結果

問題 No.576 E869120 and Rings
ユーザー snteasntea
提出日時 2018-05-21 20:53:46
言語 Rust
(1.77.0 + proconio)
結果
AC  
実行時間 689 ms / 1,500 ms
コード長 4,941 bytes
コンパイル時間 13,844 ms
コンパイル使用メモリ 379,832 KB
実行使用メモリ 27,564 KB
最終ジャッジ日時 2024-06-28 15:35:04
合計ジャッジ時間 26,334 ms
ジャッジサーバーID
（参考情報） 		judge4 / judge3
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 635 ms
25,516 KB
testcase_01 AC 644 ms
25,128 KB
testcase_02 AC 689 ms
25,256 KB
testcase_03 AC 656 ms
25,384 KB
testcase_04 AC 652 ms
25,640 KB
testcase_05 AC 635 ms
25,636 KB
testcase_06 AC 645 ms
25,256 KB
testcase_07 AC 639 ms
25,124 KB
testcase_08 AC 452 ms
23,596 KB
testcase_09 AC 448 ms
25,304 KB
testcase_10 AC 470 ms
23,468 KB
testcase_11 AC 476 ms
25,512 KB
testcase_12 AC 460 ms
25,636 KB
testcase_13 AC 478 ms
25,396 KB
testcase_14 AC 496 ms
27,436 KB
testcase_15 AC 357 ms
17,576 KB
testcase_16 AC 438 ms
23,516 KB
testcase_17 AC 519 ms
27,564 KB
testcase_18 AC 445 ms
23,472 KB
testcase_19 AC 482 ms
23,592 KB
testcase_20 AC 447 ms
25,388 KB
testcase_21 AC 459 ms
25,512 KB
testcase_22 AC 1 ms
5,376 KB
testcase_23 AC 1 ms
5,376 KB
testcase_24 AC 1 ms
5,376 KB
testcase_25 AC 1 ms
5,376 KB
testcase_26 AC 1 ms
5,376 KB
testcase_27 AC 1 ms
5,376 KB
testcase_28 AC 1 ms
5,376 KB
testcase_29 AC 1 ms
5,376 KB
権限があれば一括ダウンロードができます
コンパイルメッセージ
warning: unused macro definition: `printf`
   --> src/main.rs:143:18
    |
143 |     macro_rules! printf { ($($arg:tt)*) => (write!(out, $($arg)*).unwrap()); }
    |                  ^^^^^^
    |
    = note: `#[warn(unused_macros)]` on by default

warning: method `unwrap` is never used
   --> src/main.rs:118:8
    |
117 | impl<T: std::cmp::PartialOrd> Ordered<T> {
    | ---------------------------------------- method in this implementation
118 |     fn unwrap(self) -> T {
    |        ^^^^^^
    |
    = note: `#[warn(dead_code)]` on by default

ソースコード

diff # 

#[allow(dead_code)]
fn getline() -> String {
    let mut res = String::new();
    std::io::stdin().read_line(&mut res).ok();
    res
}

#[allow(unused_macros)]
macro_rules! readl {
    ($t: ty) => {
        {
            let s = getline();
            s.trim().parse::<$t>().unwrap()
        }
    };
    ($( $t: ty),+ ) => {
        {
            let s = getline();
            let mut iter = s.trim().split(' ');
            ($(iter.next().unwrap().parse::<$t>().unwrap(),)*)
        }
    };
}

#[allow(unused_macros)]
macro_rules! readlvec {
    ($t:ty) => {{
        let s = getline();
        let iter = s.trim().split(' ');
        iter.map(|x| x.parse().unwrap()).collect::<Vec<$t>>()
    }};
}

#[allow(unused_macros)]
// macro_rules! debug {
//     ($x:expr) => {
//         println!("{}: {:?}", stringify!($x), $x)
//     };
// }
macro_rules! debug { ($x: expr) => () }

