#469434 (Rust) No.1036 Make One With GCD 2

• 問題: No.1036 Make One With GCD 2
• ユーザー: cotton_fn_
• 提出日時: 2020-04-24 21:59:11
• 言語: Rust (1.77.0 + proconio)
• 結果: AC
• 実行時間: 346 ms / 2,000 ms
• コード長: 5,661 bytes
• コンパイル時間: 24,662 ms
• コンパイル使用メモリ: 378,452 KB
• 実行使用メモリ: 23,600 KB
• 最終ジャッジ日時: 2024-09-16 13:15:31
• 合計ジャッジ時間: 32,346 ms
• ジャッジサーバーID （参考情報）: judge5 / judge4

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	56 ms; 15,220 KB
testcase_01	AC	83 ms; 11,008 KB
testcase_02	AC	149 ms; 23,600 KB
testcase_03	AC	8 ms; 5,376 KB
testcase_04	AC	13 ms; 5,376 KB
testcase_05	AC	2 ms; 5,376 KB
testcase_06	AC	2 ms; 5,376 KB
testcase_07	AC	21 ms; 6,016 KB
testcase_08	AC	17 ms; 5,376 KB
testcase_09	AC	207 ms; 10,496 KB
testcase_10	AC	159 ms; 10,112 KB
testcase_11	AC	165 ms; 10,880 KB
testcase_12	AC	151 ms; 10,112 KB
testcase_13	AC	315 ms; 14,464 KB
testcase_14	AC	346 ms; 14,608 KB
testcase_15	AC	277 ms; 13,824 KB
testcase_16	AC	279 ms; 13,964 KB
testcase_17	AC	288 ms; 14,464 KB
testcase_18	AC	1 ms; 5,376 KB
testcase_19	AC	1 ms; 5,376 KB
testcase_20	AC	1 ms; 5,376 KB
testcase_21	AC	1 ms; 5,376 KB
testcase_22	AC	277 ms; 13,696 KB
testcase_23	AC	201 ms; 10,752 KB
testcase_24	AC	285 ms; 14,136 KB
testcase_25	AC	258 ms; 13,040 KB
testcase_26	AC	268 ms; 13,460 KB
testcase_27	AC	1 ms; 5,376 KB
testcase_28	AC	2 ms; 5,376 KB
testcase_29	AC	1 ms; 5,376 KB
testcase_30	AC	1 ms; 5,376 KB
testcase_31	AC	1 ms; 5,376 KB
testcase_32	AC	1 ms; 5,376 KB
testcase_33	AC	1 ms; 5,376 KB
testcase_34	AC	1 ms; 5,376 KB
testcase_35	AC	1 ms; 5,376 KB
testcase_36	AC	1 ms; 5,376 KB
testcase_37	AC	1 ms; 5,376 KB
testcase_38	AC	64 ms; 23,168 KB
testcase_39	AC	63 ms; 15,376 KB
testcase_40	AC	211 ms; 10,752 KB
testcase_41	AC	168 ms; 15,360 KB
testcase_42	AC	168 ms; 15,268 KB
testcase_43	AC	146 ms; 17,280 KB
testcase_44	AC	167 ms; 16,256 KB

ソースコード

#![allow(unused)]

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(solve)?
        .join()
        .unwrap();
    Ok(())
}

fn solve() {
    let stdin = io::stdin();
    let mut kin = KInput::new(stdin.lock());
    let stdout = io::stdout();
    let mut out = io::BufWriter::new(stdout.lock());
    macro_rules! output { ($($args:expr),+) => { write!(&mut out, $($args),+) }; }
    macro_rules! outputln {
        ($($args:expr),+) => { output!($($args),+); outputln!(); };
        () => { output!("\n"); if cfg!(debug_assertions) { out.flush(); } }
    }

    let n: usize = kin.input();
    let mut a: Vec<u64> = kin.seq(n);
    a.push(1);
    let mut swag = Swag::new(|&x, &y| gcd(x, y));
    let mut ans = n * (n + 1) / 2;
    let mut j = 0;
    for i in 0..n {
        while j <= n && swag.fold() != Some(1) {
            swag.push(a[j]);
            j += 1;
        }
        let l = j - i - 1;
        ans -= l;
        swag.pop();
    }
    outputln!("{}", ans);
}

fn gcd(mut x: u64, mut y: u64) -> u64 {
    while y != 0 {
        x %= y;
        swap(&mut x, &mut y);
    }
    x
}

pub struct Swag<T, F> {
    f: F,
    f_head: Vec<T>,
    tail: Vec<T>,
    f_tail: Option<T>,
}
impl<T: Clone, F: Fn(&T, &T) -> T> Swag<T, F> {
    pub fn new(f: F) -> Self {
        Self {
            f,
            f_head: Vec::new(),
            tail: Vec::new(),
            f_tail: None,
        }
    }
    pub fn push(&mut self, x: T) {
        self.f_tail = Some(if let Some(y) = self.f_tail.as_ref() {
            (self.f)(y, &x)
        } else {
            x.clone()
        });
        self.tail.push(x);
    }
    pub fn pop(&mut self) {
        if self.f_head.is_empty() {
            for x in self.tail.drain(..).rev() {
                self.f_head.push(if let Some(y) = self.f_head.last() {
                    (self.f)(&x, y)
                } else {
                    x
                });
            }
            self.f_tail = None;
        }
        self.f_head.pop();
    }
    pub fn fold(&self) -> Option<T> {
        match (self.f_head.last(), self.f_tail.as_ref()) {
            (Some(x), Some(y)) => Some((self.f)(x, y)),
            (Some(x), None) => Some(x.clone()),
            (None, Some(y)) => Some(y.clone()),
            _ => None,
        }
    }
    pub fn len(&self) -> usize {
        self.f_head.len() + self.tail.len()
    }
    pub fn is_empty(&self) -> bool {
        self.f_head.is_empty() && self.tail.is_empty()
    }
}

// -----------------------------------------------------------------------------
pub mod kyoproio {
    #![warn(unused)]
    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(1024),
                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);
}