#1123199 (Rust) No.3284 Picnic with Friends

提出ソース
結果

問題	No.3284 Picnic with Friends
ユーザー	akakimidori
提出日時	2025-09-27 05:23:24
言語	Rust (1.83.0 + proconio)
結果	AC
実行時間	1,043 ms / 7,000 ms
コード長	7,841 bytes
コンパイル時間	12,616 ms
コンパイル使用メモリ	399,636 KB
実行使用メモリ	19,348 KB
最終ジャッジ日時	2025-09-27 05:24:10
合計ジャッジ時間	29,532 ms
ジャッジサーバーID （参考情報）	judge1 / judge5
このコードへのチャレンジ
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ファイルパターン	結果
sample	AC * 3
other	AC * 25
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ソースコード

raw source code
use std::io::Write;

fn run() {
    input! {
        n: usize,
        s: [usize; n],
        q: usize,
        p: [(usize, usize); q],
    }
    let mut a = vec![];
    let mut l = 0;
    while l < p.len() {
        let (s, mut t) = p[l];
        t += s;
        l += 1;
        while let Some(&p) = p.get(l) {
            if p.0 <= t {
                t += p.1;
                l += 1;
            } else {
                break;
            }
        }
        a.push(t - s);
    }
    let sa = a.iter().sum::<usize>();
    let m = (1..).find(|k| *k * *k > sa).unwrap();
    let mut imos = vec![0; m + 2];
    let mut memo = vec![];
    for a in a {
        let mut l = 1;
        while l <= m && l <= a {
            let q = a / l;
            let r = m.min(a / q);
            imos[l] += q;
            imos[r + 1] -= q;
            l = r + 1;
        }
        while l <= a {
            let q = a / l;
            let r = a / q;
            memo.push((l, q));
            memo.push((r + 1, !q + 1));
            l = r + 1;
        }
    }
    memo.sort();
    memo.dedup_by(|a, b| a.0 == b.0 && {
        b.1 += a.1;
        true
    });
    for i in 1..imos.len() {
        imos[i] += imos[i - 1];
    }
    for i in 1..memo.len() {
        memo[i].1 += memo[i - 1].1;
    }
    let out = std::io::stdout();
    let mut out = std::io::BufWriter::new(out.lock());
    for s in s {
        let ans = if s <= m {
            imos[s]
        } else {
            let x = memo.upper_bound_by_key(&s, |p| p.0);
            memo[x - 1].1
        };
        writeln!(out, "{}", ans).ok();
    }
}

fn main() {
    run();
}

// ---------- begin input macro ----------
// reference: https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8
#[macro_export]
macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
    ($($r:tt)*) => {
        let s = {
            use std::io::Read;
            let mut s = String::new();
            std::io::stdin().read_to_string(&mut s).unwrap();
            s
        };
        let mut iter = s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
}

#[macro_export]
macro_rules! input_inner {
    ($iter:expr) => {};
    ($iter:expr, ) => {};
    ($iter:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($iter, $t);
        input_inner!{$iter $($r)*}
    };
}

#[macro_export]
macro_rules! read_value {
    ($iter:expr, ( $($t:tt),* )) => {
        ( $(read_value!($iter, $t)),* )
    };
    ($iter:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>()
    };
    ($iter:expr, chars) => {
        read_value!($iter, String).chars().collect::<Vec<char>>()
    };
    ($iter:expr, bytes) => {
        read_value!($iter, String).bytes().collect::<Vec<u8>>()
    };
    ($iter:expr, usize1) => {
        read_value!($iter, usize) - 1
    };
    ($iter:expr, $t:ty) => {
        $iter.next().unwrap().parse::<$t>().expect("Parse error")
    };
}
// ---------- end input macro ----------
// ---------- begin radix heap ----------
pub trait RadixKeyType: Copy + Ord + std::ops::BitXor<Output = Self> {
    fn leading_zeros(self) -> usize;
    fn zero() -> Self;
    const SIZE: usize = std::mem::size_of::<Self>() * 8;
    fn bsr(self) -> usize {
        Self::SIZE - self.leading_zeros() as usize
    }
}

