#698235 (Rust) No.1677 mæx

• 問題: No.1677 mæx
• ユーザー: koba-e964
• 提出日時: 2021-09-10 22:15:13
• 言語: Rust (1.77.0)
• 結果: AC
• 実行時間: 16 ms / 2,000 ms
• コード長: 7,521 bytes
• コンパイル時間: 2,113 ms
• コンパイル使用メモリ: 162,552 KB
• 実行使用メモリ: 9,444 KB
• 最終ジャッジ日時: 2023-09-02 18:12:04
• 合計ジャッジ時間: 3,044 ms
• ジャッジサーバーID （参考情報）: judge13 / judge14

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	2 ms; 4,372 KB
testcase_01	AC	1 ms; 4,372 KB
testcase_02	AC	1 ms; 4,372 KB
testcase_03	AC	1 ms; 4,372 KB
testcase_04	AC	15 ms; 7,468 KB
testcase_05	AC	14 ms; 6,604 KB
testcase_06	AC	15 ms; 7,648 KB
testcase_07	AC	15 ms; 7,436 KB
testcase_08	AC	16 ms; 7,468 KB
testcase_09	AC	15 ms; 6,868 KB
testcase_10	AC	15 ms; 7,172 KB
testcase_11	AC	15 ms; 6,864 KB
testcase_12	AC	15 ms; 6,608 KB
testcase_13	AC	15 ms; 7,468 KB
testcase_14	AC	14 ms; 7,220 KB
testcase_15	AC	14 ms; 7,480 KB
testcase_16	AC	14 ms; 7,132 KB
testcase_17	AC	14 ms; 7,388 KB
testcase_18	AC	14 ms; 7,400 KB
testcase_19	AC	1 ms; 4,368 KB
testcase_20	AC	1 ms; 4,368 KB
testcase_21	AC	14 ms; 9,444 KB

ソースコード

use std::cmp::*;
// https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8
macro_rules! input {
    ($($r:tt)*) => {
        let stdin = std::io::stdin();
        let mut bytes = std::io::Read::bytes(std::io::BufReader::new(stdin.lock()));
        let mut next = move || -> String{
            bytes.by_ref().map(|r|r.unwrap() as char)
                .skip_while(|c|c.is_whitespace())
                .take_while(|c|!c.is_whitespace())
                .collect()
        };
        input_inner!{next, $($r)*}
    };
}

macro_rules! input_inner {
    ($next:expr) => {};
    ($next:expr,) => {};
    ($next:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($next, $t);
        input_inner!{$next $($r)*}
    };
}

macro_rules! read_value {
    ($next:expr, ( $($t:tt),* )) => { ($(read_value!($next, $t)),*) };
    ($next:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($next, $t)).collect::<Vec<_>>()
    };
    ($next:expr, chars) => {
        read_value!($next, String).chars().collect::<Vec<char>>()
    };
    ($next:expr, usize1) => (read_value!($next, usize) - 1);
    ($next:expr, [ $t:tt ]) => {{
        let len = read_value!($next, usize);
        read_value!($next, [$t; len])
    }};
    ($next:expr, $t:ty) => ($next().parse::<$t>().expect("Parse error"));
}

/// Verified by https://atcoder.jp/contests/abc198/submissions/21774342
mod mod_int {
    use std::ops::*;
    pub trait Mod: Copy { fn m() -> i64; }
    #[derive(Copy, Clone, Hash, PartialEq, Eq, PartialOrd, Ord)]
    pub struct ModInt<M> { pub x: i64, phantom: ::std::marker::PhantomData<M> }
    impl<M: Mod> ModInt<M> {
        // x >= 0
        pub fn new(x: i64) -> Self { ModInt::new_internal(x % M::m()) }
        fn new_internal(x: i64) -> Self {
            ModInt { x: x, phantom: ::std::marker::PhantomData }
        }
        pub fn pow(self, mut e: i64) -> Self {
            debug_assert!(e >= 0);
            let mut sum = ModInt::new_internal(1);
            let mut cur = self;
            while e > 0 {
                if e % 2 != 0 { sum *= cur; }
                cur *= cur;
                e /= 2;
            }
            sum
        }
        #[allow(dead_code)]
        pub fn inv(self) -> Self { self.pow(M::m() - 2) }
    }
    impl<M: Mod, T: Into<ModInt<M>>> Add<T> for ModInt<M> {
        type Output = Self;
        fn add(self, other: T) -> Self {
            let other = other.into();
            let mut sum = self.x + other.x;
            if sum >= M::m() { sum -= M::m(); }
            ModInt::new_internal(sum)
        }
    }
    impl<M: Mod, T: Into<ModInt<M>>> Sub<T> for ModInt<M> {
        type Output = Self;
        fn sub(self, other: T) -> Self {
            let other = other.into();
            let mut sum = self.x - other.x;
            if sum < 0 { sum += M::m(); }
            ModInt::new_internal(sum)
        }
    }
    impl<M: Mod, T: Into<ModInt<M>>> Mul<T> for ModInt<M> {
        type Output = Self;
        fn mul(self, other: T) -> Self { ModInt::new(self.x * other.into().x % M::m()) }
    }
    impl<M: Mod, T: Into<ModInt<M>>> AddAssign<T> for ModInt<M> {
        fn add_assign(&mut self, other: T) { *self = *self + other; }
    }
    impl<M: Mod, T: Into<ModInt<M>>> SubAssign<T> for ModInt<M> {
        fn sub_assign(&mut self, other: T) { *self = *self - other; }
    }
    impl<M: Mod, T: Into<ModInt<M>>> MulAssign<T> for ModInt<M> {
        fn mul_assign(&mut self, other: T) { *self = *self * other; }
    }
    impl<M: Mod> Neg for ModInt<M> {
        type Output = Self;
        fn neg(self) -> Self { ModInt::new(0) - self }
    }
    impl<M> ::std::fmt::Display for ModInt<M> {
        fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
            self.x.fmt(f)
        }
    }
    impl<M: Mod> ::std::fmt::Debug for ModInt<M> {
        fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
            let (mut a, mut b, _) = red(self.x, M::m());
            if b < 0 {
                a = -a;
                b = -b;
            }
            write!(f, "{}/{}", a, b)
        }
    }
    impl<M: Mod> From<i64> for ModInt<M> {
        fn from(x: i64) -> Self { Self::new(x) }
    }
    // Finds the simplest fraction x/y congruent to r mod p.
    // The return value (x, y, z) satisfies x = y * r + z * p.
    fn red(r: i64, p: i64) -> (i64, i64, i64) {
        if r.abs() <= 10000 {
            return (r, 1, 0);
        }
        let mut nxt_r = p % r;
        let mut q = p / r;
        if 2 * nxt_r >= r {
            nxt_r -= r;
            q += 1;
        }
        if 2 * nxt_r <= -r {
            nxt_r += r;
            q -= 1;
        }
        let (x, z, y) = red(nxt_r, r);
        (x, y - q * z, z)
    }
} // mod mod_int

