結果

問題 No.2456 Stamp Art
ユーザー haihamabossuhaihamabossu
提出日時 2023-09-02 00:29:16
言語 Rust
(1.77.0)
結果
AC  
実行時間 260 ms / 5,000 ms
コード長 3,170 bytes
コンパイル時間 3,250 ms
コンパイル使用メモリ 158,284 KB
実行使用メモリ 49,132 KB
最終ジャッジ日時 2023-09-02 11:22:08
合計ジャッジ時間 8,304 ms
ジャッジサーバーID
(参考情報)
judge15 / judge13
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 1 ms
4,380 KB
testcase_01 AC 1 ms
4,380 KB
testcase_02 AC 1 ms
4,380 KB
testcase_03 AC 224 ms
49,004 KB
testcase_04 AC 1 ms
4,380 KB
testcase_05 AC 1 ms
4,376 KB
testcase_06 AC 245 ms
49,120 KB
testcase_07 AC 141 ms
49,104 KB
testcase_08 AC 68 ms
49,132 KB
testcase_09 AC 176 ms
49,132 KB
testcase_10 AC 155 ms
49,068 KB
testcase_11 AC 204 ms
49,024 KB
testcase_12 AC 73 ms
49,112 KB
testcase_13 AC 260 ms
49,096 KB
testcase_14 AC 131 ms
49,040 KB
testcase_15 AC 197 ms
49,120 KB
testcase_16 AC 122 ms
25,480 KB
testcase_17 AC 1 ms
4,376 KB
testcase_18 AC 1 ms
4,376 KB
testcase_19 AC 126 ms
33,188 KB
testcase_20 AC 156 ms
49,132 KB
testcase_21 AC 190 ms
44,392 KB
testcase_22 AC 202 ms
49,128 KB
testcase_23 AC 8 ms
4,572 KB
testcase_24 AC 14 ms
5,880 KB
testcase_25 AC 1 ms
4,376 KB
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ソースコード

diff #

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![0isize; w];
        for i in 0..h {
            let mut now = vec![0; w + 1];
            if i + k <= h {
                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 as isize;
                }
                if s[i][j] == '#' && paint[j] <= 0 {
                    return false;
                }
                now[j + 1] += now[j];
                paint[j] -= 1;
            }
        }
        true
    });
    writeln!(out, "{}", ans).unwrap();
}
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