pub struct RadixHeap<K, V> {
    buf: Vec<Vec<(K, V)>>,
    last: K,
}

impl<K, V> RadixHeap<K, V>
where
    K: RadixKeyType,
{
    pub fn new() -> Self {
        RadixHeap {
            buf: (0..K::SIZE).map(|_| vec![]).collect(),
            last: K::zero(),
        }
    }
    pub fn init(&mut self) {
        self.buf.iter_mut().for_each(|p| p.clear());
        self.last = K::zero();
    }
    pub fn push(&mut self, key: K, val: V) {
        assert!(self.last <= key);
        self.buf[(self.last ^ key).bsr()].push((key, val));
    }
    pub fn pop(&mut self) -> Option<(K, V)> {
        if self.buf[0].is_empty() {
            if let Some(x) = self.buf.iter().position(|a| !a.is_empty()) {
                let mut a = std::mem::take(&mut self.buf[x]);
                self.last = a.iter().map(|p| p.0).min().unwrap();
                for (key, val) in a.drain(..) {
                    self.buf[(self.last ^ key).bsr()].push((key, val));
                }
                self.buf[x] = a;
            }
        }
        self.buf[0].pop()
    }
}

macro_rules! impl_radix_key_type {
    ($x: ty) => {
        impl RadixKeyType for $x {
            fn leading_zeros(self) -> usize {
                self.leading_zeros() as usize
            }
            fn zero() -> Self {
                0
            }
        }
    };
}

impl_radix_key_type!(u64);
impl_radix_key_type!(u32);
impl_radix_key_type!(usize);
// ---------- end radix heap ----------

// ---------- begin super slice ----------
pub trait SuperSlice {
    type Item;
    fn lower_bound(&self, key: &Self::Item) -> usize
    where
        Self::Item: Ord;
    fn lower_bound_by<F>(&self, f: F) -> usize
    where
        F: FnMut(&Self::Item) -> std::cmp::Ordering;
    fn lower_bound_by_key<K, F>(&self, key: &K, f: F) -> usize
    where
        K: Ord,
        F: FnMut(&Self::Item) -> K;
    fn upper_bound(&self, key: &Self::Item) -> usize
    where
        Self::Item: Ord;
    fn upper_bound_by<F>(&self, f: F) -> usize
    where
        F: FnMut(&Self::Item) -> std::cmp::Ordering;
    fn upper_bound_by_key<K, F>(&self, key: &K, f: F) -> usize
    where
        K: Ord,
        F: FnMut(&Self::Item) -> K;
    fn next_permutation(&mut self) -> bool
    where
        Self::Item: Ord;
    fn next_permutation_by<F>(&mut self, f: F) -> bool
    where
        F: FnMut(&Self::Item, &Self::Item) -> std::cmp::Ordering;
    fn prev_permutation(&mut self) -> bool
    where
        Self::Item: Ord;
}

impl<T> SuperSlice for [T] {
    type Item = T;
    fn lower_bound(&self, key: &Self::Item) -> usize
    where
        T: Ord,
    {
        self.lower_bound_by(|p| p.cmp(key))
    }
    fn lower_bound_by<F>(&self, mut f: F) -> usize
    where
        F: FnMut(&Self::Item) -> std::cmp::Ordering,
    {
        self.binary_search_by(|p| f(p).then(std::cmp::Ordering::Greater))
            .unwrap_err()
    }
    fn lower_bound_by_key<K, F>(&self, key: &K, mut f: F) -> usize
    where
        K: Ord,
        F: FnMut(&Self::Item) -> K,
    {
        self.lower_bound_by(|p| f(p).cmp(key))
    }
    fn upper_bound(&self, key: &Self::Item) -> usize
    where
        T: Ord,
    {
        self.upper_bound_by(|p| p.cmp(key))
    }
    fn upper_bound_by<F>(&self, mut f: F) -> usize
    where
        F: FnMut(&Self::Item) -> std::cmp::Ordering,
    {
        self.binary_search_by(|p| f(p).then(std::cmp::Ordering::Less))
            .unwrap_err()
    }
    fn upper_bound_by_key<K, F>(&self, key: &K, mut f: F) -> usize
    where
        K: Ord,
        F: FnMut(&Self::Item) -> K,
    {
        self.upper_bound_by(|p| f(p).cmp(key))
    }
    fn next_permutation(&mut self) -> bool
    where
        T: Ord,
    {
        self.next_permutation_by(|a, b| a.cmp(b))
    }
    fn next_permutation_by<F>(&mut self, mut f: F) -> bool
    where
        F: FnMut(&Self::Item, &Self::Item) -> std::cmp::Ordering,
    {
        use std::cmp::Ordering::*;
        if let Some(x) = self.windows(2).rposition(|a| f(&a[0], &a[1]) == Less) {
            let y = self.iter().rposition(|b| f(&self[x], b) == Less).unwrap();
            self.swap(x, y);
            self[(x + 1)..].reverse();
            true
        } else {
            self.reverse();
            false
        }
    }
    fn prev_permutation(&mut self) -> bool
    where
        T: Ord,
    {
        self.next_permutation_by(|a, b| a.cmp(b).reverse())
    }
}
// ---------- end super slice ----------
yukicoder

結果

ソースコード
