結果

問題 No.2488 Mod Sum Maximization
ユーザー koba-e964koba-e964
提出日時 2023-12-20 12:26:19
言語 Rust
(1.77.0 + proconio)
結果
AC  
実行時間 347 ms / 2,000 ms
コード長 3,727 bytes
コンパイル時間 14,564 ms
コンパイル使用メモリ 389,760 KB
実行使用メモリ 20,656 KB
最終ジャッジ日時 2024-09-27 09:48:24
合計ジャッジ時間 21,314 ms
ジャッジサーバーID
(参考情報)
judge5 / judge4
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 14 ms
18,296 KB
testcase_01 AC 11 ms
18,236 KB
testcase_02 AC 6 ms
18,240 KB
testcase_03 AC 294 ms
20,488 KB
testcase_04 AC 295 ms
20,484 KB
testcase_05 AC 296 ms
20,656 KB
testcase_06 AC 277 ms
20,572 KB
testcase_07 AC 202 ms
19,788 KB
testcase_08 AC 284 ms
20,396 KB
testcase_09 AC 222 ms
19,840 KB
testcase_10 AC 169 ms
19,532 KB
testcase_11 AC 15 ms
18,336 KB
testcase_12 AC 154 ms
19,504 KB
testcase_13 AC 128 ms
19,164 KB
testcase_14 AC 37 ms
18,428 KB
testcase_15 AC 179 ms
19,600 KB
testcase_16 AC 17 ms
18,412 KB
testcase_17 AC 63 ms
18,540 KB
testcase_18 AC 24 ms
18,416 KB
testcase_19 AC 238 ms
19,948 KB
testcase_20 AC 260 ms
20,300 KB
testcase_21 AC 248 ms
20,236 KB
testcase_22 AC 280 ms
20,428 KB
testcase_23 AC 286 ms
20,592 KB
testcase_24 AC 112 ms
19,112 KB
testcase_25 AC 12 ms
18,108 KB
testcase_26 AC 21 ms
18,344 KB
testcase_27 AC 195 ms
19,536 KB
testcase_28 AC 207 ms
19,484 KB
testcase_29 AC 185 ms
19,444 KB
testcase_30 AC 127 ms
18,956 KB
testcase_31 AC 33 ms
18,372 KB
testcase_32 AC 290 ms
19,964 KB
testcase_33 AC 8 ms
18,240 KB
testcase_34 AC 347 ms
20,388 KB
testcase_35 AC 118 ms
18,848 KB
testcase_36 AC 6 ms
18,216 KB
testcase_37 AC 7 ms
18,192 KB
testcase_38 AC 6 ms
18,176 KB
testcase_39 AC 6 ms
18,188 KB
testcase_40 AC 7 ms
18,184 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

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"));
}

// Segment Tree. This data structure is useful for fast folding on intervals of an array
// whose elements are elements of monoid I. Note that constructing this tree requires the identity
// element of I and the operation of I.
// Verified by: yukicoder No. 2220 (https://yukicoder.me/submissions/841554)
struct SegTree<I, BiOp> {
    n: usize,
    orign: usize,
    dat: Vec<I>,
    op: BiOp,
    e: I,
}

impl<I, BiOp> SegTree<I, BiOp>
    where BiOp: Fn(I, I) -> I,
          I: Copy {
    pub fn new(n_: usize, op: BiOp, e: I) -> Self {
        let mut n = 1;
        while n < n_ { n *= 2; } // n is a power of 2
        SegTree {n: n, orign: n_, dat: vec![e; 2 * n - 1], op: op, e: e}
    }
    // ary[k] <- v
    pub fn update(&mut self, idx: usize, v: I) {
        debug_assert!(idx < self.orign);
        let mut k = idx + self.n - 1;
        self.dat[k] = v;
        while k > 0 {
            k = (k - 1) / 2;
            self.dat[k] = (self.op)(self.dat[2 * k + 1], self.dat[2 * k + 2]);
        }
    }
    // [a, b) (half-inclusive)
    // http://proc-cpuinfo.fixstars.com/2017/07/optimize-segment-tree/
    #[allow(unused)]
    pub fn query(&self, rng: std::ops::Range<usize>) -> I {
        let (mut a, mut b) = (rng.start, rng.end);
        debug_assert!(a <= b);
        debug_assert!(b <= self.orign);
        let mut left = self.e;
        let mut right = self.e;
        a += self.n - 1;
        b += self.n - 1;
        while a < b {
            if (a & 1) == 0 {
                left = (self.op)(left, self.dat[a]);
            }
            if (b & 1) == 0 {
                right = (self.op)(self.dat[b - 1], right);
            }
            a = a / 2;
            b = (b - 1) / 2;
        }
        (self.op)(left, right)
    }
}

fn main() {
    input! {
        n: usize,
        a: [usize; n],
    }
    const W: usize = 1_000_001;
    const INF: i64 = 1 << 58;
    let mut st = SegTree::new(W, min, INF);
    st.update(a[n - 1], 0);
    for i in (0..n - 1).rev() {
        let x = a[i];
        let mut me = INF;
        for y in 1..=(W - 1) / x {
            let val = st.query(max(x * y, x + 1)..min(x * y + x, W));
            me = min(me, val + x as i64 * y as i64);
        }
        st.update(x, me);
    }
    let mut ans: i64 = a.iter().sum::<usize>() as _;
    ans -= st.query(a[0]..a[0] + 1);
    println!("{}", ans);
}
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