結果
| 問題 | No.1790 Subtree Deletion |
| ユーザー |
 to-omer
|
| 提出日時 | 2021-12-19 00:40:24 |
| 言語 | Rust (1.77.0 + proconio) |
| 結果 |
AC
|
| 実行時間 | 53 ms / 3,000 ms |
| コード長 | 37,731 bytes |
| コンパイル時間 | 14,330 ms |
| コンパイル使用メモリ | 379,184 KB |
| 実行使用メモリ | 18,176 KB |
| 最終ジャッジ日時 | 2024-09-15 14:20:44 |
| 合計ジャッジ時間 | 16,078 ms |
|
ジャッジサーバーID （参考情報） |
judge4 / judge1 |
（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 | 1 ms
5,248 KB |
| testcase_01 | AC | 1 ms
5,248 KB |
| testcase_02 | AC | 1 ms
5,248 KB |
| testcase_03 | AC | 51 ms
18,176 KB |
| testcase_04 | AC | 49 ms
17,920 KB |
| testcase_05 | AC | 52 ms
18,176 KB |
| testcase_06 | AC | 52 ms
18,176 KB |
| testcase_07 | AC | 53 ms
18,176 KB |
| testcase_08 | AC | 6 ms
5,376 KB |
| testcase_09 | AC | 47 ms
16,256 KB |
| testcase_10 | AC | 52 ms
17,792 KB |
| testcase_11 | AC | 51 ms
17,920 KB |
| testcase_12 | AC | 45 ms
16,640 KB |
| testcase_13 | AC | 39 ms
14,336 KB |
| testcase_14 | AC | 12 ms
5,376 KB |
ソースコード
pub fn main() {
crate::prepare!();
sc!(n, (g, a): @TreeGraphScanner::<Usize1, u64>::new(n), q);
let mut et = EulerTourForVertex::new(&g);
et.subtree_vertex_tour(0, !0);
let mut b = vec![0u64; n];
let (ord, par) = g.tree_order(0);
let mut pa = vec![0u64; n];
for &u in ord.iter().rev() {
for adj in g.adjacencies(u) {
if adj.to != par[u] {
b[u] ^= a[adj.id];
pa[adj.to] = a[adj.id];
}
}
if par[u] < n {
b[par[u]] ^= b[u];
}
}
let mut seg = SegmentTree::<BitXorOperation<u64>>::new(n);
let mut removed = vec![false; n];
for _ in 0..q {
sc!(t, x: Usize1);
let res = if removed[x] {
0
} else {
b[x] ^ et.subtree_query(x, |l, r| seg.fold(l, r))
};
if t == 1 {
if !removed[x] {
et.subtree_update(x, res, |k, x| seg.update(k, x));
if par[x] < n {
et.subtree_update(par[x], pa[x], |k, x| seg.update(k, x));
}
crecurse!(
[removed: [bool]],
fn dfs(u: usize, p: usize) {
if removed[u] {
return;
}
removed[u] = true;
for a in g.adjacencies(u) {
if a.to != p {
dfs!(a.to, p);
}
}
}
)(x, par[x]);
removed[x] = true;
}
} else {
pp!(res);
}
}
}
#[allow(unused_imports)]use std::{cmp::{Ordering,Reverse},collections::{BTreeMap,BTreeSet,BinaryHeap,HashMap,HashSet,VecDeque}};
mod main_macros{#[doc=" Prepare useful macros."]#[doc=" - `prepare!();`: default (all input scanner (`sc!`, `sv!`) + buf print (`pp!`))"]#[doc=" - `prepare!(?);`: interactive (line scanner (`scln!`) + buf print (`pp!`))"]#[macro_export]macro_rules!prepare{(@normal($dol:tt))=>{#[allow(unused_imports)]use std::io::Write as _;let __out=std::io::stdout();#[allow(unused_mut,unused_variables)]let mut __out=std::io::BufWriter::new(__out.lock());#[allow(unused_macros)]macro_rules!pp{($dol($dol t:tt)*)=>{$dol crate::iter_print!(__out,$dol($dol t)*)}}let __in_buf=read_stdin_all_unchecked();#[allow(unused_mut,unused_variables)]let mut __scanner=Scanner::new(&__in_buf);#[allow(unused_macros)]macro_rules!sc{($dol($dol t:tt)*)=>{$dol crate::scan!(__scanner,$dol($dol t)*)}}#[allow(unused_macros)]macro_rules!sv{($dol($dol t:tt)*)=>{$dol crate::scan_value!(__scanner,$dol($dol t)*)}}};(@interactive($dol:tt))=>{#[allow(unused_imports)]use std::io::Write as _;let __out=std::io::stdout();#[allow(unused_mut,unused_variables)]let mut __out=std::io::BufWriter::new(__out.lock());#[allow(unused_macros)]#[doc=" - to flush: `pp!(@flush);`"]macro_rules!pp{($dol($dol t:tt)*)=>{$dol crate::iter_print!(__out,$dol($dol t)*)}}#[allow(unused_macros)]#[doc=" Scan a line, and previous line will be truncated in the next call."]macro_rules!scln{($dol($dol t:tt)*)=>{let __in_buf=read_stdin_line();#[allow(unused_mut,unused_variables)]let mut __scanner=Scanner::new(&__in_buf);$dol crate::scan!(__scanner,$dol($dol t)*)}}};()=>{$crate::prepare!(@normal($))};(?)=>{$crate::prepare!(@interactive($))};}}
mod iter_print{use std::{fmt::Display,io::{Error,Write}};pub trait IterPrint{fn iter_print<W,S>(self,writer:&mut W,sep:S,is_head:bool)->Result<(),Error>where W:Write,S:Display;}macro_rules!iter_print_tuple_impl{(@impl$($A:ident$a:ident)?,$($B:ident$b:ident)*)=>{impl<$($A,)?$($B),*>IterPrint for($($A,)?$($B),*)where$($A:Display,)?$($B:Display),*{#[allow(unused_variables)]fn iter_print<W,S>(self,writer:&mut W,sep:S,is_head:bool)->Result<(),Error>where W:Write,S:Display{let($($a,)?$($b,)*)=self;$(if is_head{::std::write!(writer,"{}",$a)?;}else{::std::write!(writer,"{}{}",sep,$a)?;})?$(::std::write!(writer,"{}{}",sep,$b)?;)*Ok(())}}};(@inc,,$C:ident$c:ident$($D:ident$d:ident)*)=>{iter_print_tuple_impl!(@impl,);iter_print_tuple_impl!(@inc$C$c,,$($D$d)*);};(@inc$A:ident$a:ident,$($B:ident$b:ident)*,$C:ident$c:ident$($D:ident$d:ident)*)=>{iter_print_tuple_impl!(@impl$A$a,$($B$b)*);iter_print_tuple_impl!(@inc$A$a,$($B$b)*$C$c,$($D$d)*);};(@inc$A:ident$a:ident,$($B:ident$b:ident)*,)=>{iter_print_tuple_impl!