#652806 (Rust) No.1493 隣接xor

• 問題: No.1493 隣接xor
• ユーザー: to-omer
• 提出日時: 2021-04-30 22:37:20
• 言語: Rust (1.77.0 + proconio)
• 結果: AC
• 実行時間: 24 ms / 2,000 ms
• コード長: 27,670 bytes
• コンパイル時間: 13,105 ms
• コンパイル使用メモリ: 377,444 KB
• 実行使用メモリ: 12,104 KB
• 最終ジャッジ日時: 2024-07-19 02:18:35
• 合計ジャッジ時間: 14,465 ms
• ジャッジサーバーID （参考情報）: judge1 / judge3

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; 5,376 KB
testcase_02	AC	0 ms; 5,376 KB
testcase_03	AC	24 ms; 12,012 KB
testcase_04	AC	22 ms; 12,096 KB
testcase_05	AC	21 ms; 12,104 KB
testcase_06	AC	22 ms; 11,976 KB
testcase_07	AC	23 ms; 12,096 KB
testcase_08	AC	22 ms; 12,100 KB
testcase_09	AC	22 ms; 12,100 KB
testcase_10	AC	23 ms; 12,100 KB
testcase_11	AC	22 ms; 11,984 KB
testcase_12	AC	22 ms; 12,100 KB
testcase_13	AC	12 ms; 5,632 KB
testcase_14	AC	8 ms; 5,376 KB
testcase_15	AC	0 ms; 5,376 KB
testcase_16	AC	0 ms; 5,376 KB
testcase_17	AC	1 ms; 5,376 KB
testcase_18	AC	1 ms; 5,376 KB
testcase_19	AC	1 ms; 5,376 KB
testcase_20	AC	13 ms; 7,132 KB
testcase_21	AC	17 ms; 10,644 KB
testcase_22	AC	10 ms; 6,768 KB
testcase_23	AC	12 ms; 7,168 KB
testcase_24	AC	21 ms; 11,956 KB
testcase_25	AC	10 ms; 6,716 KB
testcase_26	AC	17 ms; 10,772 KB
testcase_27	AC	6 ms; 5,376 KB
testcase_28	AC	21 ms; 11,744 KB
testcase_29	AC	17 ms; 10,868 KB

ソースコード

// codesnip-guard: main
fn main() {
    #![allow(unused_imports, unused_macros)]
    prepare_io!(_in_buf, scanner, _out);
    macro_rules ! print { ($ ($ arg : tt) *) => (:: std :: write ! (_out , $ ($ arg) *) . expect ("io error")) }
    macro_rules ! println { ($ ($ arg : tt) *) => (:: std :: writeln ! (_out , $ ($ arg) *) . expect ("io error")) }
    scan!(scanner, n, a: [u32; n]);
    let mut dp = vec![M::zero(); n];
    let mut mp = std::collections::HashMap::<u32, usize>::new();
    mp.insert(a[0], 0);
    dp[0] = M::one();
    let mut tot = M::one();
    let mut acc = a[0];
    for i in 1..n {
        acc ^= a[i];
        tot += dp[i - 1];
        dp[i] += tot;
        if let Some(&x) = mp.get(&acc) {
            tot -= dp[x];
        }
        mp.entry(acc).or_default().chmax(i);
    }
    println!("{}", dp[n - 1]);
}
pub type M = mint_basic::MInt1000000007;
#[macro_export]
macro_rules! prepare_io {
    ($ in_buf : ident , $ scanner : ident , $ out : ident) => {
        use std::io::{stdout, BufWriter, Write as _};
        let $in_buf = read_stdin_all_unchecked();
        let mut $scanner = Scanner::new(&$in_buf);
        let $out = stdout();
        let mut $out = BufWriter::new($out.lock());
    };
}
// codesnip-guard: _echo
pub fn echo<T: std::fmt::Display>(
    mut writer: impl std::io::Write,
    iter: impl IntoIterator<Item = T>,
    sep: impl std::fmt::Display,
) -> std::io::Result<()> {
    let mut iter = iter.into_iter();
    if let Some(item) = iter.next() {
        write!(writer, "{}", item)?;
    }
    for item in iter {
        write!(writer, "{}{}", sep, item)?;
    }
    writeln!(writer)
}
// codesnip-guard: scanner
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_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>,
}
mod scanner_impls {
    use super::*;
    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: IterScan>(&mut self) -> <T as IterScan>::Output {
            <T as IterScan>::scan(&mut self.iter).expect("scan error")
        }
        #[inline]
