#900056 (Rust) No.1391 ±1 Abs Sum

• 問題: No.1391 ±1 Abs Sum
• ユーザー: koba-e964
• 提出日時: 2023-08-11 09:15:26
• 言語: Rust (1.77.0)
• 結果: AC
• 実行時間: 489 ms / 2,000 ms
• コード長: 3,661 bytes
• コンパイル時間: 14,455 ms
• コンパイル使用メモリ: 379,876 KB
• 実行使用メモリ: 5,376 KB
• 最終ジャッジ日時: 2024-04-29 01:46:53
• 合計ジャッジ時間: 24,059 ms
• ジャッジサーバーID （参考情報）: judge1 / judge5

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	1 ms; 5,248 KB
testcase_01	AC	1 ms; 5,248 KB
testcase_02	AC	1 ms; 5,376 KB
testcase_03	AC	1 ms; 5,376 KB
testcase_04	AC	1 ms; 5,376 KB
testcase_05	AC	1 ms; 5,376 KB
testcase_06	AC	1 ms; 5,376 KB
testcase_07	AC	1 ms; 5,376 KB
testcase_08	AC	1 ms; 5,376 KB
testcase_09	AC	1 ms; 5,376 KB
testcase_10	AC	1 ms; 5,376 KB
testcase_11	AC	465 ms; 5,376 KB
testcase_12	AC	337 ms; 5,376 KB
testcase_13	AC	422 ms; 5,376 KB
testcase_14	AC	276 ms; 5,376 KB
testcase_15	AC	322 ms; 5,376 KB
testcase_16	AC	383 ms; 5,376 KB
testcase_17	AC	326 ms; 5,376 KB
testcase_18	AC	457 ms; 5,376 KB
testcase_19	AC	285 ms; 5,376 KB
testcase_20	AC	467 ms; 5,376 KB
testcase_21	AC	294 ms; 5,376 KB
testcase_22	AC	301 ms; 5,376 KB
testcase_23	AC	342 ms; 5,376 KB
testcase_24	AC	323 ms; 5,376 KB
testcase_25	AC	331 ms; 5,376 KB
testcase_26	AC	334 ms; 5,376 KB
testcase_27	AC	225 ms; 5,376 KB
testcase_28	AC	229 ms; 5,376 KB
testcase_29	AC	314 ms; 5,376 KB
testcase_30	AC	260 ms; 5,376 KB
testcase_31	AC	489 ms; 5,376 KB
testcase_32	AC	227 ms; 5,376 KB
testcase_33	AC	264 ms; 5,376 KB
testcase_34	AC	338 ms; 5,376 KB
testcase_35	AC	1 ms; 5,376 KB
testcase_36	AC	320 ms; 5,376 KB

ソースコード

#[allow(unused_imports)]
use std::cmp::*;
#[allow(unused_imports)]
use std::collections::*;
// https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8
macro_rules! input {
    ($($r:tt)*) => {
        let stdin = std::io::stdin();
        let mut bytes = std::io::Read::bytes(std::io::BufReader::new(stdin.lock()));
        let mut next = move || -> String{
            bytes.by_ref().map(|r|r.unwrap() as char)
                .skip_while(|c|c.is_whitespace())
                .take_while(|c|!c.is_whitespace())
                .collect()
        };
        input_inner!{next, $($r)*}
    };
}

macro_rules! input_inner {
    ($next:expr) => {};
    ($next:expr,) => {};
    ($next:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($next, $t);
        input_inner!{$next $($r)*}
    };
}

macro_rules! read_value {
    ($next:expr, ( $($t:tt),* )) => { ($(read_value!($next, $t)),*) };
    ($next:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($next, $t)).collect::<Vec<_>>()
    };
    ($next:expr, chars) => {
        read_value!($next, String).chars().collect::<Vec<char>>()
    };
    ($next:expr, usize1) => (read_value!($next, usize) - 1);
    ($next:expr, [ $t:tt ]) => {{
        let len = read_value!($next, usize);
        read_value!($next, [$t; len])
    }};
    ($next:expr, $t:ty) => ($next().parse::<$t>().expect("Parse error"));
}

trait Change { fn chmax(&mut self, x: Self); fn chmin(&mut self, x: Self); }
impl<T: PartialOrd> Change for T {
    fn chmax(&mut self, x: T) { if *self < x { *self = x; } }
    fn chmin(&mut self, x: T) { if *self > x { *self = x; } }
}

trait Bisect<T> {
    fn lower_bound(&self, val: &T) -> usize;
    fn upper_bound(&self, val: &T) -> usize;
}

impl<T: Ord> Bisect<T> for [T] {
    fn lower_bound(&self, val: &T) -> usize {
        let mut pass = self.len() + 1;
        let mut fail = 0;
        while pass - fail > 1 {
            let mid = (pass + fail) / 2;
            if &self[mid - 1] >= val {
                pass = mid;
            } else {
                fail = mid;
            }
        }
        pass - 1
    }
    fn upper_bound(&self, val: &T) -> usize {
        let mut pass = self.len() + 1;
        let mut fail = 0;
        while pass - fail > 1 {
            let mid = (pass + fail) / 2;
            if &self[mid - 1] > val {
                pass = mid;
            } else {
                fail = mid;
            }
        }
        pass - 1
    }
}

fn main() {
    // In order to avoid potential stack overflow, spawn a new thread.
    let stack_size = 104_857_600; // 100 MB
    let thd = std::thread::Builder::new().stack_size(stack_size);
    thd.spawn(|| solve()).unwrap().join().unwrap();
}

fn solve() {
    input! {
        n: usize, k: usize,
        a: [i64; n],
    }
    let mut acc = vec![0; n + 1];
    for i in 0..n {
        acc[i + 1] = acc[i] + a[i];
    }
    let f = |i: usize| {
        let mut pass = 1i64 << 31;
        let mut fail = -1;
        let x = a[i];
        while pass - fail > 1 {
            let mid = (pass + fail) / 2;
            let over = i - a[..i].lower_bound(&(x - mid))
                + a[i..].upper_bound(&(x + mid));
            if over >= k {
                pass = mid;
            } else {
                fail = mid;
            }
        }
        let lo = a[..i].lower_bound(&(x - pass));
        let hi = a[i..].upper_bound(&(x + pass)) + i;
        let g = |s: usize, t: usize| acc[t] - acc[s] - (t - s) as i64 * x;
        -g(hi, n) + g(i, hi) - g(lo, i) + g(0, lo)
    };
    let mut ans = 1 << 60;
    for i in 0..n {
        ans = min(ans, f(i));
    }
    println!("{}", ans);
}