#566773 (Rust) No.1211 円環はお断り

• 問題: No.1211 円環はお断り
• ユーザー: cotton_fn_
• 提出日時: 2020-10-15 10:21:47
• 言語: Rust (1.77.0)
• 結果: AC
• 実行時間: 332 ms / 2,000 ms
• コード長: 5,302 bytes
• コンパイル時間: 2,295 ms
• コンパイル使用メモリ: 152,132 KB
• 実行使用メモリ: 6,768 KB
• 最終ジャッジ日時: 2023-09-28 01:08:05
• 合計ジャッジ時間: 11,121 ms
• ジャッジサーバーID （参考情報）: judge14 / judge15

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	1 ms; 4,384 KB
testcase_01	AC	1 ms; 4,504 KB
testcase_02	AC	1 ms; 4,380 KB
testcase_03	AC	1 ms; 4,380 KB
testcase_04	AC	1 ms; 4,384 KB
testcase_05	AC	1 ms; 4,376 KB
testcase_06	AC	1 ms; 4,380 KB
testcase_07	AC	1 ms; 4,380 KB
testcase_08	AC	1 ms; 4,380 KB
testcase_09	AC	1 ms; 4,376 KB
testcase_10	AC	1 ms; 4,380 KB
testcase_11	AC	1 ms; 4,380 KB
testcase_12	AC	1 ms; 4,376 KB
testcase_13	AC	146 ms; 4,380 KB
testcase_14	AC	225 ms; 4,504 KB
testcase_15	AC	244 ms; 4,492 KB
testcase_16	AC	332 ms; 6,360 KB
testcase_17	AC	29 ms; 4,380 KB
testcase_18	AC	217 ms; 4,980 KB
testcase_19	AC	21 ms; 4,376 KB
testcase_20	AC	35 ms; 4,380 KB
testcase_21	AC	28 ms; 4,376 KB
testcase_22	AC	152 ms; 4,380 KB
testcase_23	AC	166 ms; 4,532 KB
testcase_24	AC	106 ms; 4,380 KB
testcase_25	AC	7 ms; 4,380 KB
testcase_26	AC	275 ms; 4,928 KB
testcase_27	AC	88 ms; 4,376 KB
testcase_28	AC	270 ms; 4,888 KB
testcase_29	AC	182 ms; 4,504 KB
testcase_30	AC	225 ms; 5,372 KB
testcase_31	AC	102 ms; 4,384 KB
testcase_32	AC	233 ms; 5,972 KB
testcase_33	AC	277 ms; 6,728 KB
testcase_34	AC	275 ms; 6,644 KB
testcase_35	AC	261 ms; 6,736 KB
testcase_36	AC	322 ms; 6,648 KB
testcase_37	AC	327 ms; 6,664 KB
testcase_38	AC	248 ms; 6,752 KB
testcase_39	AC	248 ms; 6,768 KB
testcase_40	AC	188 ms; 6,040 KB
testcase_41	AC	1 ms; 4,380 KB
testcase_42	AC	2 ms; 4,376 KB

ソースコード

#![allow(unused_imports, unused_macros)]

use kyoproio::*;
use std::{
    collections::*,
    io::{self, prelude::*},
    iter,
    mem::{replace, swap},
};

fn main() -> io::Result<()> {
    std::thread::Builder::new()
        .stack_size(64 * 1024 * 1024)
        .spawn(|| {
            run(
                KInput::new(io::stdin().lock()),
                io::BufWriter::new(io::stdout().lock()),
            )
        })?
        .join()
        .unwrap();
    Ok(())
}

fn run<I: Input, O: Write>(mut kin: I, mut out: O) {
    macro_rules! output { ($($args:expr),+) => { write!(&mut out, $($args),+).unwrap(); }; }
    macro_rules! outputln {
        ($($args:expr),+) => { output!($($args),+); outputln!(); };
        () => { output!("\n"); if cfg!(debug_assertions) { out.flush().unwrap(); } }
    }

    let (n, k): (usize, usize) = kin.input();
    let a: Vec<i64> = kin.seq(n);

