#345102 (Rust) No.312 置換処理

提出ソース

結果

問題	No.312 置換処理
ユーザー	MasuqaT
提出日時	2019-05-04 22:50:01
言語	Rust (1.77.0)
結果	AC
実行時間	27 ms / 2,000 ms
コード長	3,706 bytes
コンパイル時間	15,396 ms
コンパイル使用メモリ	391,564 KB
実行使用メモリ	10,240 KB
最終ジャッジ日時	2024-04-27 11:01:49
合計ジャッジ時間	16,259 ms
ジャッジサーバーID （参考情報）	judge4 / judge5

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 6,816 KB
testcase_01	AC	15 ms 7,552 KB
testcase_02	AC	27 ms 10,240 KB
testcase_03	AC	25 ms 10,112 KB
testcase_04	AC	1 ms 6,940 KB
testcase_05	AC	1 ms 6,944 KB
testcase_06	AC	11 ms 6,940 KB
testcase_07	AC	20 ms 9,088 KB
testcase_08	AC	14 ms 8,704 KB
testcase_09	AC	6 ms 6,944 KB
testcase_10	AC	8 ms 6,940 KB
testcase_11	AC	18 ms 8,704 KB
testcase_12	AC	8 ms 6,940 KB
testcase_13	AC	9 ms 9,472 KB
testcase_14	AC	7 ms 7,424 KB
testcase_15	AC	7 ms 6,944 KB
testcase_16	AC	5 ms 6,944 KB
testcase_17	AC	8 ms 7,936 KB
testcase_18	AC	8 ms 7,936 KB
testcase_19	AC	9 ms 9,088 KB
testcase_20	AC	9 ms 9,728 KB
testcase_21	AC	10 ms 9,856 KB
testcase_22	AC	1 ms 6,940 KB
testcase_23	AC	1 ms 6,940 KB
testcase_24	AC	1 ms 6,944 KB
testcase_25	AC	1 ms 6,940 KB
testcase_26	AC	1 ms 6,940 KB
testcase_27	AC	1 ms 6,940 KB
testcase_28	AC	1 ms 6,940 KB
testcase_29	AC	1 ms 6,944 KB
testcase_30	AC	3 ms 6,940 KB
testcase_31	AC	3 ms 6,940 KB
testcase_32	AC	3 ms 6,944 KB
testcase_33	AC	7 ms 6,940 KB
testcase_34	AC	8 ms 6,940 KB
testcase_35	AC	6 ms 6,944 KB
testcase_36	AC	2 ms 6,940 KB
testcase_37	AC	1 ms 6,944 KB
testcase_38	AC	1 ms 6,940 KB
testcase_39	AC	5 ms 6,944 KB
testcase_40	AC	2 ms 6,940 KB
testcase_41	AC	1 ms 6,944 KB
testcase_42	AC	2 ms 6,940 KB
testcase_43	AC	1 ms 6,940 KB
testcase_44	AC	1 ms 6,940 KB

権限があれば一括ダウンロードができます

コンパイルメッセージ

warning: unused `Result` that must be used
   --> src/main.rs:124:17
    |
124 |                 write!(writer, "{}", i);
    |                 ^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: this `Result` may be an `Err` variant, which should be handled
    = note: `#[warn(unused_must_use)]` on by default
    = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)

warning: unused `Result` that must be used
   --> src/main.rs:138:5
    |
138 |     write!(writer, "{}", if n % 2 == 0 && n / 2 != 2 { n / 2 } else { n });
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: this `Result` may be an `Err` variant, which should be handled
    = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)

ソースコード

raw source code

use std::io;
use std::io::{BufRead, Write};

macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
    (stdin = $s:expr, $($r:tt)*) => {
        let s = {
            let mut s = String::new();
            $s.read_to_string(&mut s).unwrap();
            s
        };
        let mut iter = s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
}

macro_rules! input_inner {
    ($iter:expr) => {};
    ($iter:expr, ) => {};

    ($iter:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($iter, $t);
        input_inner!{$iter $($r)*}
    };
}

macro_rules! read_value {
    ($iter:expr, ( $($t:tt),* )) => {
        ( $(read_value!($iter, $t)),* )
    };

    ($iter:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>()
    };

    ($iter:expr, chars) => {
        read_value!($iter, String).chars().collect::<Vec<char>>()
    };

    ($iter:expr, usize1) => {
        read_value!($iter, usize) - 1
    };

    ($iter:expr, $t:ty) => {
        $iter.next().unwrap().parse::<$t>().expect("Parse error")
    };
}

#[allow(unused_macros)]
macro_rules! assert_judge {
    ($method:ident, $input:expr, $expected:expr) => {
        {
            let input = $input.as_bytes();
            let mut output = Vec::new();

            $method(&input[..], &mut output);

            let output = String::from_utf8(output).expect("Not UTF-8");

            assert_eq!($expected, output);
        }
    };
}

#[allow(unused_macros)]
macro_rules! assert_judge_with_output {
    ($method:ident, $input:expr) => {
        {
            let input = $input.as_bytes();
            let mut output = Vec::new();

            $method(&input[..], &mut output);

            String::from_utf8(output).expect("Not UTF-8")
        }
    };
}

fn main() {
    let stdio = io::stdin();
    let input = stdio.lock();

    let output = io::stdout();

    process(input, output);
}

fn process<R, W>(mut reader: R, mut writer: W) -> () where
    R: BufRead,
    W: Write {
    input! {
        stdin = reader,
        n: usize
    }

    let rt_n = (n as f64).sqrt();
    let limit = rt_n.ceil() as usize;

//    let mut vec: Vec<_> = (3..limit + 1).collect();
//
//    for p in 3..limit + 1 {
//        vec.retain(|&x| x <= p || x % p != 0);
//    }
//
//    for p in vec {
//        if n % p == 0 {
//            write!(writer, "{}", p);
//            return;
//        }
//    }
//
//    write!(writer, "{}", original_n);

    let mut least_primes = vec![0; limit + 1];

    least_primes[1] = 1;
    least_primes[2] = 2;
    for i in 3..limit + 1 {
        if least_primes[i] == 0 {
            if n % i == 0 {
                write!(writer, "{}", i);
                return;
            }

            least_primes[i] = i;

            for j in (2 * i..limit + 1).step_by(i) {
                if least_primes[j] == 0 {
                    least_primes[j] = i;
                }
            }
        }
    }

    write!(writer, "{}", if n % 2 == 0 && n / 2 != 2 { n / 2 } else { n });
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn sample1() {
        assert_judge!(process, "9", "3");
    }

    #[test]
    fn sample2() {
        assert_judge!(process, "30", "3");
    }

    #[test]
    fn sample3() {
        assert_judge!(process, "114514", "31");
    }

    #[test]
    fn challenge02() {
        assert_judge!(process, "999999999958", "499999999979");
    }

    #[test]
    fn system_test9() {
        assert_judge!(process, "842870279900", "4");
    }

    #[test]
    fn t2() {
        assert_judge!(process, "4", "4");
    }
}

yukicoder

結果

テストケース

コンパイルメッセージ

ソースコード