(@impl$A$a,$($B$b)*);};($($t:tt)*)=>{iter_print_tuple_impl!(@inc,,$($t)*);};}iter_print_tuple_impl!(A a B b C c D d E e F f G g H h I i J j K k);#[doc=" Print expressions with a separator."]#[doc=" - `iter_print!(writer, args...)`"]#[doc=" - `@sep $expr`: set separator (default: `' '`)"]#[doc=" - `@fmt $lit => {$($expr),*}`: print `format!($lit, $($expr),*)`"]#[doc=" - `@flush`: flush writer (auto insert `!`)"]#[doc=" - `@iter $expr`: print iterator"]#[doc=" - `@iterns $expr`: print iterator with no separators"]#[doc=" - `@iterln $expr`: print iterator with separator `'\\n'`"]#[doc=" - `@iter2d $expr`: print 2d-iterator"]#[doc=" - `@tuple $expr`: print tuple (need to import [`IterPrint`], each elements impls `Display`)"]#[doc=" - `$expr`: print expr"]#[doc=" - `;`: print `'\\n'`"]#[doc=" - `!`: not print `'\\n'` at the end"]#[macro_export]macro_rules!iter_print{(@@fmt$writer:expr,$sep:expr,$is_head:expr,$lit:literal,$($e:expr),*)=>{if!$is_head{::std::write!($writer,"{}",$sep).expect("io error");}::std::write!($writer,$lit,$($e),*).expect("io error");};(@@item$writer:expr,$sep:expr,$is_head:expr,$e:expr)=>{$crate::iter_print!(@@fmt$writer,$sep,$is_head,"{}",$e);};(@@line_feed$writer:expr$(,)?)=>{::std::writeln!($writer).expect("io error");};(@@iter$writer:expr,$sep:expr,$is_head:expr,$iter:expr)=>{{let mut iter=$iter.into_iter();if let Some(item)=iter.next(){$crate::iter_print!(@@item$writer,$sep,$is_head,item);}for item in iter{$crate::iter_print!(@@item$writer,$sep,false,item);}}};(@@iterns$writer:expr,$sep:expr,$is_head:expr,$iter:expr)=>{{let mut iter=$iter.into_iter();if let Some(item)=iter.next(){$crate::iter_print!(@@item$writer,$sep,$is_head,item);}for item in iter{$crate::iter_print!(@@item$writer,$sep,true,item);}}};(@@iterln$writer:expr,$sep:expr,$is_head:expr,$iter:expr)=>{{let mut iter=$iter.into_iter();if let Some(item)=iter.next(){$crate::iter_print!(@@item$writer,'\n',$is_head,item);}for item in iter{$crate::iter_print!(@@item$writer,'\n',false,item);}}};(@@iter2d$writer:expr,$sep:expr,$is_head:expr,$iter:expr)=>{let mut iter=$iter.into_iter();if let Some(item)=iter.next(){$crate::iter_print!(@@iter$writer,$sep,$is_head,item);}for item in iter{$crate::iter_print!(@@line_feed$writer);$crate::iter_print!(@@iter$writer,$sep,true,item);}};(@@tuple$writer:expr,$sep:expr,$is_head:expr,$tuple:expr)=>{IterPrint::iter_print($tuple,&mut$writer,$sep,$is_head).expect("io error");};(@@assert_tag item)=>{};(@@assert_tag iter)=>{};(@@assert_tag iterns)=>{};(@@assert_tag iterln)=>{};(@@assert_tag iter2d)=>{};(@@assert_tag tuple)=>{};(@@assert_tag$tag:ident)=>{::std::compile_error!(::std::concat!("invalid tag in `iter_print!`: `",std::stringify!($tag),"`"));};(@@inner$writer:expr,$sep:expr,$is_head:expr,@sep$e:expr,$($t:tt)*)=>{$crate::iter_print!(@@inner$writer,$e,$is_head,$($t)*);};(@@inner$writer:expr,$sep:expr,$is_head:expr,@flush$($t:tt)*)=>{$writer.flush().expect("io error");$crate::iter_print!(@@inner$writer,$sep,$is_head,!$($t)*);};(@@inner$writer:expr,$sep:expr,$is_head:expr,@fmt$lit:literal=>{$($e:expr),*$(,)?}$($t:tt)*)=>{$crate::iter_print!(@@fmt$writer,$sep,$is_head,$lit,$($e),*);$crate::iter_print!(@@inner$writer,$sep,$is_head,$($t)*);};(@@inner$writer:expr,$sep:expr,$is_head:expr,@$tag:ident$e:expr,$($t:tt)*)=>{$crate::iter_print!(@@assert_tag$tag);$crate::iter_print!(@@$tag$writer,$sep,$is_head,$e);$crate::iter_print!(@@inner$writer,$sep,false,$($t)*);};(@@inner$writer:expr,$sep:expr,$is_head:expr,@$tag:ident$e:expr;$($t:tt)*)=>{$crate::iter_print!(@@assert_tag$tag);$crate::iter_print!(@@$tag$writer,$sep,$is_head,$e);$crate::iter_print!(@@line_feed$writer);$crate::iter_print!(@@inner$writer,$sep,true,$($t)*);};(@@inner$writer:expr,$sep:expr,$is_head:expr,@$tag:ident$e:expr)=>{$crate::iter_print!(@@assert_tag$tag);$crate::iter_print!(@@$tag$writer,$sep,$is_head,$e);$crate::iter_print!(@@inner$writer,$sep,false,);};(@@inner$writer:expr,$sep:expr,$is_head:expr,@$tag:ident$($t:tt)*)=>{::std::compile_error!(::std::concat!("invalid expr in `iter_print!`: `",std::stringify!($($t)*),"`"));};(@@inner$writer:expr,$sep:expr,$is_head:expr,,$($t:tt)*)=>{$crate::iter_print!(@@inner$writer,$sep,$is_head,$($t)*);};(@@inner$writer:expr,$sep:expr,$is_head:expr,;$($t:tt)*)=>{$crate::iter_print!(@@line_feed$writer);$crate::iter_print!(@@inner$writer,$sep,$is_head,$($t)*);};(@@inner$writer:expr,$sep:expr,$is_head:expr,!$(,)?)=>{};(@@inner$writer:expr,$sep:expr,$is_head:expr,!$($t:tt)*)=>{$crate::iter_print!(@@inner$writer,$sep,$is_head,$($t)*);};(@@inner$writer:expr,$sep:expr,$is_head:expr,)=>{$crate::iter_print!(@@line_feed$writer);};(@@inner$writer:expr,$sep:expr,$is_head:expr,$($t:tt)*)=>{$crate::iter_print!(@@inner$writer,$sep,$is_head,@item$($t)*);};($writer:expr,$($t:tt)*)=>{{$crate::iter_print!(@@inner$writer,' ',true,$($t)*);}};}}
