結果
| 問題 |
No.2456 Stamp Art
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2023-09-02 00:05:29 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 3,055 bytes |
| コンパイル時間 | 13,125 ms |
| コンパイル使用メモリ | 378,880 KB |
| 実行使用メモリ | 49,152 KB |
| 最終ジャッジ日時 | 2025-01-03 13:44:54 |
| 合計ジャッジ時間 | 17,315 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 18 WA * 5 |
ソースコード
pub mod binary_search {
type T = usize;
pub fn binary_search(mut ok: T, mut ng: T, f: impl Fn(T) -> bool) -> T {
let cont = |ok: T, ng: T| {
let l = ok.min(ng);
let r = ok.max(ng);
l + 1 < r
};
while cont(ok, ng) {
let x = (ok + ng) / 2;
if f(x) {
ok = x;
} else {
ng = x;
}
}
ok
}
}
pub mod scanner {
pub struct Scanner {
buf: Vec<String>,
}
impl Scanner {
pub fn new() -> Self {
Self { buf: vec![] }
}
pub fn new_from(source: &str) -> Self {
let source = String::from(source);
let buf = Self::split(source);
Self { buf }
}
pub fn next<T: std::str::FromStr>(&mut self) -> T {
loop {
if let Some(x) = self.buf.pop() {
return x.parse().ok().expect("");
}
let mut source = String::new();
std::io::stdin().read_line(&mut source).expect("");
self.buf = Self::split(source);
}
}
fn split(source: String) -> Vec<String> {
source
.split_whitespace()
.rev()
.map(String::from)
.collect::<Vec<_>>()
}
}
}
use crate::{binary_search::binary_search, scanner::Scanner};
use std::io::Write;
fn main() {
let mut scanner = Scanner::new();
let out = std::io::stdout();
let mut out = std::io::BufWriter::new(out.lock());
let t: usize = 1;
for _ in 0..t {
solve(&mut scanner, &mut out);
}
}
fn solve(scanner: &mut Scanner, out: &mut std::io::BufWriter<std::io::StdoutLock>) {
let h: usize = scanner.next();
let w: usize = scanner.next();
let s: Vec<Vec<char>> = (0..h)
.map(|_| scanner.next::<String>().chars().map(|c| c).collect())
.collect();
let mut sum = vec![vec![0; w + 1]; h + 1];
for i in 1..=h {
for j in 1..=w {
sum[i][j] = sum[i - 1][j] + sum[i][j - 1] - sum[i - 1][j - 1]
+ if s[i - 1][j - 1] == '#' { 1 } else { 0 };
}
}
let ans = binary_search(1, h.min(w) + 1, |k| {
let mut paint = vec![0; w];
for i in 0..h - k + 1 {
let mut now = vec![0; w + 1];
let i2 = i + k;
for j in 0..w - k + 1 {
let j2 = j + k;
let count = sum[i2][j2] - sum[i][j2] - sum[i2][j] + sum[i][j];
if count == k * k {
now[j] += 1;
now[j2] -= 1;
}
}
for j in 0..w {
if now[j] > 0 {
paint[j] = k;
}
if s[i][j] == '#' && paint[j] == 0 {
return false;
}
now[j + 1] += now[j];
}
}
true
});
writeln!(out, "{}", ans).unwrap();
}