結果

問題 No.2430 Damage Zone
ユーザー naut3
提出日時 2023-08-25 00:08:36
言語 Rust
(1.83.0 + proconio)
結果
AC  
実行時間 39 ms / 2,000 ms
コード長 2,805 bytes
コンパイル時間 15,743 ms
コンパイル使用メモリ 378,964 KB
実行使用メモリ 17,920 KB
最終ジャッジ日時 2024-12-23 11:50:20
合計ジャッジ時間 15,021 ms
ジャッジサーバーID
(参考情報)
judge5 / judge2
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
other AC * 28
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 `Result` that must be used
  --> src/main.rs:72:5
   |
72 |     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

diff #
プレゼンテーションモードにする

#![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>()
};
($T: ty, $N: expr) => {
(0..$N).map(|_| scan.token::<$T>()).collect::<Vec<_>>()
};
}
const MOD: usize = 998_244_353;
let H = input!(usize);
let W = input!(usize);
let K = input!(usize);
let S = (0..H)
.map(|_| input!(String).chars().collect::<Vec<_>>())
.collect::<Vec<_>>();
let mut dp = vec![vec![vec![0; K]; W]; H];
dp[0][0][0] = 1;
for i in 0..H {
for j in 0..W {
for k in 0..K {
//
if j + 1 < W {
if S[i][j + 1] == '.' {
dp[i][j + 1][k] += dp[i][j][k];
dp[i][j + 1][k] %= MOD;
} else if S[i][j + 1] == 'o' {
if k + 1 < K {
dp[i][j + 1][k + 1] += dp[i][j][k];
dp[i][j + 1][k + 1] %= MOD;
}
}
}
//
if i + 1 < H {
if S[i + 1][j] == '.' {
dp[i + 1][j][k] += dp[i][j][k];
dp[i + 1][j][k] %= MOD;
} else if S[i + 1][j] == 'o' {
if k + 1 < K {
dp[i + 1][j][k + 1] += dp[i][j][k];
dp[i + 1][j][k + 1] %= MOD;
}
}
}
}
}
}
let mut ans = 0;
for k in 0..K {
ans += dp[H - 1][W - 1][k];
ans %= MOD;
}
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())
}
}
}
}
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