pub use self::scanner::*;
mod scanner{use std::{iter::{from_fn,repeat_with,FromIterator},marker::PhantomData};pub fn read_stdin_all()->String{use std::io::Read as _;let mut s=String::new();std::io::stdin().read_to_string(&mut s).expect("io error");s}pub fn read_stdin_all_unchecked()->String{use std::io::Read as _;let mut buf=Vec::new();std::io::stdin().read_to_end(&mut buf).expect("io error");unsafe{String::from_utf8_unchecked(buf)}}pub fn read_all(mut reader:impl std::io::Read)->String{let mut s=String::new();reader.read_to_string(&mut s).expect("io error");s}pub fn read_all_unchecked(mut reader:impl std::io::Read)->String{let mut buf=Vec::new();reader.read_to_end(&mut buf).expect("io error");unsafe{String::from_utf8_unchecked(buf)}}pub fn read_stdin_line()->String{let mut s=String::new();std::io::stdin().read_line(&mut s).expect("io error");s}pub trait IterScan:Sized{type Output;fn scan<'a,I:Iterator<Item=&'a str>>(iter:&mut I)->Option<Self::Output>;}pub trait MarkedIterScan:Sized{type Output;fn mscan<'a,I:Iterator<Item=&'a str>>(self,iter:&mut I)->Option<Self::Output>;}#[derive(Clone,Debug)]pub struct Scanner<'a>{iter:std::str::SplitAsciiWhitespace<'a>}impl<'a>Scanner<'a>{#[inline]pub fn new(s:&'a str)->Self{let iter=s.split_ascii_whitespace();Self{iter}}#[inline]pub fn scan<T>(&mut self)-><T as IterScan>::Output where T:IterScan{<T as IterScan>::scan(&mut self.iter).expect("scan error")}#[inline]pub fn mscan<T>(&mut self,marker:T)-><T as MarkedIterScan>::Output where T:MarkedIterScan{marker.mscan(&mut self.iter).expect("scan error")}#[inline]pub fn scan_vec<T>(&mut self,size:usize)->Vec<<T as IterScan>::Output>where T:IterScan{(0..size).map(|_|<T as IterScan>::scan(&mut self.iter).expect("scan error")).collect()}#[inline]pub fn iter<'b,T>(&'b mut self)->ScannerIter<'a,'b,T>where T:IterScan{ScannerIter{inner:self,_marker:std::marker::PhantomData}}}macro_rules!iter_scan_impls{($($t:ty)*)=>{$(impl IterScan for$t{type Output=Self;#[inline]fn scan<'a,I:Iterator<Item=&'a str>>(iter:&mut I)->Option<Self>{iter.next()?.parse::<$t>().ok()}})*};}iter_scan_impls!(char u8 u16 u32 u64 usize i8 i16 i32 i64 isize f32 f64 u128 i128 String);macro_rules!iter_scan_tuple_impl{(@impl$($T:ident)*)=>{impl<$($T:IterScan),*>IterScan for($($T,)*){type Output=($(<$T as IterScan>::Output,)*);#[inline]fn scan<'a,It:Iterator<Item=&'a str>>(_iter:&mut It)->Option<Self::Output>{Some(($(<$T as IterScan>::scan(_iter)?,)*))}}};(@inner$($T:ident)*,)=>{iter_scan_tuple_impl!(@impl$($T)*);};(@inner$($T:ident)*,$U:ident$($Rest:ident)*)=>{iter_scan_tuple_impl!(@impl$($T)*);iter_scan_tuple_impl!(@inner$($T)*$U,$($Rest)*);};($($T:ident)*)=>{iter_scan_tuple_impl!(@inner,$($T)*);};}iter_scan_tuple_impl!(A B C D E F G H I J K);pub struct ScannerIter<'a,'b,T>{inner:&'b mut Scanner<'a>,_marker:std::marker::PhantomData<fn()->T>}impl<'a,'b,T>Iterator for ScannerIter<'a,'b,T>where T:IterScan{type Item=<T as IterScan>::Output;#[inline]fn next(&mut self)->Option<Self::Item>{<T as IterScan>::scan(&mut self.inner.iter)}}#[doc=" - `scan_value!(scanner, ELEMENT)`"]#[doc=""]#[doc=" ELEMENT :="]#[doc=" - `$ty`: IterScan"]#[doc=" - `@$expr`: MarkedIterScan"]#[doc=" - `[ELEMENT; $expr]`: vector"]#[doc=" - `[ELEMENT]`: iterator"]#[doc=" - `($(ELEMENT)*,)`: tuple"]#[macro_export]macro_rules!scan_value{(@repeat$scanner:expr,[$($t:tt)*]$($len:expr)?)=>{::std::iter::repeat_with(||$crate::scan_value!(@inner$scanner,[]$($t)*))$(.take($len).collect::<Vec<_>>())?};(@tuple$scanner:expr,[$([$($args:tt)*])*])=>{($($($args)*,)*)};(@$tag:ident$scanner:expr,[[$($args:tt)*]])=>{$($args)*};(@$tag:ident$scanner:expr,[$($args:tt)*]@$e:expr)=>{$crate::scan_value!(@$tag$scanner,[$($args)*[$scanner.mscan($e)]])};(@$tag:ident$scanner:expr,[$($args:tt)*]@$e:expr,$($t:tt)*)=>{$crate::scan_value!(@$tag$scanner,[$($args)*[$scanner.mscan($e)]]$($t)*)};(@$tag:ident$scanner:expr,[$($args:tt)*]($($tuple:tt)*)$($t:tt)*)=>{$crate::scan_value!(@$tag$scanner,[$($args)*[$crate::scan_value!(@tuple$scanner,[]$($tuple)*)]]$($t)*)};(@$tag:ident$scanner:expr,[$($args:tt)*][@$e:expr;$len:expr]$($t:tt)*)=>{$crate::scan_value!(@$tag$scanner,[$($args)*[$crate::scan_value!(@repeat$scanner,[@$e]$len)]]$($t)*)};(@$tag:ident$scanner:expr,[$($args:tt)*][[$($tt:tt)*];$len:expr]$($t:tt)*)=>{$crate::scan_value!(@$tag$scanner,[$($args)*[$crate::scan_value!(@repeat$scanner,[[$($tt)*]]$len)]]$($t)*)};(@$tag:ident$scanner:expr,[$($args:tt)*][($($tt:tt)*);$len:expr]$($t:tt)*)=>{$crate::scan_value!(@$tag$scanner,[$($args)*[$crate::scan_value!(@repeat$scanner,[($($tt)*)]$len)]]$($t)*)};(@$tag:ident$scanner:expr,[$($args:tt)*][$ty:ty;$len:expr]$($t:tt)*)=>{$crate::scan_value!