        pub fn mscan<T: MarkedIterScan>(&mut self, marker: T) -> <T as MarkedIterScan>::Output {
            marker.mscan(&mut self.iter).expect("scan error")
        }
        #[inline]
        pub fn scan_vec<T: IterScan>(&mut self, size: usize) -> Vec<<T as IterScan>::Output> {
            (0..size)
                .map(|_| <T as IterScan>::scan(&mut self.iter).expect("scan error"))
                .collect()
        }
        #[inline]
        pub fn iter<'b, T: IterScan>(&'b mut self) -> ScannerIter<'a, 'b, T> {
            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 { ($ ($ 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) ?,) *)) } } } ; }
    iter_scan_tuple_impl!();
    iter_scan_tuple_impl!(A);
    iter_scan_tuple_impl ! (A B);
    iter_scan_tuple_impl ! (A B C);
    iter_scan_tuple_impl ! (A B C D);
    iter_scan_tuple_impl ! (A B C D E);
    iter_scan_tuple_impl ! (A B C D E F);
    iter_scan_tuple_impl ! (A B C D E F G);
    iter_scan_tuple_impl ! (A B C D E F G H);
    iter_scan_tuple_impl ! (A B C D E F G H I);
    iter_scan_tuple_impl ! (A B C D E F G H I J);
    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: IterScan> Iterator for ScannerIter<'a, 'b, T> {
        type Item = <T as IterScan>::Output;
        #[inline]
        fn next(&mut self) -> Option<Self::Item> {
            <T as IterScan>::scan(&mut self.inner.iter)
        }
    }
}
#[derive(Debug, Copy, Clone)]
pub struct Usize1;
#[derive(Debug, Copy, Clone)]
pub struct CharWithBase(pub char);
#[derive(Debug, Copy, Clone)]
pub struct Chars;
#[derive(Debug, Copy, Clone)]
pub struct CharsWithBase(pub char);
#[derive(Debug, Copy, Clone)]
pub struct Collect<T: IterScan, B: std::iter::FromIterator<<T as IterScan>::Output>> {
    size: usize,
    _marker: std::marker::PhantomData<fn() -> (T, B)>,
}
mod marker_impls {
    use super::*;
    use std::{iter::FromIterator, marker::PhantomData};
    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)
        }
    }
    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)
        }
    }
    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())
        }
    }
    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(),
            )
        }
    }
    impl<T: IterScan, B: FromIterator<<T as IterScan>::Output>> Collect<T, B> {
        pub fn new(size: usize) -> Self {
            Self {
                size,
                _marker: PhantomData,
            }
        }
    }
    impl<T: IterScan, B: FromIterator<<T as IterScan>::Output>> MarkedIterScan for Collect<T, B> {
        type Output = B;
        #[inline]
        fn mscan<'a, I: Iterator<Item = &'a str>>(self, iter: &mut I) -> Option<Self::Output> {
            Some(
                (0..self.size)
                    .map(|_| <T as IterScan>::scan(iter).expect("scan error"))
                    .collect::<B>(),
            )
        }
    }
}
#[macro_export]
macro_rules ! scan_value { ($ scanner : expr , ($ ($ t : tt) ,*)) => { ($ ($ crate :: scan_value ! ($ scanner , $ t)) ,*) } ; ($ scanner : expr , [$ t : tt ; $ len : expr]) => { (0 ..$ len) . map (| _ | $ crate :: scan_value ! ($ scanner , $ t)) . collect ::< Vec < _ >> () } ; ($ scanner : expr , [$ t : ty ; $ len : expr]) => { $ scanner . scan_vec ::<$ t > ($ len) } ; ($ scanner : expr , [$ t : ty]) => { $ scanner . iter ::<$ t > () } ; ($ scanner : expr , { $ e : expr }) => { $ scanner . mscan ($ e) } ; ($ scanner : expr , $ t : ty) => { $ scanner . scan ::<$ t > () } ; }
