結果
問題 |
No.2541 Divide 01 String
|
ユーザー |
|
提出日時 | 2023-12-01 06:10:08 |
言語 | Rust (1.83.0 + proconio) |
結果 |
AC
|
実行時間 | 22 ms / 2,000 ms |
コード長 | 1,991 bytes |
コンパイル時間 | 13,104 ms |
コンパイル使用メモリ | 384,504 KB |
実行使用メモリ | 13,808 KB |
最終ジャッジ日時 | 2024-09-26 15:10:54 |
合計ジャッジ時間 | 14,460 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 20 |
コンパイルメッセージ
warning: unnecessary trailing semicolon --> src/main.rs:29:29 | 29 | let MOD:i64 = 998244353;; | ^ help: remove this semicolon | = note: `#[warn(redundant_semicolons)]` on by default warning: unused variable: `out` --> src/main.rs:14:13 | 14 | let mut out = io::BufWriter::new(stdout.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:14:9 | 14 | let mut out = io::BufWriter::new(stdout.lock()); | ----^^^ | | | help: remove this `mut` | = note: `#[warn(unused_mut)]` on by default
ソースコード
#![allow(non_snake_case, unused_imports, unused_must_use)] use std::io::{self, prelude::*}; use std::str; /* use proconio::input; use proconio::marker::Usize1; use proconio::marker::Chars; */ 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>() }; ($T: ty, $N: expr) => { (0..$N).map(|_| scan.token::<$T>()).collect::<Vec<_>>() }; } let n = input!(usize); let s = input!(String).chars().collect::<Vec<char>>(); let mut dp = vec![vec![0i64; 2]; n + 1]; dp[0][0] = 1; let MOD:i64 = 998244353;; for i in 1..=n { if s[i - 1] == '1' { dp[i][1] = dp[i - 1][0] + dp[i - 1][1]; dp[i][1] += dp[i - 1][1]; dp[i][1] %= MOD; } else { dp[i][0] = dp[i - 1][1] + dp[i - 1][0]; dp[i][1] += dp[i - 1][1]; dp[i][0] %= MOD; } } println!("{}", dp[n][1]); } // https://yukicoder.me/submissions/930858s 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()) } } } }