Submission #2173632


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/**
*  _           _                 __                            _   _ _   _                                 _                    _                  _
* | |         | |               / /                           | | (_) | (_)                               | |                  (_)                | |
* | |__   __ _| |_ ___   ___   / /__ ___  _ __ ___  _ __   ___| |_ _| |_ ___   _____ ______ _ __ _   _ ___| |_ ______ ___ _ __  _ _ __  _ __   ___| |_ ___
* | '_ \ / _` | __/ _ \ / _ \ / / __/ _ \| '_ ` _ \| '_ \ / _ \ __| | __| \ \ / / _ \______| '__| | | / __| __|______/ __| '_ \| | '_ \| '_ \ / _ \ __/ __|
* | | | | (_| | || (_) | (_) / / (_| (_) | | | | | | |_) |  __/ |_| | |_| |\ V /  __/      | |  | |_| \__ \ |_       \__ \ | | | | |_) | |_) |  __/ |_\__ \
* |_| |_|\__,_|\__\___/ \___/_/ \___\___/|_| |_| |_| .__/ \___|\__|_|\__|_| \_/ \___|      |_|   \__,_|___/\__|      |___/_| |_|_| .__/| .__/ \___|\__|___/
*                                                  | |                                                                           | |   | |
*                                                  |_|                                                                           |_|   |_|
*
* https://github.com/hatoo/competitive-rust-snippets
*/
#[allow(unused_imports)]
use std::cmp::{max, min, Ordering};
#[allow(unused_imports)]
use std::collections::{BTreeMap, BTreeSet, BinaryHeap, HashMap, HashSet, VecDeque};
#[allow(unused_imports)]
use std::iter::FromIterator;
#[allow(unused_imports)]
use std::io::{stdin, stdout, BufWriter, Write};
mod util {
    use std::io::{stdin, stdout, BufWriter, StdoutLock};
    use std::str::FromStr;
    use std::fmt::Debug;
    #[allow(dead_code)]
    pub fn line() -> String {
        let mut line: String = String::new();
        stdin().read_line(&mut line).unwrap();
        line.trim().to_string()
    }
    #[allow(dead_code)]
    pub fn chars() -> Vec<char> {
        line().chars().collect()
    }
    #[allow(dead_code)]
    pub fn gets<T: FromStr>() -> Vec<T>
    where
        <T as FromStr>::Err: Debug,
    {
        let mut line: String = String::new();
        stdin().read_line(&mut line).unwrap();
        line.split_whitespace()
            .map(|t| t.parse().unwrap())
            .collect()
    }
    #[allow(dead_code)]
    pub fn with_bufwriter<F: FnOnce(BufWriter<StdoutLock>) -> ()>(f: F) {
        let out = stdout();
        let writer = BufWriter::new(out.lock());
        f(writer)
    }
}
#[allow(unused_macros)]
macro_rules ! get { ( $ t : ty ) => { { let mut line : String = String :: new ( ) ; stdin ( ) . read_line ( & mut line ) . unwrap ( ) ; line . trim ( ) . parse ::<$ t > ( ) . unwrap ( ) } } ; ( $ ( $ t : ty ) ,* ) => { { let mut line : String = String :: new ( ) ; stdin ( ) . read_line ( & mut line ) . unwrap ( ) ; let mut iter = line . split_whitespace ( ) ; ( $ ( iter . next ( ) . unwrap ( ) . parse ::<$ t > ( ) . unwrap ( ) , ) * ) } } ; ( $ t : ty ; $ n : expr ) => { ( 0 ..$ n ) . map ( | _ | get ! ( $ t ) ) . collect ::< Vec < _ >> ( ) } ; ( $ ( $ t : ty ) ,*; $ n : expr ) => { ( 0 ..$ n ) . map ( | _ | get ! ( $ ( $ t ) ,* ) ) . collect ::< Vec < _ >> ( ) } ; ( $ t : ty ;; ) => { { let mut line : String = String :: new ( ) ; stdin ( ) . read_line ( & mut line ) . unwrap ( ) ; line . split_whitespace ( ) . map ( | t | t . parse ::<$ t > ( ) . unwrap ( ) ) . collect ::< Vec < _ >> ( ) } } ; ( $ t : ty ;; $ n : expr ) => { ( 0 ..$ n ) . map ( | _ | get ! ( $ t ;; ) ) . collect ::< Vec < _ >> ( ) } ; }
#[allow(unused_macros)]
macro_rules ! debug { ( $ ( $ a : expr ) ,* ) => { println ! ( concat ! ( $ ( stringify ! ( $ a ) , " = {:?}, " ) ,* ) , $ ( $ a ) ,* ) ; } }

