結果
| 問題 |
No.1894 Delete AB
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2022-05-18 17:53:28 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
AC
|
| 実行時間 | 31 ms / 2,000 ms |
| コード長 | 4,043 bytes |
| コンパイル時間 | 13,132 ms |
| コンパイル使用メモリ | 398,892 KB |
| 実行使用メモリ | 6,944 KB |
| 最終ジャッジ日時 | 2024-09-16 20:00:26 |
| 合計ジャッジ時間 | 14,228 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge6 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 |
| other | AC * 14 |
コンパイルメッセージ
warning: unused variable: `n` --> src/main.rs:8:13 | 8 | let n: usize = sc.cin(); | ^ help: if this is intentional, prefix it with an underscore: `_n` | = note: `#[warn(unused_variables)]` on by default
ソースコード
#![allow(unused_imports, unused_macros, dead_code)]
use std::{cmp::*, collections::*};
fn main() {
let mut sc = Scanner::new();
let n: usize = sc.cin();
for _ in 0..n {
let n: usize = sc.cin();
let s = sc.chars();
let rl = runlength(&s);
trace!(&rl);
let mut stack = vec![];
for &(chr, num) in rl.iter().rev() {
if let Some((chr0, num0)) = stack.pop() {
if chr == chr0 {
stack.push((chr, num + num0));
} else if chr == 'A' {
if num < num0 {
stack.push(('B', num0 - num));
} else {
stack.push(('B', 1));
stack.push(('A', 1 + num - num0));
}
} else {
stack.push((chr0, num0));
stack.push((chr, num));
}
} else {
stack.push((chr, num));
}
}
trace!(&stack);
for &(chr, num) in stack.iter().rev() {
for _ in 0..num {
print!("{}", chr);
}
}
println!();
}
}
// @string/runlength
/// String Compression - Run-Length
pub fn runlength<A: Copy + PartialEq>(xs: &Vec<A>) -> Vec<(A, usize)> {
let m = xs.len();
if m == 0 {
return vec![];
}
let mut count = 1;
let mut result = vec![];
for i in 0..m {
if i > 0 {
if xs[i - 1] == xs[i] {
count += 1;
} else {
count = 1;
}
}
if i == m - 1 || xs[i] != xs[i + 1] {
result.push((xs[i], count));
}
}
result
}
// {{{
use std::io::{self, Write};
use std::str::FromStr;
pub struct Scanner {
stdin: io::Stdin,
buffer: VecDeque<String>,
}
impl Scanner {
pub fn new() -> Self {
Self {
stdin: io::stdin(),
buffer: VecDeque::new(),
}
}
pub fn cin<T: FromStr>(&mut self) -> T {
while self.buffer.is_empty() {
let mut line = String::new();
let _ = self.stdin.read_line(&mut line);
for w in line.split_whitespace() {
self.buffer.push_back(String::from(w));
}
}
self.buffer.pop_front().unwrap().parse::<T>().ok().unwrap()
}
pub fn usize1(&mut self) -> usize {
self.cin::<usize>() - 1
}
pub fn chars(&mut self) -> Vec<char> {
self.cin::<String>().chars().collect()
}
pub fn vec<T: FromStr>(&mut self, n: usize) -> Vec<T> {
(0..n).map(|_| self.cin()).collect()
}
}
fn flush() {
std::io::stdout().flush().unwrap();
}
#[macro_export]
macro_rules! min {
(.. $x:expr) => {{
let mut it = $x.iter();
it.next().map(|z| it.fold(z, |x, y| min!(x, y)))
}};
($x:expr) => ($x);
($x:expr, $($ys:expr),*) => {{
let t = min!($($ys),*);
if $x < t { $x } else { t }
}}
}
#[macro_export]
macro_rules! max {
(.. $x:expr) => {{
let mut it = $x.iter();
it.next().map(|z| it.fold(z, |x, y| max!(x, y)))
}};
($x:expr) => ($x);
($x:expr, $($ys:expr),*) => {{
let t = max!($($ys),*);
if $x > t { $x } else { t }
}}
}
#[macro_export]
macro_rules! trace {
($x:expr) => {
#[cfg(debug_assertions)]
eprintln!(">>> {} = {:?}", stringify!($x), $x)
};
($($xs:expr),*) => { trace!(($($xs),*)) }
}
#[macro_export]
macro_rules! put {
(.. $x:expr) => {{
let mut it = $x.iter();
if let Some(x) = it.next() { print!("{}", x); }
for x in it { print!(" {}", x); }
println!("");
}};
($x:expr) => { println!("{}", $x) };
($x:expr, $($xs:expr),*) => { print!("{} ", $x); put!($($xs),*) }
}
#[macro_export]
macro_rules! ndarray {
($x:expr;) => {
$x
};
($x:expr; $size:expr $( , $rest:expr )*) => {
vec![ndarray!($x; $($rest),*); $size]
};
}
// }}}