#[allow(dead_code)]
fn show<T>(iter: T) -> String
where
    T: Iterator,
    T::Item: std::fmt::Display,
{
    let mut res = iter.fold(String::new(), |sum, e| sum + &format!("{} ", e));
    res.pop();
    res
}

fn sliding_minimum<T>(a: &Vec<T>, width: usize) -> Vec<T>
where
    T: std::cmp::PartialOrd + Clone
{
    let mut res = Vec::with_capacity(a.len() - width);
    let mut set = std::collections::VecDeque::new();

    for (i, e) in a.iter().enumerate().take(width) {
        while let Some((v, i)) = set.pop_back() {
            if v < e {
                set.push_back((v, i));
                break;
            }
        }
        set.push_back((e, i));
    }
    for (s, e) in a.iter().skip(width).enumerate() {
        res.push(set.front().expect("sliding_minimum error").0.clone());
        while let Some((v, i)) = set.pop_back() {
            if v < e {
                set.push_back((v, i));
                break;
            }
        }
        set.push_back((e, s + width));
        while let Some((v, i)) = set.pop_front() {
            if s + 1 <= i {
                set.push_front((v, i));
                break;
            }
        }
    }
    res.push(set.front().expect("sliding_minimum error").0.clone());

    res
}

#[allow(unused_imports)]
use std::cmp::{max, min};
#[allow(unused_imports)]
use std::collections::btree_map::Entry::{Occupied, Vacant};
#[allow(unused_imports)]
use std::collections::{BTreeMap, BTreeSet, BinaryHeap, HashMap, HashSet, VecDeque};

#[derive(PartialEq, PartialOrd, Debug, Clone)]
struct Ordered<T: std::cmp::PartialOrd>(T);

impl<T> Eq for Ordered<T>
where
    T: PartialOrd + Clone,
{
}

impl<T> Ord for Ordered<T>
where
    T: PartialOrd + Clone,
{
    fn cmp(&self, other: &Self) -> std::cmp::Ordering {
        self.partial_cmp(other).unwrap()
    }
}

impl<T: Copy + PartialOrd> Copy for Ordered<T> {}

impl<T: std::cmp::PartialOrd> Ordered<T> {
    fn unwrap(self) -> T {
        let Ordered(res) = self;
        res
    }
}

#[derive(Eq, PartialEq, Clone, Debug)]
struct Reverse<T>(T);

impl<T: PartialOrd> PartialOrd for Reverse<T> {
    fn partial_cmp(&self, other: &Reverse<T>) -> Option<std::cmp::Ordering> {
        other.0.partial_cmp(&self.0)
    }
}

impl<T: Ord> Ord for Reverse<T> {
    fn cmp(&self, other: &Reverse<T>) -> std::cmp::Ordering {
        other.0.cmp(&self.0)
    }
}

fn main() {
    use std::io::Write;
    let out = std::io::stdout();
    let mut out = std::io::BufWriter::new(out.lock());
    macro_rules! printf { ($($arg:tt)*) => (write!(out, $($arg)*).unwrap()); }
    macro_rules! printfln { () => (writeln!(out).unwrap()); ($($arg:tt)*) => (writeln!(out, $($arg)*).unwrap()); }

    let (n, k) = readl!(usize, usize);
    let a: Vec<i32> = readl!(String)
        .into_bytes()
        .into_iter()
        .map(|x| if x == b'0' { 0 } else { 1 })
        .collect();
    if n == 1 {
        printfln!("{}", a[0]);
        return;
    }
    let check = |x: f64| {
        let mut a: Vec<_> = vec![0.].into_iter()
            .chain(
                a.iter().cloned()
                .chain(a.iter().cloned())
                .map(|e| e as f64 - x)
            ).collect();
        debug!(a);
        for i in 0..a.len() - 1 {
            a[i + 1] += a[i];
        }
        debug!(a);
        let a = a.into_iter().map(|x| Reverse(Ordered(x))).collect();
        let maxi: Vec<_> = sliding_minimum(
            &a,
            n - k,
        ).into_iter().map(|Reverse(Ordered(x))| x).collect();
        let a: Vec<_> = a.into_iter().map(|Reverse(Ordered(x))| x).collect();
        debug!(maxi);
        for (&l, &rmax) in a.iter().take(n+1).zip(maxi.iter().cycle().skip(k)) { 
            if l < rmax {
                return false;
            }
        }
        true
    };
    debug!(check(1.));
    let mut l = 0.;
    let mut r = 1.;
    for _ in 0..20 {
        let m = (l + r) / 2.;
        let res = check(m);
        // debug!(res);
        if res {
            r = m;
        } else {
            l = m;
        }
    }

    printfln!("{}", r);
}
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