結果
問題 | No.697 池の数はいくつか |
ユーザー | hatoo |
提出日時 | 2018-08-08 13:43:48 |
言語 | Rust (1.77.0 + proconio) |
結果 |
CE
(最新)
AC
(最初)
|
実行時間 | - |
コード長 | 4,065 bytes |
コンパイル時間 | 12,152 ms |
コンパイル使用メモリ | 380,216 KB |
最終ジャッジ日時 | 2024-11-15 04:47:46 |
合計ジャッジ時間 | 13,646 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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コンパイルエラー時のメッセージ・ソースコードは、提出者また管理者しか表示できないようにしております。(リジャッジ後のコンパイルエラーは公開されます)
ただし、clay言語の場合は開発者のデバッグのため、公開されます。
ただし、clay言語の場合は開発者のデバッグのため、公開されます。
コンパイルメッセージ
error[E0782]: trait objects must include the `dyn` keyword --> src/main.rs:64:63 | 64 | fn adjacent4(x: usize, y: usize, sx: usize, sy: usize) -> Box<Iterator<Item = (usize, usize)>> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: add `dyn` keyword before this trait | 64 | fn adjacent4(x: usize, y: usize, sx: usize, sy: usize) -> Box<dyn Iterator<Item = (usize, usize)>> { | +++ For more information about this error, try `rustc --explain E0782`. error: could not compile `main` (bin "main") due to 1 previous error
ソースコード
#[doc = " https://github.com/hatoo/competitive-rust-snippets"] #[allow(unused_imports)] use std::cmp::{max, min, Ordering}; #[allow(unused_imports)] use std::collections::{BTreeMap, BTreeSet, BinaryHeap, HashMap, HashSet, VecDeque}; #[allow(unused_imports)] use std::io::{stdin, stdout, BufWriter, Write}; #[allow(unused_imports)] use std::iter::FromIterator; mod util { use std::fmt::Debug; use std::io::{stdin, stdout, BufWriter, StdoutLock}; use std::str::FromStr; #[allow(dead_code)] pub fn line() -> String { let mut line: String = String::new(); stdin().read_line(&mut line).unwrap(); line.trim().to_string() } #[allow(dead_code)] pub fn chars() -> Vec<char> { line().chars().collect() } #[allow(dead_code)] pub fn gets<T: FromStr>() -> Vec<T> where <T as FromStr>::Err: Debug, { let mut line: String = String::new(); stdin().read_line(&mut line).unwrap(); line.split_whitespace() .map(|t| t.parse().unwrap()) .collect() } #[allow(dead_code)] pub fn with_bufwriter<F: FnOnce(BufWriter<StdoutLock>) -> ()>(f: F) { let out = stdout(); let writer = BufWriter::new(out.lock()); f(writer) } } #[allow(unused_macros)] macro_rules ! get { ( $ t : ty ) => { { let mut line : String = String :: new ( ) ; stdin ( ) . read_line ( & mut line ) . unwrap ( ) ; line . trim ( ) . parse ::<$ t > ( ) . unwrap ( ) } } ; ( $ ( $ t : ty ) ,* ) => { { let mut line : String = String :: new ( ) ; stdin ( ) . read_line ( & mut line ) . unwrap ( ) ; let mut iter = line . split_whitespace ( ) ; ( $ ( iter . next ( ) . unwrap ( ) . parse ::<$ t > ( ) . unwrap ( ) , ) * ) } } ; ( $ t : ty ; $ n : expr ) => { ( 0 ..$ n ) . map ( | _ | get ! ( $ t ) ) . collect ::< Vec < _ >> ( ) } ; ( $ ( $ t : ty ) ,*; $ n : expr ) => { ( 0 ..$ n ) . map ( | _ | get ! ( $ ( $ t ) ,* ) ) . collect ::< Vec < _ >> ( ) } ; ( $ t : ty ;; ) => { { let mut line : String = String :: new ( ) ; stdin ( ) . read_line ( & mut line ) . unwrap ( ) ; line . split_whitespace ( ) . map ( | t | t . parse ::<$ t > ( ) . unwrap ( ) ) . collect ::< Vec < _ >> ( ) } } ; ( $ t : ty ;; $ n : expr ) => { ( 0 ..$ n ) . map ( | _ | get ! ( $ t ;; ) ) . collect ::< Vec < _ >> ( ) } ; } #[allow(unused_macros)] macro_rules ! debug { ( $ ( $ a : expr ) ,* ) => { eprintln ! ( concat ! ( $ ( stringify ! ( $ a ) , " = {:?}, " ) ,* ) , $ ( $ a ) ,* ) ; } } const BIG_STACK_SIZE: bool = true; #[allow(dead_code)] fn main() { use std::thread; if BIG_STACK_SIZE { thread::Builder::new() .stack_size(32 * 1024 * 1024) .name("solve".into()) .spawn(solve) .unwrap() .join() .unwrap(); } else { solve(); } } #[allow(dead_code)] fn adjacent4(x: usize, y: usize, sx: usize, sy: usize) -> Box<Iterator<Item = (usize, usize)>> { static DXDY: [(isize, isize); 4] = [(-1, 0), (1, 0), (0, -1), (0, 1)]; Box::new(DXDY.iter().filter_map(move |&(dx, dy)| { let nx = x as isize + dx; let ny = y as isize + dy; if nx >= 0 && nx < sx as isize && ny >= 0 && ny < sy as isize { Some((nx as usize, ny as usize)) } else { None } })) } fn solve() { let (h, w) = get!(usize, usize); let mut a = get!(usize;; h); let mut ans = 0; for i in 0..h { for j in 0..w { if a[i][j] == 1 { ans += 1; let mut que = VecDeque::new(); que.push_back((i, j)); while let Some((i, j)) = que.pop_front() { if a[i][j] == 1 { a[i][j] = 0; for (i, j) in adjacent4(i, j, h, w) { if a[i][j] == 1 { que.push_back((i, j)); } } } } } } } println!("{}", ans); }