#763875 (Rust) No.1943 消えたAGCT(1)

• 問題: No.1943 消えたAGCT(1)
• ユーザー: manta1130
• 提出日時: 2022-05-20 23:10:23
• 言語: Rust (1.77.0)
• 結果: AC
• 実行時間: 10 ms / 2,000 ms
• コード長: 5,645 bytes
• コンパイル時間: 14,106 ms
• コンパイル使用メモリ: 174,144 KB
• 実行使用メモリ: 5,208 KB
• 最終ジャッジ日時: 2023-10-20 14:03:04
• 合計ジャッジ時間: 2,472 ms
• ジャッジサーバーID （参考情報）: judge12 / judge15

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	1 ms; 4,348 KB
testcase_01	AC	1 ms; 4,348 KB
testcase_02	AC	1 ms; 4,348 KB
testcase_03	AC	1 ms; 4,348 KB
testcase_04	AC	0 ms; 4,348 KB
testcase_05	AC	0 ms; 4,348 KB
testcase_06	AC	1 ms; 4,348 KB
testcase_07	AC	1 ms; 4,348 KB
testcase_08	AC	1 ms; 4,348 KB
testcase_09	AC	6 ms; 5,208 KB
testcase_10	AC	5 ms; 5,208 KB
testcase_11	AC	6 ms; 5,208 KB
testcase_12	AC	6 ms; 5,208 KB
testcase_13	AC	4 ms; 4,348 KB
testcase_14	AC	1 ms; 4,348 KB
testcase_15	AC	8 ms; 5,052 KB
testcase_16	AC	6 ms; 4,372 KB
testcase_17	AC	7 ms; 4,456 KB
testcase_18	AC	9 ms; 5,208 KB
testcase_19	AC	8 ms; 5,208 KB
testcase_20	AC	9 ms; 5,208 KB
testcase_21	AC	9 ms; 5,208 KB
testcase_22	AC	9 ms; 5,208 KB
testcase_23	AC	10 ms; 5,208 KB
testcase_24	AC	7 ms; 5,208 KB
testcase_25	AC	7 ms; 5,208 KB
testcase_26	AC	7 ms; 5,208 KB

コンパイルメッセージ

warning: unused variable: `n`
 --> Main.rs:9:9
  |
9 |         n:usize,
  |         ^ help: if this is intentional, prefix it with an underscore: `_n`
  |
  = note: `#[warn(unused_variables)]` on by default

warning: 1 warning emitted

ソースコード

#[allow(unused_imports)]
use std::io::{stdout, BufWriter, Write};

fn main() {
    let out = stdout();
    let mut out = BufWriter::new(out.lock());

    inputv! {
        n:usize,
    }
    let mut s = input_line_str()
        .to_charvec()
        .iter()
        .map(|&q| q == 'A' || q == 'G' || q == 'C' || q == 'T')
        .collect::<Vec<_>>();

    s.insert(0, false);

    let mut count = s.iter().filter(|&&q| q).count();

    let mut l = count;
    let mut r = count;
    let mut left = true;

    let mut ans = 0;

    while count > 0 {
        if left {
            if s[l] {
                if l == r {
                    r += 1;
                }
                count -= 1;
            } else {
                if l == r {
                    r += 1;
                }
                left = false;
            }
            if l != 0 {
                l -= 1;
            }
        } else {
            if s[r] {
                count -= 1;
                left = true;
            } else {
            }
            r += 1;
        }

        ans += 1;
    }
    writeln!(out, "{}", ans).unwrap();
}

//https://github.com/manta1130/competitive-template-rs

use input::*;

pub mod input {
    use std::cell::RefCell;
    use std::io;
    pub const SPLIT_DELIMITER: char = ' ';
    pub use std::io::prelude::*;

    thread_local! {
        pub static INPUT_BUFFER:RefCell<std::collections::VecDeque<String>>=RefCell::new(std::collections::VecDeque::new());
    }