(@$tag$scanner,[$($args)*[$crate::scan_value!(@repeat$scanner,[$ty]$len)]]$($t)*)};(@$tag:ident$scanner:expr,[$($args:tt)*][$($tt:tt)*]$($t:tt)*)=>{$crate::scan_value!(@$tag$scanner,[$($args)*[$crate::scan_value!(@repeat$scanner,[$($tt)*])]]$($t)*)};(@$tag:ident$scanner:expr,[$($args:tt)*]$ty:ty)=>{$crate::scan_value!(@$tag$scanner,[$($args)*[$scanner.scan::<$ty>()]])};(@$tag:ident$scanner:expr,[$($args:tt)*]$ty:ty,$($t:tt)*)=>{$crate::scan_value!(@$tag$scanner,[$($args)*[$scanner.scan::<$ty>()]]$($t)*)};(@$tag:ident$scanner:expr,[$($args:tt)*],$($t:tt)*)=>{$crate::scan_value!(@$tag$scanner,[$($args)*]$($t)*)};(@$tag:ident$scanner:expr,[$($args:tt)*])=>{::std::compile_error!(::std::stringify!($($args)*))};($scanner:expr,$($t:tt)*)=>{$crate::scan_value!(@inner$scanner,[]$($t)*)}}#[doc=" - `scan!(scanner, $($pat $(: ELEMENT)?),*)`"]#[macro_export]macro_rules!scan{(@assert$p:pat)=>{};(@assert$($p:tt)*)=>{::std::compile_error!(::std::concat!("expected pattern, found `",::std::stringify!($($p)*),"`"));};(@pat$scanner:expr,[][])=>{};(@pat$scanner:expr,[][],$($t:tt)*)=>{$crate::scan!(@pat$scanner,[][]$($t)*)};(@pat$scanner:expr,[$($p:tt)*][]$x:ident$($t:tt)*)=>{$crate::scan!(@pat$scanner,[$($p)*$x][]$($t)*)};(@pat$scanner:expr,[$($p:tt)*][]::$($t:tt)*)=>{$crate::scan!(@pat$scanner,[$($p)*::][]$($t)*)};(@pat$scanner:expr,[$($p:tt)*][]&$($t:tt)*)=>{$crate::scan!(@pat$scanner,[$($p)*&][]$($t)*)};(@pat$scanner:expr,[$($p:tt)*][]($($x:tt)*)$($t:tt)*)=>{$crate::scan!(@pat$scanner,[$($p)*($($x)*)][]$($t)*)};(@pat$scanner:expr,[$($p:tt)*][][$($x:tt)*]$($t:tt)*)=>{$crate::scan!(@pat$scanner,[$($p)*[$($x)*]][]$($t)*)};(@pat$scanner:expr,[$($p:tt)*][]{$($x:tt)*}$($t:tt)*)=>{$crate::scan!(@pat$scanner,[$($p)*{$($x)*}][]$($t)*)};(@pat$scanner:expr,[$($p:tt)*][]:$($t:tt)*)=>{$crate::scan!(@ty$scanner,[$($p)*][]$($t)*)};(@pat$scanner:expr,[$($p:tt)*][]$($t:tt)*)=>{$crate::scan!(@let$scanner,[$($p)*][usize]$($t)*)};(@ty$scanner:expr,[$($p:tt)*][$($tt:tt)*]@$e:expr)=>{$crate::scan!(@let$scanner,[$($p)*][$($tt)*@$e])};(@ty$scanner:expr,[$($p:tt)*][$($tt:tt)*]@$e:expr,$($t:tt)*)=>{$crate::scan!(@let$scanner,[$($p)*][$($tt)*@$e],$($t)*)};(@ty$scanner:expr,[$($p:tt)*][$($tt:tt)*]($($x:tt)*)$($t:tt)*)=>{$crate::scan!(@let$scanner,[$($p)*][$($tt)*($($x)*)]$($t)*)};(@ty$scanner:expr,[$($p:tt)*][$($tt:tt)*][$($x:tt)*]$($t:tt)*)=>{$crate::scan!(@let$scanner,[$($p)*][$($tt)*[$($x)*]]$($t)*)};(@ty$scanner:expr,[$($p:tt)*][$($tt:tt)*]$ty:ty)=>{$crate::scan!(@let$scanner,[$($p)*][$($tt)*$ty])};(@ty$scanner:expr,[$($p:tt)*][$($tt:tt)*]$ty:ty,$($t:tt)*)=>{$crate::scan!(@let$scanner,[$($p)*][$($tt)*$ty],$($t)*)};(@let$scanner:expr,[$($p:tt)*][$($tt:tt)*]$($t:tt)*)=>{$crate::scan!{@assert$($p)*}let$($p)* =$crate::scan_value!($scanner,$($tt)*);$crate::scan!(@pat$scanner,[][]$($t)*)};($scanner:expr,$($t:tt)*)=>{$crate::scan!(@pat$scanner,[][]$($t)*)}}#[derive(Debug,Copy,Clone)]pub struct Usize1;impl IterScan for Usize1{type Output=usize;#[inline]fn scan<'a,I:Iterator<Item=&'a str>>(iter:&mut I)->Option<Self::Output>{<usize as IterScan>::scan(iter)?.checked_sub(1)}}#[derive(Debug,Copy,Clone)]pub struct CharWithBase(pub char);impl MarkedIterScan for CharWithBase{type Output=usize;#[inline]fn mscan<'a,I:Iterator<Item=&'a str>>(self,iter:&mut I)->Option<Self::Output>{Some((<char as IterScan>::scan(iter)?as u8-self.0 as u8)as usize)}}#[derive(Debug,Copy,Clone)]pub struct Chars;impl IterScan for Chars{type Output=Vec<char>;#[inline]fn scan<'a,I:Iterator<Item=&'a str>>(iter:&mut I)->Option<Self::Output>{Some(iter.next()?.chars().collect())}}#[derive(Debug,Copy,Clone)]pub struct CharsWithBase(pub char);impl MarkedIterScan for CharsWithBase{type Output=Vec<usize>;#[inline]fn mscan<'a,I:Iterator<Item=&'a str>>(self,iter:&mut I)->Option<Self::Output>{Some(iter.next()?.chars().map(|c|(c as u8-self.0 as u8)as usize).collect())}}#[derive(Debug,Copy,Clone)]pub struct ByteWithBase(pub u8);impl MarkedIterScan for ByteWithBase{type Output=usize;#[inline]fn mscan<'a,I:Iterator<Item=&'a str>>(self,iter:&mut I)->Option<Self::Output>{Some((<char as IterScan>::scan(iter)?as u8-self.0)as usize)}}#[derive(Debug,Copy,Clone)]pub struct Bytes;impl IterScan for Bytes{type Output=Vec<u8>;#[inline]fn scan<'a,I:Iterator<Item=&'a str>>(iter:&mut I)->Option<Self::Output>{Some(iter.next()?.bytes().collect())}}#[derive(Debug,Copy,Clone)]pub struct BytesWithBase(pub u8);impl MarkedIterScan for BytesWithBase{type Output=Vec<usize>;#[inline]fn mscan<'a,I:Iterator<Item=&'a str>>(self,iter:&mut I)->Option<Self::Output>{Some(iter.next()?.bytes().map(|c|(c-self.0)as usize).collect())}}#[derive(Debug,Copy,Clone)]pub struct Collect<T,B=Vec<<T as IterScan>::Output>>where T:IterScan,B:FromIterator<<T as