#[derive(Eq, PartialEq, Clone, Debug)]
/// Equivalent to std::cmp::Reverse
pub struct Rev<T>(pub T);
impl<T: PartialOrd> PartialOrd for Rev<T> {
    fn partial_cmp(&self, other: &Rev<T>) -> Option<Ordering> {
        other.0.partial_cmp(&self.0)
    }
}
impl<T: Ord> Ord for Rev<T> {
    fn cmp(&self, other: &Rev<T>) -> Ordering {
        other.0.cmp(&self.0)
    }
}

#[allow(dead_code)]
fn main() {
    let n = get!(usize);
    let aa = util::gets::<i64>();

    let ans = (0..n)
        .map(|i| {
            let (_, j) = (0..n)
                .filter(|&j| j != i)
                .map(|j| {
                    let l = min(i, j);
                    let r = max(i, j);

                    (
                        Rev((l..r + 1)
                            .enumerate()
                            .filter_map(|(idx, k)| if idx % 2 == 1 { Some(aa[k]) } else { None })
                            .sum::<i64>()),
                        j,
                    )
                })
                .min()
                .unwrap();
            let l = min(i, j);
            let r = max(i, j);
            (l..r + 1)
                .enumerate()
                .filter_map(|(idx, k)| if idx % 2 == 0 { Some(aa[k]) } else { None })
                .sum::<i64>()
        })
        .max()
        .unwrap();

    println!("{}", ans);
}

Submission Info

Submission Time
Task C - 数列ゲーム
User hatoo
Language Rust (1.15.1)
Score 100
Code Size 5132 Byte
Status AC
Exec Time 2 ms
Memory 4352 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 100 / 100
Status
AC × 3
AC × 23
Set Name Test Cases
Sample sample-01.txt, sample-02.txt, sample-03.txt
All sample-01.txt, sample-02.txt, sample-03.txt, test-01.txt, test-02.txt, test-03.txt, test-04.txt, test-05.txt, test-06.txt, test-07.txt, test-08.txt, test-09.txt, test-10.txt, test-11.txt, test-12.txt, test-13.txt, test-14.txt, test-15.txt, test-16.txt, test-17.txt, test-18.txt, test-19.txt, test-20.txt
Case Name Status Exec Time Memory
sample-01.txt AC 2 ms 4352 KB
sample-02.txt AC 2 ms 4352 KB
sample-03.txt AC 2 ms 4352 KB
test-01.txt AC 2 ms 4352 KB
test-02.txt AC 2 ms 4352 KB
test-03.txt AC 2 ms 4352 KB
test-04.txt AC 2 ms 4352 KB
test-05.txt AC 2 ms 4352 KB
test-06.txt AC 2 ms 4352 KB
test-07.txt AC 2 ms 4352 KB
test-08.txt AC 2 ms 4352 KB
test-09.txt AC 2 ms 4352 KB
test-10.txt AC 2 ms 4352 KB
test-11.txt AC 2 ms 4352 KB
test-12.txt AC 2 ms 4352 KB
test-13.txt AC 2 ms 4352 KB
test-14.txt AC 2 ms 4352 KB
test-15.txt AC 2 ms 4352 KB
test-16.txt AC 2 ms 4352 KB
test-17.txt AC 2 ms 4352 KB
test-18.txt AC 2 ms 4352 KB
test-19.txt AC 2 ms 4352 KB
test-20.txt AC 2 ms 4352 KB