#[macro_export]
macro_rules ! scan { ($ scanner : expr) => { } ; ($ scanner : expr ,) => { } ; ($ scanner : expr , mut $ var : tt : $ t : tt) => { let mut $ var = $ crate :: scan_value ! ($ scanner , $ t) ; } ; ($ scanner : expr , $ var : tt : $ t : tt) => { let $ var = $ crate :: scan_value ! ($ scanner , $ t) ; } ; ($ scanner : expr , mut $ var : tt : $ t : tt , $ ($ rest : tt) *) => { let mut $ var = $ crate :: scan_value ! ($ scanner , $ t) ; scan ! ($ scanner , $ ($ rest) *) } ; ($ scanner : expr , $ var : tt : $ t : tt , $ ($ rest : tt) *) => { let $ var = $ crate :: scan_value ! ($ scanner , $ t) ; scan ! ($ scanner , $ ($ rest) *) } ; ($ scanner : expr , mut $ var : tt) => { let mut $ var = $ crate :: scan_value ! ($ scanner , usize) ; } ; ($ scanner : expr , $ var : tt) => { let $ var = $ crate :: scan_value ! ($ scanner , usize) ; } ; ($ scanner : expr , mut $ var : tt , $ ($ rest : tt) *) => { let mut $ var = $ crate :: scan_value ! ($ scanner , usize) ; scan ! ($ scanner , $ ($ rest) *) } ; ($ scanner : expr , $ var : tt , $ ($ rest : tt) *) => { let $ var = $ crate :: scan_value ! ($ scanner , usize) ; scan ! ($ scanner , $ ($ rest) *) } ; }
// codesnip-guard: MInt
pub mod mint_basic {
    use super::*;
    #[macro_export]
    macro_rules ! define_basic_mintbase { ($ name : ident , $ m : expr , $ basety : ty , $ signedty : ty , $ upperty : ty , [$ ($ unsigned : ty) ,*] , [$ ($ signed : ty) ,*]) => { pub struct $ name ; impl MIntBase for $ name { type Inner = $ basety ; # [inline] fn get_mod () -> Self :: Inner { $ m } # [inline] fn mod_zero () -> Self :: Inner { 0 } # [inline] fn mod_one () -> Self :: Inner { 1 } # [inline] fn mod_add (x : Self :: Inner , y : Self :: Inner) -> Self :: Inner { let z = x + y ; let m = Self :: get_mod () ; if z >= m { z - m } else { z } } # [inline] fn mod_sub (x : Self :: Inner , y : Self :: Inner) -> Self :: Inner { if x < y { x + Self :: get_mod () - y } else { x - y } } # [inline] fn mod_mul (x : Self :: Inner , y : Self :: Inner) -> Self :: Inner { (x as $ upperty * y as $ upperty % Self :: get_mod () as $ upperty) as $ basety } # [inline] fn mod_div (x : Self :: Inner , y : Self :: Inner) -> Self :: Inner { Self :: mod_mul (x , Self :: mod_inv (y)) } # [inline] fn mod_neg (x : Self :: Inner) -> Self :: Inner { if x == 0 { 0 } else { Self :: get_mod () - x } } fn mod_inv (x : Self :: Inner) -> Self :: Inner { let p = Self :: get_mod () as $ signedty ; let (mut a , mut b) = (x as $ signedty , p) ; let (mut u , mut x) = (1 , 0) ; while a != 0 { let k = b / a ; x -= k * u ; b -= k * a ; std :: mem :: swap (& mut x , & mut u) ; std :: mem :: swap (& mut b , & mut a) ; } (if x < 0 { x + p } else { x }) as _ } } $ (impl MIntConvert <$ unsigned > for $ name { # [inline] fn from (x : $ unsigned) -> Self :: Inner { (x % < Self as MIntBase >:: get_mod () as $ unsigned) as $ basety } # [inline] fn into (x : Self :: Inner) -> $ unsigned { x as $ unsigned } # [inline] fn mod_into () -> $ unsigned { < Self as MIntBase >:: get_mod () as $ unsigned } }) * $ (impl MIntConvert <$ signed > for $ name { # [inline] fn from (x : $ signed) -> Self :: Inner { let x = x % < Self as MIntBase >:: get_mod () as $ signed ; if x < 0 { (x + < Self as MIntBase >:: get_mod () as $ signed) as $ basety } else { x as $ basety } } # [inline] fn into (x : Self :: Inner) -> $ signed { x as $ signed } # [inline] fn mod_into () -> $ signed { < Self as MIntBase >:: get_mod () as $ signed } }) * } ; }
