>{$crate::__cargo_equip::crates::proconio::input!{@from[$source]@mut[$($mut)*]@var$var@kind[]@rest$($rest)*}};(@from[$source:expr]@mut[$($mut:tt)?]@var$var:tt@kind[$($kind:tt)*]@rest)=>{let$($mut)*$var=$crate::__cargo_equip::crates::proconio::read_value!(@source[$source]@kind[$($kind)*]);};(@from[$source:expr]@mut[$($mut:tt)?]@var$var:tt@kind[$($kind:tt)*]@rest,$($rest:tt)*)=>{$crate::__cargo_equip::crates::proconio::input!(@from[$source]@mut[$($mut)*]@var$var@kind[$($kind)*]@rest);$crate::__cargo_equip::crates::proconio::input!(@from[$source]@rest$($rest)*);};(@from[$source:expr]@mut[$($mut:tt)?]@var$var:tt@kind[$($kind:tt)*]@rest$tt:tt$($rest:tt)*)=>{$crate::__cargo_equip::crates::proconio::input!(@from[$source]@mut[$($mut)*]@var$var@kind[$($kind)*$tt]@rest$($rest)*);};(from$source:expr,$($rest:tt)*)=>{#[allow(unused_variables,unused_mut)]let mut s=$source;$crate::__cargo_equip::crates::proconio::input!{@from[&mut s]@rest$($rest)*}};($($rest:tt)*)=>{let mut locked_stdin=$crate::__cargo_equip::crates::proconio::STDIN_SOURCE.lock().expect(concat!("failed to lock the stdin; please re-run this program.  ","If this issue repeatedly occur, this is a bug in `proconio`.  ","Please report this issue from ","<https://github.com/statiolake/proconio-rs/issues>."));$crate::__cargo_equip::crates::proconio::input!{@from[&mut*locked_stdin]@rest$($rest)*}drop(locked_stdin);};}macro_rules!input{($($tt:tt)*)=>(crate::__cargo_equip_macro_def_proconio_input!{$($tt)*})}#[macro_export]macro_rules!__cargo_equip_macro_def_proconio_read_value{(@source[$source:expr]@kind[[$($kind:tt)*]])=>{$crate::__cargo_equip::crates::proconio::read_value!(@array@source[$source]@kind[]@rest$($kind)*)};(@array@source[$source:expr]@kind[$($kind:tt)*]@rest)=>{{let len=<usize as$crate::__cargo_equip::crates::proconio::__Readable>::read($source);$crate::__cargo_equip::crates::proconio::read_value!(@source[$source]@kind[[$($kind)*;len]])}};(@array@source[$source:expr]@kind[$($kind:tt)*]@rest;$($rest:tt)*)=>{$crate::__cargo_equip::crates::proconio::read_value!(@array@source[$source]@kind[$($kind)*]@len[$($rest)*])};(@array@source[$source:expr]@kind[$($kind:tt)*]@rest$tt:tt$($rest:tt)*)=>{$crate::__cargo_equip::crates::proconio::read_value!(@array@source[$source]@kind[$($kind)*$tt]@rest$($rest)*)};(@array@source[$source:expr]@kind[$($kind:tt)*]@len[$($len:tt)*])=>{{let len=$($len)*;(0..len).map(|_|$crate::__cargo_equip::crates::proconio::read_value!(@source[$source]@kind[$($kind)*])).collect::<Vec<_>>()}};(@source[$source:expr]@kind[($($kinds:tt)*)])=>{$crate::__cargo_equip::crates::proconio::read_value!(@tuple@source[$source]@kinds[]@current[]@rest$($kinds)*)};(@tuple@source[$source:expr]@kinds[$([$($kind:tt)*])*]@current[]@rest)=>{($($crate::__cargo_equip::crates::proconio::read_value!(@source[$source]@kind[$($kind)*]),)*)};(@tuple@source[$source:expr]@kinds[$($kinds:tt)*]@current[$($curr:tt)*]@rest)=>{$crate::__cargo_equip::crates::proconio::read_value!(@tuple@source[$source]@kinds[$($kinds)*[$($curr)*]]@current[]@rest)};(@tuple@source[$source:expr]@kinds[$($kinds:tt)*]@current[$($curr:tt)*]@rest,$($rest:tt)*)=>{$crate::__cargo_equip::crates::proconio::read_value!(@tuple@source[$source]@kinds[$($kinds)*[$($curr)*]]@current[]@rest$($rest)*)};(@tuple@source[$source:expr]@kinds[$($kinds:tt)*]@current[$($curr:tt)*]@rest$tt:tt$($rest:tt)*)=>{$crate::__cargo_equip::crates::proconio::read_value!(@tuple@source[$source]@kinds[$($kinds)*]@current[$($curr)*$tt]@rest$($rest)*)};(@source[$source:expr]@kind[])=>{compile_error!(concat!("Reached unreachable statement while parsing macro input.  ","This is a bug in `proconio`.  ","Please report this issue from ","<https://github.com/statiolake/proconio-rs/issues>."));};(@source[$source:expr]@kind[$kind:ty])=>{<$kind as$crate::__cargo_equip::crates::proconio::__Readable>::read($source)}}macro_rules!read_value{($($tt:tt)*)=>(crate::__cargo_equip_macro_def_proconio_read_value!{$($tt)*})}pub fn is_stdin_empty()->bool{use crate::__cargo_equip::crates::proconio::source::Source;let mut lock=STDIN_SOURCE.lock().expect(concat!("failed to lock the stdin; please re-run this program.  ","If this issue repeatedly occur, this is a bug in `proconio`.  ","Please report this issue from ","<https://github.com/statiolake/proconio-rs/issues>."));lock.is_empty()}}
        pub mod __proconio_derive_0_2_1 {pub use crate::__cargo_equip::macros::__proconio_derive_0_2_1::*;#[macro_export]macro_rules!__cargo_equip_macro_def___proconio_derive_0_2_1_derive_readable{($(_:tt)*)=>(::std::compile_error!("`derive_readable` from `proconio-derive 0.2.1` should have been expanded");)}#[macro_export]macro_rules!__cargo_equip_macro_def___proconio_derive_0_2_1_fastout{($(_:tt)*)=>(::std::compile_error!("`fastout` from `proconio-derive 0.2.1` should have been expanded");)}}
        pub mod re_rooting_dp {use crate::__cargo_equip::preludes::re_rooting_dp::*;use algebraic::{Act,Monoid};use graph::Graph;pub struct ReRootingDP<S>where S:Clone,{par:Vec<usize>,dp:Vec<S>,dpl:Vec<S>,dph:Vec<S>,}impl<T>ReRootingDP<T>where T:Clone,{pub fn build<M,V,E>(g:&Graph<V::S,E::S>)->Self where M:Monoid<S=T>,M::S:Clone,V:Act<X=M::S>,V::S:Clone,E:Act<X=M::S>,E::S:Clone,{let n=g.size();let mut ord=vec![];let mut par=vec![!0;n];let mut st=vec![0];while let Some(v)=st.pop(){ord.push(v);for&(u,_)in g.out_edges(v){if u!=0&&par[u]==!0{par[u]=v;st.push(u);}}}let mut dpl=vec![M::e();n];let mut dph=vec![M::e();n];let mut dp=vec![M::e();n];for&v in ord.iter().rev(){let es=g.out_edges(v).collect::<Vec<_>>();let m=es.len();let mut xl=vec![M::e();m+1];let mut xr=vec![M::e();m+1];for i in 0..m{let&(u,_)=es[i];if u==par[v]{xl[i+1]=xl[i].clone();}else{xl[i+1]=M::op(&xl[i],&dph[u]);}}for i in(0..m).rev(){let&(u,_)=es[i];if u==par[v]{xr[i]=xr[i+1].clone();}else{xr[i]=M::op(&dph[u],&xr[i+1]);}}for i in 0..m{let&(u,_)=es[i];if u!=par[v]{dph[u]=M::op(&xl[i],&xr[i+1]);}}dp[v]=xr[0].clone();dpl[v]=V::act(&g.vertices()[v],&dp[v]);for(u,w)in g.out_edges(v){if*u==par[v]{dph[v]=E::act(&w,&dpl[v]);}}}dp[0]=V::act(&g.vertices()[0],&dp[0]);for&(u,_)in g.out_edges(0){dph[u]=V::act(&g.vertices()[0],&dph[u]);}for&v in&ord{for(u,w)in g.out_edges(v){if*u==par[v]{continue;}let mut x=E::act(&w,&dph[*u]);for&(vv,_)in g.out_edges(*u){if vv==v{continue;}dph[vv]=M::op(&dph[vv],&x);dph[vv]=V::act(&g.vertices()[*u],&dph[vv]);}x=M::op(&dp[*u],&x);dp[*u]=V::act(&g.vertices()[*u],&x);}}Self{par,dp,dpl,dph}}pub fn prod(&self,v:usize)->T{self.dp[v].clone()}pub fn prod_subtree(&self,v:usize,p:usize)->T{if p==!0{self.dp[v].clone()}else if self.par[v]==p{self.dpl[v].clone()}else{self.dph[p].clone()}}}}
    }

