#1182702 (Rust) No.3327 うるせぇ、ポリオミノぶつけんぞ

• 問題: No.3327 うるせぇ、ポリオミノぶつけんぞ
• ユーザー: yiwiy9
• 提出日時: 2026-09-04 23:54:36
• 言語: Rust (1.97.1 + proconio + num + itertools)
• 結果: AC
• 実行時間: 190 ms / 3,000 ms
• コード長: 10,000 bytes
• コンパイル時間: 630 ms
• コンパイル使用メモリ: 208,520 KB
• 実行使用メモリ: 10,972 KB
• 最終ジャッジ日時: 2026-09-04 23:54:52
• 合計ジャッジ時間: 8,410 ms
• ジャッジサーバーID （参考情報）: judge1_0 / judge2_0

ファイルパターン	結果
sample	AC * 1
other	AC * 24

ソースコード

use proconio::input;

fn main() {
    input! {
        n: usize,
        q: usize,
        a: [usize; n],
        cx: [(u8, usize); q],
    }

    let mut max_segtree = Segtree::<Max<usize>>::new(n + 2);
    for (i, &a_i) in a.iter().enumerate() {
        max_segtree.set(i + 1, a_i);
    }

    for &(c, x) in &cx {
        match c {
            1 => {
                let j = max_segtree.max_right(0, |&a_i_max| a_i_max <= x);
                if j > n {
                    println!("-1");
                } else {
                    println!("{}", j);
                    max_segtree.set(j, 0);
                }
            }
            2 => {
                let j = max_segtree.min_left(n + 1, |&a_i_max| a_i_max <= x);
                if j <= 1 {
                    println!("-1");
                } else {
                    println!("{}", j - 1);
                    max_segtree.set(j - 1, 0);
                }
            }
            _ => unreachable!(),
        }
    }
}

pub(crate) fn ceil_pow2(n: u32) -> u32 {
    32 - n.saturating_sub(1).leading_zeros()
}
use std::{
    fmt,
    iter::{Product, Sum},
    ops::{
        Add, AddAssign, BitAnd, BitAndAssign, BitOr, BitOrAssign, BitXor, BitXorAssign, Div,
        DivAssign, Mul, MulAssign, Not, Rem, RemAssign, Shl, ShlAssign, Shr, ShrAssign, Sub,
        SubAssign,
    },
};

// Skipped:
//
// - `is_signed_int_t<T>`   (probably won't be used directly in `modint.rs`)
// - `is_unsigned_int_t<T>` (probably won't be used directly in `modint.rs`)
// - `to_unsigned_t<T>`     (not used in `fenwicktree.rs`)

/// Corresponds to `std::is_integral` in C++.
// We will remove unnecessary bounds later.
//
// Maybe we should rename this to `PrimitiveInteger` or something, as it probably won't be used in the
// same way as the original ACL.
pub trait Integral:
    'static
    + Send
    + Sync
    + Copy
    + Ord
    + Not<Output = Self>
    + Add<Output = Self>
    + Sub<Output = Self>
    + Mul<Output = Self>
    + Div<Output = Self>
    + Rem<Output = Self>
    + AddAssign
    + SubAssign
    + MulAssign
    + DivAssign
    + RemAssign
    + Sum
    + Product
    + BitOr<Output = Self>
    + BitAnd<Output = Self>
    + BitXor<Output = Self>
    + BitOrAssign
    + BitAndAssign
    + BitXorAssign
    + Shl<Output = Self>
    + Shr<Output = Self>
    + ShlAssign
    + ShrAssign
    + fmt::Display
    + fmt::Debug
    + fmt::Binary
    + fmt::Octal
    + Zero
    + One
    + BoundedBelow
    + BoundedAbove
{
}

/// Class that has additive identity element
pub trait Zero {
    /// The additive identity element
    fn zero() -> Self;
}

/// Class that has multiplicative identity element
pub trait One {
    /// The multiplicative identity element
    fn one() -> Self;
}

pub trait BoundedBelow {
    fn min_value() -> Self;
}

pub trait BoundedAbove {
    fn max_value() -> Self;
}

macro_rules! impl_integral {
    ($($ty:ty),*) => {
        $(
            impl Zero for $ty {
                #[inline]
                fn zero() -> Self {
                    0
                }
            }

            impl One for $ty {
                #[inline]
                fn one() -> Self {
                    1
                }
            }

            impl BoundedBelow for $ty {
                #[inline]
                fn min_value() -> Self {
                    Self::min_value()
                }
            }

            impl BoundedAbove for $ty {
                #[inline]
                fn max_value() -> Self {
                    Self::max_value()
                }
            }

            impl Integral for $ty {}
        )*
    };
}

impl_integral!(i8, i16, i32, i64, i128, isize, u8, u16, u32, u64, u128, usize);

use std::cmp::{max, min};
use std::convert::Infallible;
use std::marker::PhantomData;
use std::ops::{Bound, RangeBounds};