    #[macro_export]
    macro_rules ! define_basic_mint32 { ($ ([$ name : ident , $ m : expr , $ mint_name : ident]) ,*) => { $ (crate :: define_basic_mintbase ! ($ name , $ m , u32 , i32 , u64 , [u32 , u64 , u128 , usize] , [i32 , i64 , i128 , isize]) ; pub type $ mint_name = MInt <$ name >;) * } ; }
    define_basic_mint32!(
        [Modulo998244353, 998_244_353, MInt998244353],
        [Modulo1000000007, 1_000_000_007, MInt1000000007],
        [Modulo1000000009, 1_000_000_009, MInt1000000009],
        [
            DynModuloU32,
            DYN_MODULUS_U32.with(|cell| unsafe { *cell.get() }),
            DynMIntU32
        ]
    );
    thread_local ! (static DYN_MODULUS_U32 : std :: cell :: UnsafeCell < u32 > = std :: cell :: UnsafeCell :: new (1_000_000_007));
    impl DynModuloU32 {
        pub fn set_mod(m: u32) {
            DYN_MODULUS_U32.with(|cell| unsafe { *cell.get() = m })
        }
    }
    thread_local ! (static DYN_MODULUS_U64 : std :: cell :: UnsafeCell < u64 > = std :: cell :: UnsafeCell :: new (1_000_000_007));
    define_basic_mintbase!(
        DynModuloU64,
        DYN_MODULUS_U64.with(|cell| unsafe { *cell.get() }),
        u64,
        i64,
        u128,
        [u64, u128, usize],
        [i64, i128, isize]
    );
    impl DynModuloU64 {
        pub fn set_mod(m: u64) {
            DYN_MODULUS_U64.with(|cell| unsafe { *cell.get() = m })
        }
    }
    pub type DynMIntU64 = MInt<DynModuloU64>;
    pub struct Modulo2;
    impl MIntBase for Modulo2 {
        type Inner = u32;
        #[inline]
        fn get_mod() -> Self::Inner {
            2
        }
        #[inline]
        fn mod_zero() -> Self::Inner {
            0
        }
        #[inline]
        fn mod_one() -> Self::Inner {
            1
        }
        #[inline]
        fn mod_add(x: Self::Inner, y: Self::Inner) -> Self::Inner {
            x ^ y
        }
        #[inline]
        fn mod_sub(x: Self::Inner, y: Self::Inner) -> Self::Inner {
            x ^ y
        }
        #[inline]
        fn mod_mul(x: Self::Inner, y: Self::Inner) -> Self::Inner {
            x | y
        }
        #[inline]
        fn mod_div(x: Self::Inner, y: Self::Inner) -> Self::Inner {
            assert_ne!(y, 0);
            x
        }
        #[inline]
        fn mod_neg(x: Self::Inner) -> Self::Inner {
            x
        }
        #[inline]
        fn mod_inv(x: Self::Inner) -> Self::Inner {
            assert_ne!(x, 0);
            x
        }
        #[inline]
        fn mod_pow(x: Self::Inner, y: usize) -> Self::Inner {
            if y == 0 {
                1
            } else {
                x
            }
        }
    }
    macro_rules ! impl_to_mint_base_for_modulo2 { ($ name : ident , $ basety : ty , [$ ($ t : ty) ,*]) => { $ (impl MIntConvert <$ t > for $ name { # [inline] fn from (x : $ t) -> Self :: Inner { (x & 1) as $ basety } # [inline] fn into (x : Self :: Inner) -> $ t { x as $ t } # [inline] fn mod_into () -> $ t { 1 } }) * } ; }