IterScan>::Output>{size:usize,_marker:PhantomData<fn()->(T,B)>}impl<T,B>Collect<T,B>where T:IterScan,B:FromIterator<<T as IterScan>::Output>{pub fn new(size:usize)->Self{Self{size,_marker:PhantomData}}}impl<T,B>MarkedIterScan for Collect<T,B>where T:IterScan,B:FromIterator<<T as IterScan>::Output>{type Output=B;#[inline]fn mscan<'a,I:Iterator<Item=&'a str>>(self,iter:&mut I)->Option<Self::Output>{repeat_with(||<T as IterScan>::scan(iter)).take(self.size).collect()}}#[derive(Debug,Copy,Clone)]pub struct SizedCollect<T,B=Vec<<T as IterScan>::Output>>where T:IterScan,B:FromIterator<<T as IterScan>::Output>{_marker:PhantomData<fn()->(T,B)>}impl<T,B>IterScan for SizedCollect<T,B>where T:IterScan,B:FromIterator<<T as IterScan>::Output>{type Output=B;#[inline]fn scan<'a,I:Iterator<Item=&'a str>>(iter:&mut I)->Option<Self::Output>{let size=usize::scan(iter)?;repeat_with(||<T as IterScan>::scan(iter)).take(size).collect()}}#[derive(Debug,Copy,Clone)]pub struct Splitted<T,P>where T:IterScan{pat:P,_marker:PhantomData<fn()->T>}impl<T,P>Splitted<T,P>where T:IterScan{pub fn new(pat:P)->Self{Self{pat,_marker:PhantomData}}}impl<T>MarkedIterScan for Splitted<T,char>where T:IterScan{type Output=Vec<<T as IterScan>::Output>;fn mscan<'a,I:Iterator<Item=&'a str>>(self,iter:&mut I)->Option<Self::Output>{let mut iter=iter.next()?.split(self.pat);Some(from_fn(||<T as IterScan>::scan(&mut iter)).collect())}}impl<T>MarkedIterScan for Splitted<T,&str>where T:IterScan{type Output=Vec<<T as IterScan>::Output>;fn mscan<'a,I:Iterator<Item=&'a str>>(self,iter:&mut I)->Option<Self::Output>{let mut iter=iter.next()?.split(self.pat);Some(from_fn(||<T as IterScan>::scan(&mut iter)).collect())}}impl<T,F>MarkedIterScan for F where F:Fn(&str)->Option<T>{type Output=T;fn mscan<'a,I:Iterator<Item=&'a str>>(self,iter:&mut I)->Option<Self::Output>{self(iter.next()?)}}}
pub use self::sparse_graph::*;
mod sparse_graph{use super::{IterScan,MarkedIterScan};use std::{marker::PhantomData,ops,slice};type Marker<T>=PhantomData<fn()->T>;#[derive(Clone,Copy,Debug,Default,Eq,PartialEq,Ord,PartialOrd,Hash)]pub struct DirectedEdge;#[derive(Clone,Copy,Debug,Default,Eq,PartialEq,Ord,PartialOrd,Hash)]pub struct UndirectedEdge;#[derive(Clone,Copy,Debug,Default,Eq,PartialEq,Ord,PartialOrd,Hash)]pub struct BidirectionalEdge;#[derive(Clone,Copy,Debug,Default,Eq,PartialEq,Ord,PartialOrd,Hash)]pub struct Adjacency{pub id:usize,pub to:usize}impl Adjacency{pub fn new(id:usize,to:usize)->Adjacency{Adjacency{id,to}}}#[doc=" Static Sparse Graph represented as Compressed Sparse Row."]#[derive(Debug,Clone)]pub struct SparseGraph<D>{vsize:usize,pub start:Vec<usize>,pub elist:Vec<Adjacency>,pub edges:Vec<(usize,usize)>,_marker:Marker<D>}impl<D>SparseGraph<D>{#[doc=" Return the number of vertices."]pub fn vertices_size(&self)->usize{self.vsize}#[doc=" Return the number of edges."]pub fn edges_size(&self)->usize{self.edges.len()}#[doc=" Return an iterator over graph vertices."]pub fn vertices(&self)->ops::Range<usize>{0..self.vertices_size()}#[doc=" Return a slice of adjacency vertices."]pub fn adjacencies(&self,v:usize)->slice::Iter<'_,Adjacency>{self.elist[self.start[v]..self.start[v+1]].iter()}}pub trait SparseGraphConstruction:Sized{fn construct_graph(vsize:usize,edges:Vec<(usize,usize)>)->SparseGraph<Self>;}impl<D:SparseGraphConstruction>SparseGraph<D>{#[doc=" Construct graph from edges."]pub fn from_edges(vsize:usize,edges:Vec<(usize,usize)>)->Self{D::construct_graph(vsize,edges)}}impl SparseGraphConstruction for DirectedEdge{fn construct_graph(vsize:usize,edges:Vec<(usize,usize)>)->SparseGraph<Self>{let mut start:Vec<_>=vec![0usize;vsize+1];for(from,_)in edges.iter().cloned(){start[from]+=1;}for i in 1..=vsize{start[i]+=start[i-1];}let mut elist=Vec::<Adjacency>::with_capacity(edges.len());let ptr=elist.as_mut_ptr();for(id,(from,to))in edges.iter().cloned().enumerate(){start[from]-=1;unsafe{ptr.add(start[from]).write(Adjacency::new(id,to))};}unsafe{elist.set_len(edges.len())};SparseGraph{vsize,start,elist,edges,_marker:PhantomData}}}impl SparseGraphConstruction for UndirectedEdge{fn construct_graph(vsize:usize,edges:Vec<(usize,usize)>)->SparseGraph<Self>{let mut start:Vec<_>=vec![0usize;vsize+1];for(from,to)in edges.iter().cloned(){start[to]+=1;start[from]+=1;}for i in 1..=vsize{start[i]+=start[i-1];}let mut elist=Vec::<Adjacency>::with_capacity(edges.len()*2);let ptr=elist.as_mut_ptr();for(id,(from,to))in edges.iter().cloned().enumerate(){start[from]-=1;unsafe{ptr.add(start[from]).write(Adjacency::new(id,to))};start[to]-=1;unsafe{ptr.add(start[to]).write(Adjacency::new(id,from))};}unsafe{elist.set_len(edges.len()*2)};SparseGraph{vsize,start,elist,edges,_marker:PhantomData}}}impl SparseGraphConstruction for BidirectionalEdge{fn construct_graph(vsize:usize,edges:Vec<(usize,usize)>)->SparseGraph<Self>{let mut start:Vec<_>=vec![0usize;vsize+1];for(from,to)in edges.iter().cloned(){start[to]+=1;start[from]+=1;}for i in 1..