    let mut l = 0;
    let mut r = 1e15 as i64;
    while r - l >= 2 {
        let h = (l + r) / 2;
        let mut j = 0;
        let mut s = 0;
        let mut next = vec![0; 2 * n];
        let mut ok1 = true;
        for i in 0..2 * n {
            while s < h && j - i <= n {
                s += a[j % n];
                j += 1;
            }
            if j - i > n {
                ok1 = false;
            }
            next[i] = j;
            s -= a[i % n];
        }

        let mut size = vec![1; 2 * n];
        let mut stk = Vec::new();
        let mut ok = false;
        for i in 0..n {
            let mut j = i;
            while next[j] - i <= n {
                stk.push(j);
                j = next[j];
            }
            let mut scr = 0;
            if let Some(last) = stk.pop() {
                while let Some(j) = stk.pop() {
                    size[j] += size[next[j]];
                    next[j] = next[last];
                }
                scr += size[i];
                if scr >= k {
                    ok = true;
                    break;
                }
            }
        }
        if ok1 && ok {
            l = h;
        } else {
            r = h;
        }
    }
    outputln!("{}", l);
}

// -----------------------------------------------------------------------------
pub mod kyoproio {
    use std::io::prelude::*;
    pub trait Input {
        fn str(&mut self) -> &str;
        fn input<T: InputParse>(&mut self) -> T {
            T::input(self)
        }
        fn iter<T: InputParse>(&mut self) -> Iter<T, Self> {
            Iter(self, std::marker::PhantomData)
        }
        fn seq<T: InputParse, B: std::iter::FromIterator<T>>(&mut self, n: usize) -> B {
            self.iter().take(n).collect()
        }
    }
    pub struct KInput<R> {
        src: R,
        buf: String,
        pos: usize,
    }
    impl<R: BufRead> KInput<R> {
        pub fn new(src: R) -> Self {
            Self {
                src,
                buf: String::with_capacity(1 << 12),
                pos: 0,
            }
        }
    }
    impl<R: BufRead> Input for KInput<R> {
        fn str(&mut self) -> &str {
            loop {
                if self.pos >= self.buf.len() {
                    self.pos = 0;
                    self.buf.clear();
                    if self.src.read_line(&mut self.buf).expect("io error") == 0 {
                        return &self.buf;
                    }
                }
                let range = self.pos
                    ..self.buf[self.pos..]
                        .find(|c: char| c.is_ascii_whitespace())
                        .map(|i| i + self.pos)
                        .unwrap_or_else(|| self.buf.len());
                self.pos = range.end + 1;
                if range.end > range.start {
                    return &self.buf[range];
                }
            }
        }
    }
    pub struct Iter<'a, T, I: ?Sized>(&'a mut I, std::marker::PhantomData<*const T>);
    impl<'a, T: InputParse, I: Input + ?Sized> Iterator for Iter<'a, T, I> {
        type Item = T;
        fn next(&mut self) -> Option<T> {
            Some(self.0.input())
        }
    }
    pub trait InputParse: Sized {
        fn input<I: Input + ?Sized>(src: &mut I) -> Self;
    }
    impl InputParse for Vec<u8> {
        fn input<I: Input + ?Sized>(src: &mut I) -> Self {
            src.str().as_bytes().to_owned()
        }
    }
    macro_rules! from_str_impl {
        { $($T:ty)* } => {
            $(impl InputParse for $T {
                fn input<I: Input + ?Sized>(src: &mut I) -> Self {
                    src.str().parse::<$T>().expect("parse error")
                }
            })*
        }
    }
    from_str_impl! {
        String char bool f32 f64 isize i8 i16 i32 i64 i128 usize u8 u16 u32 u64 u128
    }
    macro_rules! tuple_impl {
        ($H:ident $($T:ident)*) => {
            impl<$H: InputParse, $($T: InputParse),*> InputParse for ($H, $($T),*) {
                fn input<I: Input + ?Sized>(src: &mut I) -> Self {
                    ($H::input(src), $($T::input(src)),*)
                }
            }
            tuple_impl!($($T)*);
        };
        () => {}
    }
    tuple_impl!(A B C D E F G);
    #[macro_export]
    macro_rules! kdbg {
        ($($v:expr),*) => {
            if cfg!(debug_assertions) { dbg!($($v),*) } else { ($($v),*) }
        }
    }
}