#747826 (Rust) No.1578 A × B × C

• 問題: No.1578 A × B × C
• ユーザー: manta1130
• 提出日時: 2022-03-23 23:02:07
• 言語: Rust (1.77.0)
• 結果: AC
• 実行時間: 1 ms / 2,000 ms
• コード長: 5,191 bytes
• コンパイル時間: 1,854 ms
• コンパイル使用メモリ: 183,936 KB
• 実行使用メモリ: 6,944 KB
• 最終ジャッジ日時: 2024-04-20 07:15:18
• 合計ジャッジ時間: 2,001 ms
• ジャッジサーバーID （参考情報）: judge5 / judge3

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	1 ms; 6,812 KB
testcase_02	AC	0 ms; 6,944 KB
testcase_03	AC	1 ms; 6,944 KB
testcase_04	AC	1 ms; 6,940 KB
testcase_05	AC	1 ms; 6,944 KB
testcase_06	AC	0 ms; 6,940 KB
testcase_07	AC	1 ms; 6,940 KB
testcase_08	AC	1 ms; 6,940 KB
testcase_09	AC	0 ms; 6,944 KB
testcase_10	AC	1 ms; 6,940 KB
testcase_11	AC	1 ms; 6,944 KB
testcase_12	AC	0 ms; 6,944 KB
testcase_13	AC	1 ms; 6,944 KB
testcase_14	AC	1 ms; 6,944 KB
testcase_15	AC	1 ms; 6,944 KB
testcase_16	AC	1 ms; 6,940 KB
testcase_17	AC	1 ms; 6,940 KB
testcase_18	AC	0 ms; 6,940 KB
testcase_19	AC	1 ms; 6,940 KB
testcase_20	AC	1 ms; 6,944 KB
testcase_21	AC	1 ms; 6,944 KB
testcase_22	AC	1 ms; 6,944 KB
testcase_23	AC	0 ms; 6,940 KB
testcase_24	AC	1 ms; 6,944 KB

コンパイルメッセージ

warning: constant `m` should have an upper case name
  --> main.rs:22:7
   |
22 | const m: usize = 1_000_000_007;
   |       ^ help: convert the identifier to upper case: `M`
   |
   = note: `#[warn(non_upper_case_globals)]` on by default

warning: 1 warning emitted

ソースコード

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

fn modpow(mut s: usize, mut n: usize, p: usize) -> usize {
    if p == 0 {
        return 1;
    }
    let mut t = s;
    s = 1;
    while n > 0 {
        if n & 1 != 0 {
            s *= t;
            s %= p;
        }
        n >>= 1;
        t *= t;
        t %= p;
    }
    s
}

const m: usize = 1_000_000_007;

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

    inputv! {
        a:usize,b:usize,c:usize,
        k:usize,
    }

    let ans = ((a * b) % m * c) % m;
    let p = modpow(2, k, m - 1);

    writeln!(out, "{}", modpow(ans, p, m)).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<_>>()
        }
    }
}