    impl_to_mint_base_for_modulo2!(
        Modulo2,
        u32,
        [u8, u16, u32, u64, u128, usize, i8, i16, i32, i64, i128, isize]
    );
    pub type MInt2 = MInt<Modulo2>;
}
// codesnip-guard: MIntBase
#[repr(transparent)]
pub struct MInt<M>
where
    M: MIntBase,
{
    x: M::Inner,
    _marker: std::marker::PhantomData<fn() -> M>,
}
pub trait MIntBase {
    type Inner: Sized + Copy + Eq + std::fmt::Debug + std::hash::Hash;
    fn get_mod() -> Self::Inner;
    fn mod_zero() -> Self::Inner;
    fn mod_one() -> Self::Inner;
    fn mod_add(x: Self::Inner, y: Self::Inner) -> Self::Inner;
    fn mod_sub(x: Self::Inner, y: Self::Inner) -> Self::Inner;
    fn mod_mul(x: Self::Inner, y: Self::Inner) -> Self::Inner;
    fn mod_div(x: Self::Inner, y: Self::Inner) -> Self::Inner;
    fn mod_neg(x: Self::Inner) -> Self::Inner;
    fn mod_inv(x: Self::Inner) -> Self::Inner;
    fn mod_pow(x: Self::Inner, y: usize) -> Self::Inner {
        let (mut x, mut y, mut z) = (x, y, Self::mod_one());
        while y > 0 {
            if y & 1 == 1 {
                z = Self::mod_mul(z, x);
            }
            x = Self::mod_mul(x, x);
            y >>= 1;
        }
        z
    }
}
pub trait MIntConvert<T = <Self as MIntBase>::Inner>: MIntBase {
    fn from(x: T) -> <Self as MIntBase>::Inner;
    fn into(x: <Self as MIntBase>::Inner) -> T;
    fn mod_into() -> T;
}
mod mint_base {
    use super::*;
    use std::{
        fmt::{self, Debug, Display},
        hash::{Hash, Hasher},
        iter::{Product, Sum},
        marker::PhantomData,
        ops::{Add, AddAssign, Div, DivAssign, Mul, MulAssign, Neg, Sub, SubAssign},
        str::FromStr,
    };
    impl<M> MInt<M>
    where
        M: MIntConvert,
    {
        #[inline]
        pub fn new(x: M::Inner) -> Self {
            Self::new_unchecked(<M as MIntConvert<M::Inner>>::from(x))
        }
        #[inline]
        pub fn inner(self) -> M::Inner {
            <M as MIntConvert<M::Inner>>::into(self.x)
        }
    }
    impl<M> MInt<M>
    where
        M: MIntBase,
    {
        #[inline]
        pub fn new_unchecked(x: M::Inner) -> Self {
            Self {
                x,
                _marker: PhantomData,
            }
        }
        #[inline]
        pub fn get_mod() -> M::Inner {
            M::get_mod()
        }
        #[inline]
        pub fn pow(self, y: usize) -> Self {
            Self::new_unchecked(M::mod_pow(self.x, y))
        }
        #[inline]
        pub fn inv(self) -> Self {
            Self::new_unchecked(M::mod_inv(self.x))
        }
    }
    impl<M> Clone for MInt<M>
    where
        M: MIntBase,
    {
        #[inline]
        fn clone(&self) -> Self {
            Self {
                x: Clone::clone(&self.x),
                _marker: PhantomData,
            }
        }
    }
    impl<M> Copy for MInt<M> where M: MIntBase {}
    impl<M> Debug for MInt<M>
    where
        M: MIntBase,
    {
        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
            Debug::fmt(&self.x, f)
        }
    }
    impl<M> Default for MInt<M>
    where
        M: MIntBase,
    {
        #[inline]
        fn default() -> Self {
            <Self as Zero>::zero()
        }
    }
    impl<M> PartialEq for MInt<M>
    where
        M: MIntBase,
    {
        #[inline]