=vsize{start[i]+=start[i-1];}let mut elist=Vec::<Adjacency>::with_capacity(edges.len()*2);let ptr=elist.as_mut_ptr();for(id,(from,to))in edges.iter().cloned().enumerate(){start[from]-=1;unsafe{ptr.add(start[from]).write(Adjacency::new(id*2,to))};start[to]-=1;unsafe{ptr.add(start[to]).write(Adjacency::new(id*2+1,from))};}unsafe{elist.set_len(edges.len()*2)};SparseGraph{vsize,start,elist,edges,_marker:PhantomData}}}pub type DirectedSparseGraph=SparseGraph<DirectedEdge>;pub type UndirectedSparseGraph=SparseGraph<UndirectedEdge>;pub type BidirectionalSparseGraph=SparseGraph<BidirectionalEdge>;pub struct SparseGraphScanner<U:IterScan<Output=usize>,T:IterScan,D>{vsize:usize,esize:usize,_marker:Marker<(U,T,D)>}impl<U:IterScan<Output=usize>,T:IterScan,D>SparseGraphScanner<U,T,D>{pub fn new(vsize:usize,esize:usize)->Self{Self{vsize,esize,_marker:PhantomData}}}impl<U:IterScan<Output=usize>,T:IterScan,D:SparseGraphConstruction>MarkedIterScan for SparseGraphScanner<U,T,D>{type Output=(SparseGraph<D>,Vec<<T as IterScan>::Output>);fn mscan<'a,I:Iterator<Item=&'a str>>(self,iter:&mut I)->Option<Self::Output>{let mut edges=Vec::with_capacity(self.esize);let mut rest=Vec::with_capacity(self.esize);for _ in 0..self.esize{edges.push((U::scan(iter)?,U::scan(iter)?));rest.push(T::scan(iter)?);}let graph=SparseGraph::from_edges(self.vsize,edges);Some((graph,rest))}}pub type DirectedGraphScanner<U,T=()>=SparseGraphScanner<U,T,DirectedEdge>;pub type UndirectedGraphScanner<U,T=()>=SparseGraphScanner<U,T,UndirectedEdge>;pub type BidirectionalGraphScanner<U,T=()>=SparseGraphScanner<U,T,BidirectionalEdge>;pub struct TreeGraphScanner<U:IterScan<Output=usize>,T:IterScan=()>{vsize:usize,_marker:Marker<(U,T)>}impl<U:IterScan<Output=usize>,T:IterScan>TreeGraphScanner<U,T>{pub fn new(vsize:usize)->Self{Self{vsize,_marker:PhantomData}}}impl<U:IterScan<Output=usize>,T:IterScan>MarkedIterScan for TreeGraphScanner<U,T>{type Output=(UndirectedSparseGraph,Vec<<T as IterScan>::Output>);fn mscan<'a,I:Iterator<Item=&'a str>>(self,iter:&mut I)->Option<Self::Output>{UndirectedGraphScanner::<U,T>::new(self.vsize,self.vsize-1).mscan(iter)}}}
#[derive(Clone,Debug)]pub struct EulerTourForVertex<'a>{graph:&'a UndirectedSparseGraph,pub vidx:Vec<(usize,usize)>,vpos:usize}
impl<'a>EulerTourForVertex<'a>{pub fn new(graph:&'a UndirectedSparseGraph)->Self{Self{graph,vidx:vec![(0,0);graph.vertices_size()],vpos:0}}pub fn length(&self)->usize{self.vpos}pub fn subtree_vertex_tour(&mut self,u:usize,p:usize){self.vidx[u].0=self.vpos;self.vpos+=1;for a in self.graph.adjacencies(u).filter(|a|a.to!=p){self.subtree_vertex_tour(a.to,u);}self.vidx[u].1=self.vpos;}pub fn path_vertex_tour(&mut self,u:usize,p:usize){self.vidx[u].0=self.vpos;self.vpos+=1;for a in self.graph.adjacencies(u).filter(|a|a.to!=p){self.path_vertex_tour(a.to,u);}self.vidx[u].1=self.vpos;self.vpos+=1;}pub fn subtree_query<T,F:FnMut(usize,usize)->T>(&self,u:usize,mut f:F)->T{let(l,r)=self.vidx[u];f(l,r)}pub fn subtree_update<T,F:FnMut(usize,T)>(&self,u:usize,x:T,mut f:F){let(l,_r)=self.vidx[u];f(l,x);}pub fn path_query<T,F:FnMut(usize,usize)->T>(&self,u:usize,v:usize,mut f:F)->T{let(mut l,mut r)=(self.vidx[u].0,self.vidx[v].0);if l>r{std::mem::swap(&mut l,&mut r);}f(l,r+1)}pub fn path_update<T,F:FnMut(usize,T)>(&self,u:usize,x:T,invx:T,mut f:F){let(l,r)=self.vidx[u];f(l,x);f(r,invx);}}
pub use self::bitxor_operation_impl::{BitXorIdentity,BitXorOperation};
mod bitxor_operation_impl{use super::*;use std::{marker::PhantomData,ops::BitXor};#[doc=" ^"]pub struct BitXorOperation<T:Clone+BitXorIdentity>{_marker:PhantomData<fn()->T>}pub trait BitXorIdentity:Sized+BitXor<Output=Self>{fn xor_zero()->Self;}#[macro_export]macro_rules!impl_bitxor_identity{([$($wh:tt)*],$t:ty,$xor_zero:expr)=>{impl<$($wh)*>BitXorIdentity for$t{#[inline]fn xor_zero()->Self{$xor_zero}}};($t:ty,$xor_zero:expr)=>{impl BitXorIdentity for$t{#[inline]fn xor_zero()->Self{$xor_zero}}};}impl_bitxor_identity!(bool,false);impl_bitxor_identity!(usize,0usize);impl_bitxor_identity!(u8,0u8);impl_bitxor_identity!(u16,0u16);impl_bitxor_identity!(u32,0u32);impl_bitxor_identity!(u64,0u64);impl_bitxor_identity!(isize,0isize);impl_bitxor_identity!(i8,0i8);impl_bitxor_identity!(i16,0i16);impl_bitxor_identity!(i32,0i32);impl_bitxor_identity!(i64,0i64);impl<T:Clone+BitXorIdentity>Magma for BitXorOperation<T>{type T=T;#[inline]fn operate(x:&Self::T,y:&Self::T)->Self::T{x.clone()^y.clone()}}impl<T:Clone+BitXorIdentity>Unital for BitXorOperation<T>{#[inline]fn unit()->Self::T{BitXorIdentity::xor_zero()}}impl<T:Clone+BitXorIdentity>Associative for BitXorOperation<T>{}impl<T:Clone+BitXorIdentity>Commutative for BitXorOperation<T>{}impl<T:Clone+BitXorIdentity>Invertible for BitXorOperation<T>{fn inverse(x:&Self::T)->Self::T{x.clone()}}}
