結果

問題 No.1233 割り切れない気持ち
ユーザー tzyvrntzyvrn
提出日時 2020-09-19 16:22:19
言語 Rust
(1.83.0 + proconio)
結果
AC  
実行時間 67 ms / 3,153 ms
コード長 1,713 bytes
コンパイル時間 13,329 ms
コンパイル使用メモリ 377,656 KB
実行使用メモリ 14,540 KB
最終ジャッジ日時 2024-06-23 17:05:10
合計ジャッジ時間 16,089 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge1
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 2
other AC * 39
権限があれば一括ダウンロードができます
コンパイルメッセージ
warning: unused import: `HashSet`
 --> src/main.rs:1:33
  |
1 | use std::collections::{HashMap, HashSet};
  |                                 ^^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default

warning: use of deprecated method `core::str::<impl str>::trim_right`: superseded by `trim_end`
  --> src/main.rs:10:23
   |
10 |             let s = s.trim_right();
   |                       ^^^^^^^^^^
...
33 |     let n = getl!(usize);
   |             ------------ in this macro invocation
   |
   = note: `#[warn(deprecated)]` on by default
   = note: this warning originates in the macro `getl` (in Nightly builds, run with -Z macro-backtrace for more info)
help: replace the use of the deprecated method
   |
10 |             let s = s.trim_end();
   |                       ~~~~~~~~

warning: use of deprecated method `core::str::<impl str>::trim_right`: superseded by `trim_end`
  --> src/main.rs:22:19
   |
22 |         let s = s.trim_right();
   |                   ^^^^^^^^^^
...
34 |     let mut a = getl_vec!(usize);
   |                 ---------------- in this macro invocation
   |
   = note: this warning originates in the macro `getl_vec` (in Nightly builds, run with -Z macro-backtrace for more info)
help: replace the use of the deprecated method
   |
22 |         let s = s.trim_end();
   |                   ~~~~~~~~

warning: variable does not need to be mutable
  --> src/main.rs:34:9
   |
34 |     let mut a = getl_vec!(usize);
   |         ----^
   |         |
   |         help: remove this `mut`
   |
   = note: `#[warn(unused_mut)]` on by default

ソースコード

diff # 

use std::collections::{HashMap, HashSet};

//{{{
#[allow(unused_macros)]
macro_rules! getl {
    ( $( $t:ty ),* ) => {
        {
            let mut s = String::new();
            std::io::stdin().read_line(&mut s).unwrap();
            let s = s.trim_right();
            let mut ws = s.split_whitespace();
            ($(ws.next().unwrap().parse::<$t>().unwrap()),*)
        }
    };
}

#[allow(unused_macros)]
macro_rules! getl_vec {
    ( $t:ty ) => {{
        let mut s = String::new();
        std::io::stdin().read_line(&mut s).unwrap();
        let s = s.trim_right();
        s.split_whitespace()
            .map(|x| x.parse().unwrap())
            .collect::<Vec<$t>>()
    }};
}
//}}}

const MAX: usize = 300_000;

fn main() {
    let n = getl!(usize);
    let mut a = getl_vec!(usize);

    let mut c = vec![0usize; MAX];
    for a_i in a.iter().copied() {
        c[a_i] += 1;
    }

    let mut sc = vec![0usize];
    for c_i in c {
        let last = sc.last().copied().unwrap();
        sc.push(c_i + last);
    }
    let sc = sc;

    let mut map = HashMap::new();
    for a_i in a.iter().copied() {
        let entry = map.entry(a_i).or_insert(0usize);
        *entry += 1;
    }

    let s: usize = a.iter().sum();

    let mut ans = 0usize;
    for (a_i, c_i) in map {
        let mut now = s * c_i;
        let mut m = 0;
        while a_i * m < MAX {
            // dbg!(now, c_i, m, a_i, &sc[..=10]);
            if (m + 1) * a_i <= MAX {
                now -= c_i * m * a_i * (sc[(m + 1) * a_i] - sc[m * a_i]);
            } else {
                now -= c_i * m * a_i * (n - sc[m * a_i]);
            }
            m += 1;
        }
        ans += now;
    }
    println!("{}", ans);
}
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