        fn eq(&self, other: &Self) -> bool {
            PartialEq::eq(&self.x, &other.x)
        }
    }
    impl<M> Eq for MInt<M> where M: MIntBase {}
    impl<M> Hash for MInt<M>
    where
        M: MIntBase,
    {
        #[inline]
        fn hash<H: Hasher>(&self, state: &mut H) {
            Hash::hash(&self.x, state)
        }
    }
    macro_rules ! impl_mint_from { ($ ($ t : ty) ,*) => { $ (impl < M > From <$ t > for MInt < M > where M : MIntConvert <$ t >, { # [inline] fn from (x : $ t) -> Self { Self :: new_unchecked (< M as MIntConvert <$ t >>:: from (x)) } } impl < M > From < MInt < M >> for $ t where M : MIntConvert <$ t >, { # [inline] fn from (x : MInt < M >) -> $ t { < M as MIntConvert <$ t >>:: into (x . x) } }) * } ; }
    impl_mint_from!(u8, u16, u32, u64, u128, usize, i8, i16, i32, i64, i128, isize);
    impl<M> Zero for MInt<M>
    where
        M: MIntBase,
    {
        #[inline]
        fn zero() -> Self {
            Self::new_unchecked(M::mod_zero())
        }
    }
    impl<M> One for MInt<M>
    where
        M: MIntBase,
    {
        #[inline]
        fn one() -> Self {
            Self::new_unchecked(M::mod_one())
        }
    }
    impl<M> Add for MInt<M>
    where
        M: MIntBase,
    {
        type Output = Self;
        #[inline]
        fn add(self, rhs: Self) -> Self::Output {
            Self::new_unchecked(M::mod_add(self.x, rhs.x))
        }
    }
    impl<M> Sub for MInt<M>
    where
        M: MIntBase,
    {
        type Output = Self;
        #[inline]
        fn sub(self, rhs: Self) -> Self::Output {
            Self::new_unchecked(M::mod_sub(self.x, rhs.x))
        }
    }
    impl<M> Mul for MInt<M>
    where
        M: MIntBase,
    {
        type Output = Self;
        #[inline]
        fn mul(self, rhs: Self) -> Self::Output {
            Self::new_unchecked(M::mod_mul(self.x, rhs.x))
        }
    }
    impl<M> Div for MInt<M>
    where
        M: MIntBase,
    {
        type Output = Self;
        #[inline]
        fn div(self, rhs: Self) -> Self::Output {
            Self::new_unchecked(M::mod_div(self.x, rhs.x))
        }
    }
    impl<M> Neg for MInt<M>
    where
        M: MIntBase,
    {
        type Output = Self;
        #[inline]
        fn neg(self) -> Self::Output {
            Self::new_unchecked(M::mod_neg(self.x))
        }
    }
    impl<M> Sum for MInt<M>
    where
        M: MIntBase,
    {
        #[inline]
        fn sum<I: Iterator<Item = Self>>(iter: I) -> Self {
            iter.fold(<Self as Zero>::zero(), Add::add)
        }
    }
    impl<M> Product for MInt<M>
    where
        M: MIntBase,
    {
        #[inline]
        fn product<I: Iterator<Item = Self>>(iter: I) -> Self {
            iter.fold(<Self as One>::one(), Mul::mul)
        }
    }
    impl<'a, M: 'a> Sum<&'a MInt<M>> for MInt<M>
    where
        M: MIntBase,
    {
        #[inline]
        fn sum<I: Iterator<Item = &'a Self>>(iter: I) -> Self {
            iter.fold(<Self as Zero>::zero(), Add::add)
        }
    }
    impl<'a, M: 'a> Product<&'a MInt<M>> for MInt<M>
    where
        M: MIntBase,
    {
        #[inline]
        fn product<I: Iterator<Item = &'a Self>>(iter: I) -> Self {
            iter.fold(<Self as One>::one(), Mul::mul)
        }
    }
    impl<M> Display for MInt<M>
    where