mod magma{#![doc=" algebraic traits"]#[doc=" binary operaion: $T \\circ T \\to T$"]pub trait Magma{#[doc=" type of operands: $T$"]type T:Clone;#[doc=" binary operaion: $\\circ$"]fn operate(x:&Self::T,y:&Self::T)->Self::T;#[inline]fn reverse_operate(x:&Self::T,y:&Self::T)->Self::T{Self::operate(y,x)}#[inline]fn operate_assign(x:&mut Self::T,y:&Self::T){*x=Self::operate(x,y);}}#[doc=" $\\forall a,\\forall b,\\forall c \\in T, (a \\circ b) \\circ c = a \\circ (b \\circ c)$"]pub trait Associative{}#[doc=" associative binary operation"]pub trait SemiGroup:Magma+Associative{}impl<S:Magma+Associative>SemiGroup for S{}#[doc=" $\\exists e \\in T, \\forall a \\in T, e \\circ a = a \\circ e = e$"]pub trait Unital:Magma{#[doc=" identity element: $e$"]fn unit()->Self::T;#[inline]fn is_unit(x:&Self::T)->bool where<Self as Magma>::T:PartialEq{x==&Self::unit()}#[inline]fn set_unit(x:&mut Self::T){*x=Self::unit();}}#[doc=" associative binary operation and an identity element"]pub trait Monoid:SemiGroup+Unital{#[doc=" binary exponentiation: $x^n = x\\circ\\ddots\\circ x$"]fn pow(mut x:Self::T,mut n:usize)->Self::T{let mut res=Self::unit();while n>0{if n&1==1{res=Self::operate(&res,&x);}x=Self::operate(&x,&x);n>>=1;}res}}impl<M:SemiGroup+Unital>Monoid for M{}#[doc=" $\\exists e \\in T, \\forall a \\in T, \\exists b,c \\in T, b \\circ a = a \\circ c = e$"]pub trait Invertible:Magma{#[doc=" $a$ where $a \\circ x = e$"]fn inverse(x:&Self::T)->Self::T;#[inline]fn rinv_operate(x:&Self::T,y:&Self::T)->Self::T{Self::operate(x,&Self::inverse(y))}}#[doc=" associative binary operation and an identity element and inverse elements"]pub trait Group:Monoid+Invertible{}impl<G:Monoid+Invertible>Group for G{}#[doc=" $\\forall a,\\forall b \\in T, a \\circ b = b \\circ a$"]pub trait Commutative{}#[doc=" commutative monoid"]pub trait AbelianMonoid:Monoid+Commutative{}impl<M:Monoid+Commutative>AbelianMonoid for M{}#[doc=" commutative group"]pub trait AbelianGroup:Group+Commutative{}impl<G:Group+Commutative>AbelianGroup for G{}#[doc=" $\\forall a \\in T, a \\circ a = a$"]pub trait Idempotent{}#[doc=" idempotent monoid"]pub trait IdempotentMonoid:Monoid+Idempotent{}impl<M:Monoid+Idempotent>IdempotentMonoid for M{}#[macro_export]macro_rules!monoid_fold{($m:ty)=>{<$m as Unital>::unit()};($m:ty,)=>{<$m as Unital>::unit()};($m:ty,$f:expr)=>{$f};($m:ty,$f:expr,$($ff:expr),*)=>{<$m as Magma>::operate(&($f),&monoid_fold!($m,$($ff),*))};}}
pub use self::magma::*;
pub use self::segment_tree::SegmentTree;
mod segment_tree{use super::{AbelianMonoid,Monoid};#[derive(Clone,Debug)]pub struct SegmentTree<M>where M:Monoid{n:usize,seg:Vec<M::T>}impl<M>SegmentTree<M>where M:Monoid{pub fn new(n:usize)->Self{let seg=vec![M::unit();2*n];Self{n,seg}}pub fn from_vec(v:Vec<M::T>)->Self{let n=v.len();let mut seg=vec![M::unit();2*n];for(i,x)in v.into_iter().enumerate(){seg[n+i]=x;}for i in(1..n).rev(){seg[i]=M::operate(&seg[2*i],&seg[2*i+1]);}Self{n,seg}}pub fn set(&mut self,k:usize,x:M::T){debug_assert!(k<self.n);let mut k=k+self.n;self.seg[k]=x;k/=2;while k>0{self.seg[k]=M::operate(&self.seg[2*k],&self.seg[2*k+1]);k/=2;}}pub fn update(&mut self,k:usize,x:M::T){debug_assert!(k<self.n);let mut k=k+self.n;self.seg[k]=M::operate(&self.seg[k],&x);k/=2;while k>0{self.seg[k]=M::operate(&self.seg[2*k],&self.seg[2*k+1]);k/=2;}}pub fn get(&self,k:usize)->M::T{debug_assert!(k<self.n);self.seg[k+self.n].clone()}pub fn fold(&self,l:usize,r:usize)->M::T{debug_assert!(r<=self.n);debug_assert!(l<=r);let mut l=l+self.n;let mut r=r+self.n;let mut vl=M::unit();let mut vr=M::unit();while l<r{if l&1!=0{vl=M::operate(&vl,&self.seg[l]);l+=1;}if r&1!=0{r-=1;vr=M::operate(&self.seg[r],&vr);}l/=2;r/=2;}M::operate(&vl,&vr)}fn bisect_perfect<F>(&self,mut pos:usize,mut acc:M::T,f:F)->(usize,M::T)where F:Fn(&M::T)->bool{while pos<self.n{pos<<=1;let nacc=M::operate(&acc,&self.seg[pos]);if!f(&nacc){acc=nacc;pos+=1;}}(pos-self.n,acc)}fn rbisect_perfect<F>(&self,mut pos:usize,mut acc:M::T,f:F)->(usize,M::T)where F:Fn(&M::T)->bool{while pos<self.n{pos=pos*2+1;let nacc=M::operate(&self.seg[pos],&acc);if!f(&nacc){acc=nacc;pos-=1;}}(pos-self.n,acc)}#[doc=" Returns the first index that satisfies a accumlative predicate."]pub fn position_acc<F>(&self,l:usize,r:usize,f:F)->Option<usize>where F:Fn(&M::T)->bool{let mut l=l+self.n;let r=r+self.n;let mut k=0usize;let mut acc=M::unit();while l<r>>k{if l&1!=0{let nacc=M::operate(&acc,&self.seg[l]);if f(&nacc){return Some(self.bisect_perfect(l,acc,f).0);}acc=nacc;l+=1;}l>>=1;k+=1;}for k in(0..k).rev(){let r=r>>k;if r&1!