結果

問題 No.2037 NAND Pyramid
コンテスト
ユーザー koba-e964
提出日時 2023-08-31 22:59:12
言語 Rust
(1.83.0 + proconio)
結果
AC  
実行時間 9 ms / 2,000 ms
コード長 2,771 bytes
コンパイル時間 15,002 ms
コンパイル使用メモリ 379,480 KB
実行使用メモリ 5,344 KB
最終ジャッジ日時 2025-01-03 04:58:21
合計ジャッジ時間 16,119 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge3
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 * 4
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 macro definition: `puts`
  --> src/main.rs:66:18
   |
66 |     macro_rules! puts {($($format:tt)*) => (let _ = write!(out,$($format)*););}
   |                  ^^^^
   |
   = note: `#[warn(unused_macros)]` on by default

warning: unused import: `Write`
 --> src/main.rs:5:15
  |
5 | use std::io::{Write, BufWriter};
  |               ^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default

warning: unused variable: `out`
  --> src/main.rs:65:13
   |
65 |     let mut out = BufWriter::new(out.lock());
   |             ^^^ help: if this is intentional, prefix it with an underscore: `_out`
   |
   = note: `#[warn(unused_variables)]` on by default

warning: variable does not need to be mutable
  --> src/main.rs:65:9
   |
65 |     let mut out = BufWriter::new(out.lock());
   |         ----^^^
   |         |
   |         help: remove this `mut`
   |
   = note: `#[warn(unused_mut)]` on by default

warning: trait `Change` is never used
  --> src/main.rs:46:7
   |
46 | trait Change { fn chmax(&mut self, x: Self); fn chmin(&mut self, x: Self); }
   |       ^^^^^^
   |
   = note: `#[warn(dead_code)]` on by default

ソースコード

diff # 

#[allow(unused_imports)]
use std::cmp::*;
#[allow(unused_imports)]
use std::collections::*;
use std::io::{Write, BufWriter};
// 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; } }
}

fn one_step(s: Vec<char>) -> Vec<char> {
    let n = s.len();
    let mut ans = vec!['1'; n - 1];
    for i in 0..n - 1 {
        if s[i] == '1' && s[i + 1] == '1' {
            ans[i] = '0';
        }
    }
    ans
}

fn main() {
    let out = std::io::stdout();
    let mut out = BufWriter::new(out.lock());
    macro_rules! puts {($($format:tt)*) => (let _ = write!(out,$($format)*););}
    #[allow(unused)]
    macro_rules! putvec {
        ($v:expr) => {
            for i in 0..$v.len() {
                puts!("{}{}", $v[i], if i + 1 == $v.len() {"\n"} else {" "});
            }
        }
    }
    input! {
        n: usize, k: usize,
        s: chars,
    }
    let med = if (k + n) % 2 == 1 { n - 1 } else { n };
    let mut s = s;
    if med < n {
        s = one_step(s);
    }
    assert_eq!((k + med) % 2, 0);
    if k < med {
        for i in 1..s.len() - 1 {
            if s[i - 1..i + 2] == ['0', '1', '0'] {
                s[i] = '0';
            }
        }
    }
    let x = (med - k) / 2;
    let ans: String = s[x..s.len() - x].iter().cloned().collect();
    println!("{}", ans);
}
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