結果
問題 | No.2401 Dirty Shoes and Stairs |
ユーザー |
![]() |
提出日時 | 2023-08-05 19:07:20 |
言語 | Rust (1.83.0 + proconio) |
結果 |
AC
|
実行時間 | 7 ms / 2,000 ms |
コード長 | 1,844 bytes |
コンパイル時間 | 14,400 ms |
コンパイル使用メモリ | 378,236 KB |
実行使用メモリ | 5,248 KB |
最終ジャッジ日時 | 2024-10-15 16:14:41 |
合計ジャッジ時間 | 15,032 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 30 |
コンパイルメッセージ
warning: unused `Result` that must be used --> src/main.rs:43:5 | 43 | writeln!(out, "{}", ans); | ^^^^^^^^^^^^^^^^^^^^^^^^ | = 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; 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 N = input!(usize); let M1 = input!(usize); let A = input_line!(usize, M1); let M2 = input!(usize); let B = input_line!(usize, M2); let mut is_dirty = vec![false; N + 1]; let mut now = 0; is_dirty[now] = true; for a in A { now += a; is_dirty[now] = true; } for b in B { now -= b; is_dirty[now] = true; } let ans: usize = is_dirty.iter().map(|&b| if b { 0 } else { 1 }).sum(); writeln!(out, "{}", ans); } 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()) } } } }