macro_rules! define_mod {
    ($struct_name: ident, $modulo: expr) => {
        #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
        struct $struct_name {}
        impl mod_int::Mod for $struct_name { fn m() -> i64 { $modulo } }
    }
}
const MOD: i64 = 998_244_353;
define_mod!(P, MOD);
type MInt = mod_int::ModInt<P>;

trait Change { fn chmax(&mut self, x: Self); fn chmin(&mut self, x: Self); }
impl<T: PartialOrd> Change for T {
    fn chmax(&mut self, x: T) { if *self < x { *self = x; } }
    fn chmin(&mut self, x: T) { if *self > x { *self = x; } }
}

fn main() {
    // In order to avoid potential stack overflow, spawn a new thread.
    let stack_size = 104_857_600; // 100 MB
    let thd = std::thread::Builder::new().stack_size(stack_size);
    thd.spawn(|| solve()).unwrap().join().unwrap();
}

enum E {
    I(usize),
    Any,
    Max(Box<E>, Box<E>),
    Mex(Box<E>, Box<E>),
    What(Box<E>, Box<E>),
}

fn prs(s: &[char]) -> (usize, E) {
    if s[0] == 'm' {
        let (p1, e1) = prs(&s[4..]);
        let (p2, e2) = prs(&s[4 + p1 + 1..]);
        let e = match s[1] {
            'a' => E::Max(Box::new(e1), Box::new(e2)),
            'e' => E::Mex(Box::new(e1), Box::new(e2)),
            '?' => E::What(Box::new(e1), Box::new(e2)),
            _ => panic!(),
        };
        return (4 + p1 + 1 + p2 + 1, e);
    }
    (1, match s[0] {
        '0' => E::I(0),
        '1' => E::I(1),
        '2' => E::I(2),
        '?' => E::Any,
        _ => panic!(),
    })
}

fn mex(a: usize, b: usize) -> usize {
    if a != 0 && b != 0 {
        return 0;
    }
    if a + b != 1 {
        return 1;
    }
    2
}

fn dfs(e: &E) -> [MInt; 3] {
    let mut ans = [MInt::new(0); 3];
    match *e {
        E::I(v) => ans[v] += 1,
        E::Any => ans = [MInt::new(1); 3],
        E::Max(ref a, ref b) => {
            let s1 = dfs(a);
            let s2 = dfs(b);
            for i in 0..3 {
                for j in 0..3 {
                    ans[max(i, j)] += s1[i] * s2[j];
                }
            }
        }
        E::Mex(ref a, ref b) => {
            let s1 = dfs(a);
            let s2 = dfs(b);
            for i in 0..3 {
                for j in 0..3 {
                    ans[mex(i, j)] += s1[i] * s2[j];
                }
            }
        }
        E::What(ref a, ref b) => {
            let s1 = dfs(a);
            let s2 = dfs(b);
            for i in 0..3 {
                for j in 0..3 {
                    ans[max(i, j)] += s1[i] * s2[j];
                    ans[mex(i, j)] += s1[i] * s2[j];
                }
            }
        }
    }
    ans
}

fn solve() {
    input! {
        s: chars,
        k: usize,
    }
    let (_, e) = prs(&s);
    let v = dfs(&e);
    println!("{}", v[k]);
}