結果
問題 | No.2426 Select Plus or Minus |
ユーザー | naut3 |
提出日時 | 2023-08-19 20:33:30 |
言語 | Rust (1.77.0 + proconio) |
結果 |
AC
|
実行時間 | 1 ms / 2,000 ms |
コード長 | 2,392 bytes |
コンパイル時間 | 12,069 ms |
コンパイル使用メモリ | 391,180 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-05-07 03:35:28 |
合計ジャッジ時間 | 14,290 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
(要ログイン)
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 | 1 ms
6,812 KB |
testcase_01 | AC | 1 ms
6,812 KB |
testcase_02 | AC | 1 ms
6,944 KB |
testcase_03 | AC | 1 ms
6,944 KB |
testcase_04 | AC | 1 ms
6,944 KB |
testcase_05 | AC | 1 ms
6,944 KB |
testcase_06 | AC | 1 ms
6,940 KB |
testcase_07 | AC | 1 ms
6,940 KB |
testcase_08 | AC | 1 ms
6,940 KB |
testcase_09 | AC | 0 ms
6,940 KB |
testcase_10 | AC | 1 ms
6,944 KB |
testcase_11 | AC | 1 ms
6,940 KB |
testcase_12 | AC | 1 ms
6,940 KB |
testcase_13 | AC | 1 ms
6,940 KB |
testcase_14 | AC | 1 ms
6,940 KB |
testcase_15 | AC | 1 ms
6,940 KB |
testcase_16 | AC | 1 ms
6,944 KB |
testcase_17 | AC | 1 ms
6,940 KB |
testcase_18 | AC | 1 ms
6,940 KB |
testcase_19 | AC | 1 ms
6,944 KB |
testcase_20 | AC | 1 ms
6,940 KB |
testcase_21 | AC | 1 ms
6,940 KB |
testcase_22 | AC | 0 ms
6,940 KB |
testcase_23 | AC | 1 ms
6,940 KB |
testcase_24 | AC | 0 ms
6,940 KB |
testcase_25 | AC | 0 ms
6,944 KB |
testcase_26 | AC | 1 ms
6,940 KB |
testcase_27 | AC | 1 ms
6,940 KB |
testcase_28 | AC | 1 ms
6,940 KB |
testcase_29 | AC | 1 ms
6,940 KB |
testcase_30 | AC | 1 ms
6,940 KB |
testcase_31 | AC | 1 ms
6,940 KB |
testcase_32 | AC | 1 ms
6,940 KB |
testcase_33 | AC | 1 ms
6,940 KB |
testcase_34 | AC | 1 ms
6,944 KB |
testcase_35 | AC | 1 ms
6,944 KB |
testcase_36 | AC | 1 ms
6,940 KB |
testcase_37 | AC | 1 ms
6,940 KB |
testcase_38 | AC | 0 ms
6,940 KB |
testcase_39 | AC | 1 ms
6,940 KB |
testcase_40 | AC | 1 ms
6,940 KB |
testcase_41 | AC | 1 ms
6,944 KB |
testcase_42 | AC | 0 ms
6,940 KB |
testcase_43 | AC | 1 ms
6,940 KB |
コンパイルメッセージ
warning: unused macro definition: `input_line` --> src/main.rs:16:18 | 16 | macro_rules! input_line { | ^^^^^^^^^^ | = note: `#[warn(unused_macros)]` on by default warning: unused `Result` that must be used --> src/main.rs:38:17 | 38 | writeln!(out, "{}\n{}", ops.len(), ops.iter().collect::<String>()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: this `Result` may be an `Err` variant, which should be handled = note: `#[warn(unused_must_use)]` on by default = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
ソースコード
#![allow(non_snake_case, unused_imports)] use std::io::{self, prelude::*}; use std::str; use std::time::Instant; fn main() { let (stdin, stdout) = (io::stdin(), io::stdout()); let mut scan = Scanner::new(stdin.lock()); let mut out = io::BufWriter::new(stdout.lock()); macro_rules! input { ($T: ty) => { scan.token::<$T>() }; } macro_rules! input_line { ($T: ty, $N: expr) => { (0..$N).map(|_| scan.token::<$T>()).collect::<Vec<_>>() }; } let time = Instant::now(); macro_rules! rnd_bool { () => { time.elapsed().as_micros() % 2 == 1 }; } let N = input!(usize); loop { let mut m = N; let mut ops = vec![]; for _ in 0..10000 { if m == 1 { writeln!(out, "{}\n{}", ops.len(), ops.iter().collect::<String>()); return; } if m % 2 == 0 { m /= 2; ops.push('/'); } else { let b = rnd_bool!(); if b { if 3 * m + 1 > 1_000_000_000_000_000_000 { break; } m = 3 * m + 1; ops.push('+'); } else { if 3 * m - 1 > 1_000_000_000_000_000_000 { break; } m = 3 * m - 1; ops.push('-'); } } } } } struct Scanner<R> { reader: R, buf_str: Vec<u8>, buf_iter: str::SplitWhitespace<'static>, } impl<R: BufRead> Scanner<R> { fn new(reader: R) -> Self { Self { reader, buf_str: vec![], buf_iter: "".split_whitespace(), } } fn token<T: str::FromStr>(&mut self) -> T { loop { if let Some(token) = self.buf_iter.next() { return token.parse().ok().expect("Failed parse"); } self.buf_str.clear(); self.reader .read_until(b'\n', &mut self.buf_str) .expect("Failed read"); self.buf_iter = unsafe { let slice = str::from_utf8_unchecked(&self.buf_str); std::mem::transmute(slice.split_whitespace()) } } } }