    #[macro_export]
    macro_rules! input_internal {
        ($x:ident : $t:ty) => {
            INPUT_BUFFER.with(|p| {
                while p.borrow().len() == 0 {
                    let temp_str = input_line_str();
                    let mut split_result_iter = temp_str
                        .split(SPLIT_DELIMITER)
                        .map(|q| q.to_string())
                        .filter(|q| q.len() > 0)
                        .collect::<std::collections::VecDeque<_>>();
                    p.borrow_mut().append(&mut split_result_iter)
                }
            });
            let mut buf_split_result = String::new();
            INPUT_BUFFER.with(|p| buf_split_result = p.borrow_mut().pop_front().unwrap());
            let $x: $t = buf_split_result.parse().unwrap();
        };
        (mut $x:ident : $t:ty) => {
            INPUT_BUFFER.with(|p| {
                while p.borrow().len() == 0 {
                    let temp_str = input_line_str();
                    let mut split_result_iter = temp_str
                        .split(SPLIT_DELIMITER)
                        .map(|q| q.to_string())
                        .filter(|q| q.len() > 0)
                        .collect::<std::collections::VecDeque<_>>();
                    p.borrow_mut().append(&mut split_result_iter)
                }
            });
            let mut buf_split_result = String::new();
            INPUT_BUFFER.with(|p| buf_split_result = p.borrow_mut().pop_front().unwrap());
            let mut $x: $t = buf_split_result.parse().unwrap();
        };
    }

    pub fn input_buffer_is_empty() -> bool {
        let mut empty = false;
        INPUT_BUFFER.with(|p| {
            if p.borrow().len() == 0 {
                empty = true;
            }
        });
        empty
    }

    #[macro_export]
    macro_rules! inputv {
    ($i:ident : $t:ty) => {
        input_internal!{$i : $t}
    };
    (mut $i:ident : $t:ty) => {
        input_internal!{mut $i : $t}
    };
    ($i:ident : $t:ty $(,)*) => {
            input_internal!{$i : $t}
    };
    (mut $i:ident : $t:ty $(,)*) => {
            input_internal!{mut $i : $t}
    };
    (mut $i:ident : $t:ty,$($q:tt)*) => {
            input_internal!{mut $i : $t}
            inputv!{$($q)*}
    };
    ($i:ident : $t:ty,$($q:tt)*) => {
            input_internal!{$i : $t}
            inputv!{$($q)*}
    };
}

    pub fn input_all() {
        INPUT_BUFFER.with(|p| {
            if p.borrow().len() == 0 {
                let mut temp_str = String::new();
                std::io::stdin().read_to_string(&mut temp_str).unwrap();
                let mut split_result_iter = temp_str
                    .split_whitespace()
                    .map(|q| q.to_string())
                    .collect::<std::collections::VecDeque<_>>();
                p.borrow_mut().append(&mut split_result_iter)
            }
        });
    }

    pub fn input_line_str() -> String {
        let mut s = String::new();
        io::stdin().read_line(&mut s).unwrap();
        s.trim().to_string()
    }

    #[allow(clippy::match_wild_err_arm)]
    pub fn input_vector<T>() -> Vec<T>
    where
        T: std::str::FromStr,
    {
        let mut v: Vec<T> = Vec::new();

        let s = input_line_str();
        let split_result = s.split(SPLIT_DELIMITER);
        for z in split_result {
            let buf = match z.parse() {
                Ok(r) => r,
                Err(_) => panic!("Parse Error",),
            };
            v.push(buf);
        }
        v
    }

    #[allow(clippy::match_wild_err_arm)]
    pub fn input_vector_row<T>(n: usize) -> Vec<T>
    where
        T: std::str::FromStr,
    {
        let mut v = Vec::with_capacity(n);
        for _ in 0..n {
            let buf = match input_line_str().parse() {
                Ok(r) => r,
                Err(_) => panic!("Parse Error",),
            };
            v.push(buf);
        }
        v
    }

    pub trait ToCharVec {
        fn to_charvec(&self) -> Vec<char>;
    }

    impl ToCharVec for String {
        fn to_charvec(&self) -> Vec<char> {
            self.to_string().chars().collect::<Vec<_>>()
        }
    }
}