    pub(crate) mod macros {
        pub mod algebraic {pub use crate::{__cargo_equip_macro_def_algebraic_act as act,__cargo_equip_macro_def_algebraic_algebra as algebra,__cargo_equip_macro_def_algebraic_group as group,__cargo_equip_macro_def_algebraic_monoid as monoid};}
        pub mod graph {}
        pub mod heavy_light_decomposition {}
        pub mod __lazy_static_1_4_0 {pub use crate::{__cargo_equip_macro_def___lazy_static_1_4_0___lazy_static_create as __lazy_static_create,__cargo_equip_macro_def___lazy_static_1_4_0___lazy_static_internal as __lazy_static_internal,__cargo_equip_macro_def___lazy_static_1_4_0_lazy_static as lazy_static};}
        pub mod proconio {pub use crate::{__cargo_equip_macro_def_proconio_input as input,__cargo_equip_macro_def_proconio_read_value as read_value};}
        pub mod __proconio_derive_0_2_1 {pub use crate::{__cargo_equip_macro_def___proconio_derive_0_2_1_derive_readable as derive_readable,__cargo_equip_macro_def___proconio_derive_0_2_1_fastout as fastout};}
        pub mod re_rooting_dp {}
    }

    pub(crate) mod prelude {pub use crate::__cargo_equip::{crates::*,macros::__lazy_static_1_4_0::*};}

    mod preludes {
        pub mod algebraic {}
        pub mod graph {}
        pub mod heavy_light_decomposition {pub(in crate::__cargo_equip)use crate::__cargo_equip::crates::graph;}
        pub mod __lazy_static_1_4_0 {pub(in crate::__cargo_equip)use crate::__cargo_equip::macros::__lazy_static_1_4_0::*;}
        pub mod proconio {pub(in crate::__cargo_equip)use crate::__cargo_equip::macros::__lazy_static_1_4_0::*;pub(in crate::__cargo_equip)use crate::__cargo_equip::crates::{__lazy_static_1_4_0 as lazy_static,__proconio_derive_0_2_1 as proconio_derive};}
        pub mod __proconio_derive_0_2_1 {}
        pub mod re_rooting_dp {pub(in crate::__cargo_equip)use crate::__cargo_equip::crates::{algebraic,graph};}
    }
}
0