#712128 (Rust) No.619 CardShuffle

• 問題: No.619 CardShuffle
• ユーザー: koba-e964
• 提出日時: 2021-11-01 10:48:10
• 言語: Rust (1.77.0 + proconio)
• 結果: AC
• 実行時間: 67 ms / 3,000 ms
• コード長: 7,597 bytes
• コンパイル時間: 12,770 ms
• コンパイル使用メモリ: 404,280 KB
• 実行使用メモリ: 8,796 KB
• 最終ジャッジ日時: 2024-10-09 21:41:40
• 合計ジャッジ時間: 16,106 ms
• ジャッジサーバーID （参考情報）: judge5 / judge1

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	1 ms; 6,816 KB
testcase_01	AC	1 ms; 6,820 KB
testcase_02	AC	1 ms; 6,816 KB
testcase_03	AC	1 ms; 6,816 KB
testcase_04	AC	1 ms; 6,820 KB
testcase_05	AC	1 ms; 6,816 KB
testcase_06	AC	1 ms; 6,820 KB
testcase_07	AC	1 ms; 6,816 KB
testcase_08	AC	1 ms; 6,820 KB
testcase_09	AC	1 ms; 6,820 KB
testcase_10	AC	1 ms; 6,816 KB
testcase_11	AC	1 ms; 6,820 KB
testcase_12	AC	1 ms; 6,820 KB
testcase_13	AC	1 ms; 6,816 KB
testcase_14	AC	1 ms; 6,816 KB
testcase_15	AC	1 ms; 6,816 KB
testcase_16	AC	66 ms; 8,672 KB
testcase_17	AC	67 ms; 8,768 KB
testcase_18	AC	67 ms; 8,796 KB
testcase_19	AC	63 ms; 8,772 KB
testcase_20	AC	60 ms; 8,744 KB
testcase_21	AC	65 ms; 8,748 KB
testcase_22	AC	60 ms; 8,540 KB
testcase_23	AC	64 ms; 8,676 KB
testcase_24	AC	60 ms; 8,720 KB
testcase_25	AC	60 ms; 8,656 KB
testcase_26	AC	66 ms; 8,684 KB
testcase_27	AC	61 ms; 8,764 KB
testcase_28	AC	62 ms; 8,696 KB
testcase_29	AC	63 ms; 8,660 KB
testcase_30	AC	58 ms; 8,716 KB
testcase_31	AC	1 ms; 6,816 KB
testcase_32	AC	61 ms; 8,756 KB
testcase_33	AC	64 ms; 8,616 KB
testcase_34	AC	56 ms; 8,656 KB
testcase_35	AC	25 ms; 6,816 KB

ソースコード

use std::io::{Write, BufWriter};
// 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, usize1) => (read_value!($next, usize) - 1);
    ($next:expr, $t:ty) => ($next().parse::<$t>().expect("Parse error"));
}

/**
 * Segment Tree. This data structure is useful for fast folding on intervals of an array
 * whose elements are elements of monoid I. Note that constructing this tree requires the identity
 * element of I and the operation of I.
 * Verified by: yukicoder No. 259 (http://yukicoder.me/submissions/100581)
 *              AGC015-E (http://agc015.contest.atcoder.jp/submissions/1461001)
 *              yukicoder No. 833 (https://yukicoder.me/submissions/703521)
 */
struct SegTree<I, BiOp> {
    n: usize,
    dat: Vec<I>,
    op: BiOp,
    e: I,
}

impl<I, BiOp> SegTree<I, BiOp>
    where BiOp: Fn(I, I) -> I,
          I: Copy {
    pub fn new(n_: usize, op: BiOp, e: I) -> Self {
        let mut n = 1;
        while n < n_ { n *= 2; } // n is a power of 2
        SegTree {n: n, dat: vec![e; 2 * n - 1], op: op, e: e}
    }
    /* ary[k] <- v */
    pub fn update(&mut self, idx: usize, v: I) {
        let mut k = idx + self.n - 1;
        self.dat[k] = v;
        while k > 0 {
            k = (k - 1) / 2;
            self.dat[k] = (self.op)(self.dat[2 * k + 1], self.dat[2 * k + 2]);
        }
    }
    /* [a, b) (note: half-inclusive)
     * http://proc-cpuinfo.fixstars.com/2017/07/optimize-segment-tree/ */
    #[allow(unused)]
    pub fn query(&self, mut a: usize, mut b: usize) -> I {
        let mut left = self.e;
        let mut right = self.e;
        a += self.n - 1;
        b += self.n - 1;
        while a < b {
            if (a & 1) == 0 {
                left = (self.op)(left, self.dat[a]);
            }
            if (b & 1) == 0 {
                right = (self.op)(self.dat[b - 1], right);
            }
            a = a / 2;
            b = (b - 1) / 2;
        }
        (self.op)(left, right)
    }
}

/// 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> From<i64> for ModInt<M> {
        fn from(x: i64) -> Self { Self::new(x) }
    }
} // 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 = 1_000_000_007;
define_mod!(P, MOD);
type MInt = mod_int::ModInt<P>;

// Tags: segment-tree, arithmetic-expressions
fn main() {
    let out = std::io::stdout();
    let mut out = BufWriter::new(out.lock());
    macro_rules! puts {($($format:tt)*) => (let _ = write!(out,$($format)*););}
    input! {
        n: usize,
        c: [char; n],
        q: usize,
        txy: [(char, usize1, usize1); q],
    }
    let mut c = c;
    c.push('+');
    let mut st = SegTree::new(n / 2 + 1, |x: Option<Result<(MInt, MInt, MInt), MInt>>, y| {
        match (x, y) {
            (None, y) => y,
            (x, None) => x,
            (Some(x), Some(y)) => match (x, y) {
                (Ok((a, b, c)), Ok((d, e, f))) =>
                    Some(Ok((a, b + c * d + e, f))),
                (Ok((a, b, c)), Err(y)) =>
                    Some(Ok((a, b, c * y))),
                (Err(x), Ok((d, e, f))) =>
                    Some(Ok((x * d, e, f))),
                (Err(x), Err(y)) => Some(Err(x * y)),
            }
        }
    }, None);
    let to = |x: &[char]| {
        let a = MInt::new((x[0] as u8 - b'0') as i64);
        if x[1] == '+' {
            Some(Ok((a, 0.into(), 1.into())))
        } else {
            Some(Err(a))
        }
    };
    for i in 0..n / 2 + 1 {
        st.update(i, to(&c[i * 2..i * 2 + 2]));
    }
    for (t, x, y) in txy {
        if t == '!' {
            c.swap(x, y);
            st.update(x / 2, to(&c[x / 2 * 2..x / 2 * 2 + 2]));
            st.update(y / 2, to(&c[y / 2 * 2..y / 2 * 2 + 2]));
        } else {
            let ans = st.query(x / 2, y / 2 + 1).unwrap();
            let ans = match ans {
                Ok((a, b, cc)) => a + b + if c[y + 1] == '+' {
                    0.into()
                } else {
                    cc
                },
                Err(x) => x,
            };
            puts!("{}\n", ans);
        }
    }
}