#724461 (Rust) No.1384 Bishop and Rook

• 問題: No.1384 Bishop and Rook
• ユーザー: koba-e964
• 提出日時: 2021-12-16 23:03:07
• 言語: Rust (1.83.0 + proconio)
• 結果: AC
• 実行時間: 78 ms / 2,000 ms
• コード長: 3,626 bytes
• コンパイル時間: 14,297 ms
• コンパイル使用メモリ: 376,204 KB
• 実行使用メモリ: 17,536 KB
• 最終ジャッジ日時: 2024-09-13 22:29:39
• 合計ジャッジ時間: 21,236 ms
• ジャッジサーバーID （参考情報）: judge3 / judge1

ファイルパターン	結果
sample	AC * 1
other	AC * 55

ソースコード

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#[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::<$t>().expect("Parse error"));
}
trait Change { fn chmax(&mut self, x: Self); fn chmin(&mut self, x: Self); }
impl<T: PartialOrd> Change for T {
    fn chmax(&mut self, x: T) { if *self < x { *self = x; } }
    fn chmin(&mut self, x: T) { if *self > x { *self = x; } }
}
fn main() {
    // In order to avoid potential stack overflow, spawn a new thread.
    let stack_size = 104_857_600; // 100 MB
    let thd = std::thread::Builder::new().stack_size(stack_size);
    thd.spawn(|| solve()).unwrap().join().unwrap();
}
fn solve() {
    let out = std::io::stdout();
    let mut out = BufWriter::new(out.lock());
    macro_rules! puts {($($format:tt)*) => (let _ = write!(out,$($format)*););}
    input! {
        t: usize,
        nm: [(usize, usize); t],
    }
    for (n, m) in nm {
        if (n, m) == (1, 1) {
            puts!("0\n1 1\n");
            continue;
        }
        if n % 2 != 0 || m % 2 != 0 {
            puts!("-1\n");
            continue;
        }
        let mut ans = vec![];
        for i in 0..n / 2 {
            if i % 2 == 0 {
                for j in 0..m / 2 - 1 {
                    ans.push((2 * i, 2 * j));
                    ans.push((2 * i + 1, 2 * j + 1));
                    ans.push((2 * i + 1, 2 * j));
                    ans.push((2 * i, 2 * j + 1));
                }
                let j = m / 2 - 1;
                ans.push((2 * i, 2 * j));
                ans.push((2 * i + 1, 2 * j + 1));
                ans.push((2 * i, 2 * j + 1));
                ans.push((2 * i + 1, 2 * j));
            } else {
                let j = m / 2 - 1;
                ans.push((2 * i, 2 * j));
                ans.push((2 * i + 1, 2 * j + 1));
                ans.push((2 * i, 2 * j + 1));
                ans.push((2 * i + 1, 2 * j));
                for j in (0..m / 2 - 1).rev() {
                    ans.push((2 * i + 1, 2 * j + 1));
                    ans.push((2 * i, 2 * j));
                    ans.push((2 * i, 2 * j + 1));
                    ans.push((2 * i + 1, 2 * j));
                }
            }
        }
        assert_eq!(ans.len(), n * m);
        puts!("{}\n", ans.len() - 1);
        for (a, b) in ans {
            puts!("{} {}\n", a + 1, b + 1);
        }
    }
}
 
 
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