// TODO Should I split monoid-related traits to another module?
pub trait Monoid {
    type S: Clone;
    fn identity() -> Self::S;
    fn binary_operation(a: &Self::S, b: &Self::S) -> Self::S;
}

pub struct Max<S>(Infallible, PhantomData<fn() -> S>);
impl<S> Monoid for Max<S>
where
    S: Copy + Ord + BoundedBelow,
{
    type S = S;
    fn identity() -> Self::S {
        S::min_value()
    }
    fn binary_operation(a: &Self::S, b: &Self::S) -> Self::S {
        max(*a, *b)
    }
}

pub struct Min<S>(Infallible, PhantomData<fn() -> S>);
impl<S> Monoid for Min<S>
where
    S: Copy + Ord + BoundedAbove,
{
    type S = S;
    fn identity() -> Self::S {
        S::max_value()
    }
    fn binary_operation(a: &Self::S, b: &Self::S) -> Self::S {
        min(*a, *b)
    }
}

pub struct Additive<S>(Infallible, PhantomData<fn() -> S>);
impl<S> Monoid for Additive<S>
where
    S: Copy + Add<Output = S> + Zero,
{
    type S = S;
    fn identity() -> Self::S {
        S::zero()
    }
    fn binary_operation(a: &Self::S, b: &Self::S) -> Self::S {
        *a + *b
    }
}

pub struct Multiplicative<S>(Infallible, PhantomData<fn() -> S>);
impl<S> Monoid for Multiplicative<S>
where
    S: Copy + Mul<Output = S> + One,
{
    type S = S;
    fn identity() -> Self::S {
        S::one()
    }
    fn binary_operation(a: &Self::S, b: &Self::S) -> Self::S {
        *a * *b
    }
}

impl<M: Monoid> Default for Segtree<M> {
    fn default() -> Self {
        Segtree::new(0)
    }
}
impl<M: Monoid> Segtree<M> {
    pub fn new(n: usize) -> Segtree<M> {
        vec![M::identity(); n].into()
    }
}
impl<M: Monoid> From<Vec<M::S>> for Segtree<M> {
    fn from(v: Vec<M::S>) -> Self {
        let n = v.len();
        let log = ceil_pow2(n as u32) as usize;
        let size = 1 << log;
        let mut d = vec![M::identity(); 2 * size];
        d[size..(size + n)].clone_from_slice(&v);
        let mut ret = Segtree { n, size, log, d };
        for i in (1..size).rev() {
            ret.update(i);
        }
        ret
    }
}
impl<M: Monoid> Segtree<M> {
    pub fn set(&mut self, mut p: usize, x: M::S) {
        assert!(p < self.n);
        p += self.size;
        self.d[p] = x;
        for i in 1..=self.log {
            self.update(p >> i);
        }
    }

    pub fn get(&self, p: usize) -> M::S {
        assert!(p < self.n);
        self.d[p + self.size].clone()
    }

    pub fn prod<R>(&self, range: R) -> M::S
    where
        R: RangeBounds<usize>,
    {
        // Trivial optimization
        if range.start_bound() == Bound::Unbounded && range.end_bound() == Bound::Unbounded {
            return self.all_prod();
        }

        let mut r = match range.end_bound() {
            Bound::Included(r) => r + 1,
            Bound::Excluded(r) => *r,
            Bound::Unbounded => self.n,
        };
        let mut l = match range.start_bound() {
            Bound::Included(l) => *l,
            Bound::Excluded(l) => l + 1,
            // TODO: There are another way of optimizing [0..r)
            Bound::Unbounded => 0,
        };

        assert!(l <= r && r <= self.n);
        let mut sml = M::identity();
        let mut smr = M::identity();
        l += self.size;
        r += self.size;

        while l < r {
            if l & 1 != 0 {
                sml = M::binary_operation(&sml, &self.d[l]);
                l += 1;
            }
            if r & 1 != 0 {
                r -= 1;
                smr = M::binary_operation(&self.d[r], &smr);
            }
            l >>= 1;
            r >>= 1;
        }

        M::binary_operation(&sml, &smr)
    }

    pub fn all_prod(&self) -> M::S {
        self.d[1].clone()
    }

    pub fn max_right<F>(&self, mut l: usize, f: F) -> usize
    where
        F: Fn(&M::S) -> bool,
    {
        assert!(l <= self.n);
        assert!(f(&M::identity()));
        if l == self.n {
            return self.n;
        }
        l += self.size;
        let mut sm = M::identity();
        while {
            // do
            while l % 2 == 0 {
                l >>= 1;
            }
            if !f(&M::binary_operation(&sm, &self.d[l])) {
                while l < self.size {
                    l *= 2;
                    let res = M::binary_operation(&sm, &self.d[l]);
                    if f(&res) {
                        sm = res;
                        l += 1;
                    }
                }
                return l - self.size;
            }
            sm = M::binary_operation(&sm, &self.d[l]);
            l += 1;
            // while
            {
                let l = l as isize;
                (l & -l) != l
            }
        } {}
        self.n
    }

    pub fn min_left<F>(&self, mut r: usize, f: F) -> usize
    where
        F: Fn(&M::S) -> bool,
    {
        assert!(r <= self.n);
        assert!(f(&M::identity()));
        if r == 0 {
            return 0;
        }
        r += self.size;
        let mut sm = M::identity();
        while {
            // do
            r -= 1;
            while r > 1 && r % 2 == 1 {
                r >>= 1;
            }
            if !f(&M::binary_operation(&self.d[r], &sm)) {
                while r < self.size {
                    r = 2 * r + 1;
                    let res = M::binary_operation(&self.d[r], &sm);
                    if f(&res) {
                        sm = res;
                        r -= 1;
                    }
                }
                return r + 1 - self.size;
            }
            sm = M::binary_operation(&self.d[r], &sm);
            // while
            {
                let r = r as isize;
                (r & -r) != r
            }
        } {}
        0
    }

    fn update(&mut self, k: usize) {
        self.d[k] = M::binary_operation(&self.d[2 * k], &self.d[2 * k + 1]);
    }
}

// Maybe we can use this someday
// ```
// for i in 0..=self.log {
//     for j in 0..1 << i {
//         print!("{}\t", self.d[(1 << i) + j]);
//     }
//     println!();
// }
// ```

pub struct Segtree<M>
where
    M: Monoid,
{
    // variable name is _n in original library
    n: usize,
    size: usize,
    log: usize,
    d: Vec<M::S>,
}