        M: MIntConvert,
        M::Inner: Display,
    {
        fn fmt<'a>(&self, f: &mut fmt::Formatter<'a>) -> Result<(), fmt::Error> {
            write!(f, "{}", self.inner())
        }
    }
    impl<M> FromStr for MInt<M>
    where
        M: MIntConvert,
        M::Inner: FromStr,
    {
        type Err = <M::Inner as FromStr>::Err;
        #[inline]
        fn from_str(s: &str) -> Result<Self, Self::Err> {
            s.parse::<M::Inner>().map(Self::new)
        }
    }
    impl<M> IterScan for MInt<M>
    where
        M: MIntConvert,
        M::Inner: FromStr,
    {
        type Output = Self;
        #[inline]
        fn scan<'a, I: Iterator<Item = &'a str>>(iter: &mut I) -> Option<Self::Output> {
            iter.next()?.parse::<MInt<M>>().ok()
        }
    }
    macro_rules! impl_mint_ref_binop {
        ($ imp : ident , $ method : ident , $ t : ty) => {
            impl<M> $imp<$t> for &$t
            where
                M: MIntBase,
            {
                type Output = <$t as $imp<$t>>::Output;
                #[inline]
                fn $method(self, other: $t) -> <$t as $imp<$t>>::Output {
                    $imp::$method(*self, other)
                }
            }
            impl<M> $imp<&$t> for $t
            where
                M: MIntBase,
            {
                type Output = <$t as $imp<$t>>::Output;
                #[inline]
                fn $method(self, other: &$t) -> <$t as $imp<$t>>::Output {
                    $imp::$method(self, *other)
                }
            }
            impl<M> $imp<&$t> for &$t
            where
                M: MIntBase,
            {
                type Output = <$t as $imp<$t>>::Output;
                #[inline]
                fn $method(self, other: &$t) -> <$t as $imp<$t>>::Output {
                    $imp::$method(*self, *other)
                }
            }
        };
    }
    impl_mint_ref_binop!(Add, add, MInt<M>);
    impl_mint_ref_binop!(Sub, sub, MInt<M>);
    impl_mint_ref_binop!(Mul, mul, MInt<M>);
    impl_mint_ref_binop!(Div, div, MInt<M>);
    macro_rules! impl_mint_ref_unop {
        ($ imp : ident , $ method : ident , $ t : ty) => {
            impl<M> $imp for &$t
            where
                M: MIntBase,
            {
                type Output = <$t as $imp>::Output;
                #[inline]
                fn $method(self) -> <$t as $imp>::Output {
                    $imp::$method(*self)
                }
            }
        };
    }
    impl_mint_ref_unop!(Neg, neg, MInt<M>);
    macro_rules! impl_mint_ref_op_assign {
        ($ imp : ident , $ method : ident , $ t : ty , $ fromimp : ident , $ frommethod : ident) => {
            impl<M> $imp<$t> for $t
            where
                M: MIntBase,
            {
                #[inline]
                fn $method(&mut self, rhs: $t) {
                    *self = $fromimp::$frommethod(*self, rhs);
                }
            }
            impl<M> $imp<&$t> for $t
            where
                M: MIntBase,
            {
                #[inline]
                fn $method(&mut self, other: &$t) {
                    $imp::$method(self, *other);
                }
            }
        };
    }
    impl_mint_ref_op_assign!(AddAssign, add_assign, MInt<M>, Add, add);