=0{let nacc=M::operate(&acc,&self.seg[r-1]);if f(&nacc){return Some(self.bisect_perfect(r-1,acc,f).0);}acc=nacc;}}None}#[doc=" Returns the last index that satisfies a accumlative predicate."]pub fn rposition_acc<F>(&self,l:usize,r:usize,f:F)->Option<usize>where F:Fn(&M::T)->bool{let mut l=l+self.n;let mut r=r+self.n;let mut c=0usize;let mut k=0usize;let mut acc=M::unit();while l>>k<r{c<<=1;if l&1<<k!=0{l+=1<<k;c+=1;}if r&1!=0{r-=1;let nacc=M::operate(&self.seg[r],&acc);if f(&nacc){return Some(self.rbisect_perfect(r,acc,f).0);}acc=nacc;}r>>=1;k+=1;}for k in(0..k).rev(){if c&1!=0{l-=1<<k;let l=l>>k;let nacc=M::operate(&self.seg[l],&acc);if f(&nacc){return Some(self.rbisect_perfect(l,acc,f).0);}acc=nacc;}c>>=1;}None}pub fn as_slice(&self)->&[M::T]{&self.seg[self.n..]}}impl<M>SegmentTree<M>where M:AbelianMonoid{pub fn fold_all(&self)->M::T{self.seg[1].clone()}}}
impl<D>SparseGraph<D>{#[doc=" (order, parents)"]pub fn tree_order(&self,root:usize)->(Vec<usize>,Vec<usize>){let n=self.vertices_size();let mut order=Vec::with_capacity(n);let mut parents=vec![!0usize;n];let mut stack=Vec::with_capacity(n);stack.push(root);while let Some(u)=stack.pop(){order.push(u);for a in self.adjacencies(u).rev(){if a.to!=parents[u]{parents[a.to]=u;stack.push(a.to);}}}(order,parents)}}
mod capture{#[doc=" Macro that returns a recursive function that automatically captures references"]#[doc=" and semi-automatically captures mutable references."]#[doc=""]#[doc=" # Example"]#[doc=" ```"]#[doc=" # use competitive::crecurse;"]#[doc=" let mut res = 0usize;"]#[doc=" let coeff = 3usize;"]#[doc=" crecurse!("]#[doc=" // (1) semi-automatically capture mutable reference (res: &mut usize)"]#[doc=" [res: usize],"]#[doc=" fn mul(x: usize, y: usize) {"]#[doc=" if y > 0 {"]#[doc=" if y % 2 == 1 {"]#[doc=" // (2) automatically capture reference (coeff: &usize)"]#[doc=" *res += coeff * x;"]#[doc=" }"]#[doc=" // (3) call macro to recurse"]#[doc=" mul!(x + x, y / 2);"]#[doc=" }"]#[doc=" }"]#[doc=" )(10, 19); // (4) macro returns captured version of the recursive function"]#[doc=" assert_eq!(res, coeff * 10 * 19);"]#[doc=" ```"]#[doc=""]#[doc=" # Syntax"]#[doc=" ```txt"]#[doc=" crecurse!("]#[doc=" ([($ident: $type),*,?],)?"]#[doc=" fn $ident\\(($ident: $type),*,?\\) (-> $type)? $block"]#[doc=" )"]#[doc=" ```"]#[macro_export]macro_rules!crecurse{(@macro_def($dol:tt)$name:ident$($cargs:ident)*)=>{#[allow(unused_macros)]macro_rules!$name{($dol($dol args:expr),*)=>{$name($dol($dol args,)*$($cargs,)*)}}};(@inner[$($cargs:ident:$cargsty:ty),*$(,)?],fn$func:ident($($args:ident:$argsty:ty),*$(,)?)->$ret:ty$body:block)=>{{fn call<F>(f:&F,$($args:$argsty,)*$($cargs:&mut$cargsty,)*)->$ret where F:Fn(&dyn Fn($($argsty,)*$(&mut$cargsty,)*)->$ret,$($argsty,)*$(&mut$cargsty,)*)->$ret,{f(&|$($args:$argsty,)*$($cargs:&mut$cargsty,)*|->$ret{call(f,$($args,)*$($cargs,)*)},$($args,)*$($cargs,)*)}|$($args:$argsty,)*|->$ret{call(&|$func,$($args:$argsty,)*$($cargs:&mut$cargsty,)*|->$ret{$crate::crecurse!(@macro_def($)$func$($cargs)*);$body},$($args,)*$(&mut$cargs,)*)}}};(@inner[$($caps:tt)*],fn$func:ident($($argstt:tt)*)$($rest:tt)*)=>{$crate::crecurse!(@inner[$($caps)*],fn$func($($argstt)*)->()$($rest)*)};($([$($caps:tt)*],)?fn$func:ident($($args:ident:$argsty:ty),*$(,)?)$($rest:tt)*)=>{$crate::crecurse!(@inner[$($($caps)*)?],fn$func($($args:$argsty),*)$($rest)*)}}#[doc=" Automatic memorization for recursive functions."]#[doc=""]#[doc=" This macro binds memorized version of the recursive functions to a local variable."]#[doc=" The specification of the function declaration part is the same as [`crecurse`]."]#[doc=""]#[doc=" [`crecurse`]: crate::crecurse"]#[doc=""]#[doc=" # Example"]#[doc=" ```"]#[doc=" # use competitive::memorize;"]#[doc=" memorize!("]#[doc=" fn comb(n: usize, r: usize) -> usize {"]#[doc=" if r > n {"]#[doc=" 0"]#[doc=" } else if r == 0 || r == n {"]#[doc=" 1"]#[doc=" } else {"]#[doc=" comb!(n - 1, r) + comb!(n - 1, r - 1)"]#[doc=" }"]#[doc=" }"]#[doc=" );"]#[doc=" assert_eq!(comb(30, 12), 86493225);"]#[doc=" ```"]#[macro_export]macro_rules!memorize{(@inner[$map:ident,$Map:ty,$init:expr]fn$name:ident($($args:ident:$argsty:ty),*$(,)?)->$ret:ty$body:block)=>{let mut$map:$Map=$init;#[allow(unused_mut)]let mut$name=$crate::crecurse!([$map:$Map],fn$name($($args:$argsty),*)->$ret{if let Some(value)=$map.get(&($($args,)*)).cloned(){value}else{let value=(||$body)();$map.insert(($($args,)*),value.clone());value}});};(fn$name:ident($($args:ident:$argsty:ty),*$(,)?)->$ret:ty$body:block)=>{$crate::memorize!(@inner[__memorize_map,::std::collections::HashMap<($($argsty,)*),$ret>,::std::default::Default::default()]fn$name($($args:$argsty),*)->$ret$body);}}}