    impl_mint_ref_op_assign!(SubAssign, sub_assign, MInt<M>, Sub, sub);
    impl_mint_ref_op_assign!(MulAssign, mul_assign, MInt<M>, Mul, mul);
    impl_mint_ref_op_assign!(DivAssign, div_assign, MInt<M>, Div, div);
}
// codesnip-guard: zero_one
pub trait Zero: Sized {
    fn zero() -> Self;
    #[inline]
    fn is_zero(&self) -> bool
    where
        Self: PartialEq,
    {
        self == &Self::zero()
    }
    #[inline]
    fn set_zero(&mut self) {
        *self = Self::zero();
    }
}
pub trait One: Sized {
    fn one() -> Self;
    #[inline]
    fn is_one(&self) -> bool
    where
        Self: PartialEq,
    {
        self == &Self::one()
    }
    #[inline]
    fn set_one(&mut self) {
        *self = Self::one();
    }
}
macro_rules ! zero_one_impls { ($ ({ $ Trait : ident $ method : ident $ ($ t : ty) *, $ e : expr }) *) => { $ ($ (impl $ Trait for $ t { fn $ method () -> Self { $ e } }) *) * } ; }
zero_one_impls ! ({ Zero zero u8 u16 u32 u64 usize i8 i16 i32 i64 isize u128 i128 , 0 } { Zero zero f32 f64 , 0. } { One one u8 u16 u32 u64 usize i8 i16 i32 i64 isize u128 i128 , 1 } { One one f32 f64 , 1. });
// codesnip-guard: ord_tools
pub trait PartialOrdExt: Sized {
    fn chmin(&mut self, other: Self);
    fn chmax(&mut self, other: Self);
    fn minmax(self, other: Self) -> (Self, Self);
}
impl<T> PartialOrdExt for T
where
    T: PartialOrd,
{
    #[inline]
    fn chmin(&mut self, other: Self) {
        if *self > other {
            *self = other;
        }
    }
    #[inline]
    fn chmax(&mut self, other: Self) {
        if *self < other {
            *self = other;
        }
    }
    #[inline]
    fn minmax(self, other: Self) -> (Self, Self) {
        if self < other {
            (self, other)
        } else {
            (other, self)
        }
    }
}
#[macro_export]
macro_rules ! min { ($ l : expr) => { $ l } ; ($ l : expr ,) => { $ crate :: min ! ($ l) } ; ($ l : expr , $ r : expr) => { ($ l) . min ($ r) } ; ($ l : expr , $ r : expr ,) => { $ crate :: min ! ($ l , $ r) } ; ($ l : expr , $ r : expr , $ ($ t : tt) *) => { $ crate :: min ! ($ crate :: min ! ($ l , $ r) , $ ($ t) *) } ; }
#[macro_export]
macro_rules ! chmin { ($ l : expr) => { } ; ($ l : expr ,) => { } ; ($ l : expr , $ r : expr) => { { let r = $ r ; if $ l > r { $ l = r ; } } } ; ($ l : expr , $ r : expr ,) => { $ crate :: chmin ! ($ l , $ r) } ; ($ l : expr , $ r : expr , $ ($ t : tt) *) => { $ crate :: chmin ! ($ l , $ r) ; $ crate :: chmin ! ($ l , $ ($ t) *) } ; }
#[macro_export]
macro_rules ! max { ($ l : expr) => { $ l } ; ($ l : expr ,) => { $ crate :: max ! ($ l) } ; ($ l : expr , $ r : expr) => { ($ l) . max ($ r) } ; ($ l : expr , $ r : expr ,) => { $ crate :: max ! ($ l , $ r) } ; ($ l : expr , $ r : expr , $ ($ t : tt) *) => { $ crate :: max ! ($ crate :: max ! ($ l , $ r) , $ ($ t) *) } ; }
#[macro_export]
macro_rules ! chmax { ($ l : expr) => { } ; ($ l : expr ,) => { } ; ($ l : expr , $ r : expr) => { { let r = $ r ; if $ l < r { $ l = r ; } } } ; ($ l : expr , $ r : expr ,) => { $ crate :: chmax ! ($ l , $ r) } ; ($ l : expr , $ r : expr , $ ($ t : tt) *) => { $ crate :: chmax ! ($ l , $ r) ; $ crate :: chmax ! ($ l , $ ($ t) *) } ; }
#[macro_export]
macro_rules ! minmax { ($ ($ t : tt) *) => { ($ crate :: min ! ($ ($ t) *) , $ crate :: max ! ($ ($ t) *)) } ; }