#586101 (Rust) No.1299 Random Array Score

• 問題: No.1299 Random Array Score
• ユーザー: fukafukatani
• 提出日時: 2020-11-28 00:53:51
• 言語: Rust (1.77.0 + proconio)
• 結果: AC
• 実行時間: 22 ms / 2,000 ms
• コード長: 5,750 bytes
• コンパイル時間: 12,893 ms
• コンパイル使用メモリ: 398,840 KB
• 実行使用メモリ: 9,184 KB
• 最終ジャッジ日時: 2024-07-26 21:31:54
• 合計ジャッジ時間: 15,376 ms
• ジャッジサーバーID （参考情報）: judge1 / judge2

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	1 ms; 5,248 KB
testcase_01	AC	1 ms; 5,248 KB
testcase_02	AC	1 ms; 5,248 KB
testcase_03	AC	20 ms; 7,932 KB
testcase_04	AC	19 ms; 7,748 KB
testcase_05	AC	16 ms; 6,824 KB
testcase_06	AC	14 ms; 6,140 KB
testcase_07	AC	14 ms; 6,472 KB
testcase_08	AC	19 ms; 7,744 KB
testcase_09	AC	1 ms; 5,376 KB
testcase_10	AC	9 ms; 5,376 KB
testcase_11	AC	3 ms; 5,376 KB
testcase_12	AC	13 ms; 6,080 KB
testcase_13	AC	19 ms; 7,708 KB
testcase_14	AC	13 ms; 6,116 KB
testcase_15	AC	14 ms; 6,152 KB
testcase_16	AC	14 ms; 6,272 KB
testcase_17	AC	4 ms; 5,376 KB
testcase_18	AC	9 ms; 5,376 KB
testcase_19	AC	10 ms; 5,376 KB
testcase_20	AC	6 ms; 5,376 KB
testcase_21	AC	1 ms; 5,376 KB
testcase_22	AC	3 ms; 5,376 KB
testcase_23	AC	13 ms; 6,128 KB
testcase_24	AC	15 ms; 6,688 KB
testcase_25	AC	14 ms; 6,116 KB
testcase_26	AC	1 ms; 5,376 KB
testcase_27	AC	4 ms; 5,376 KB
testcase_28	AC	3 ms; 5,376 KB
testcase_29	AC	5 ms; 5,376 KB
testcase_30	AC	13 ms; 6,056 KB
testcase_31	AC	5 ms; 5,376 KB
testcase_32	AC	19 ms; 7,568 KB
testcase_33	AC	22 ms; 9,184 KB
testcase_34	AC	9 ms; 5,892 KB
testcase_35	AC	22 ms; 9,184 KB
testcase_36	AC	9 ms; 5,892 KB

コンパイルメッセージ

warning: unused variable: `n`
  --> src/main.rs:20:10
   |
20 |     let (n, k) = (v[0], v[1]);
   |          ^ help: if this is intentional, prefix it with an underscore: `_n`
   |
   = note: `#[warn(unused_variables)]` on by default

warning: associated items `set_modulus` and `inv` are never used
  --> src/main.rs:46:8
   |
45 | impl Modulo {
   | ----------- associated items in this implementation
46 |     fn set_modulus(m: i128) {
   |        ^^^^^^^^^^^
...
76 |     fn inv(self) -> Modulo {
   |        ^^^
   |
   = note: `#[warn(dead_code)]` on by default

ソースコード

#![allow(unused_imports)]
use std::cmp::*;
use std::collections::*;
use std::io::Write;
use std::ops::Bound::*;

#[allow(unused_macros)]
macro_rules! debug {
    ($($e:expr),*) => {
        #[cfg(debug_assertions)]
        $({
            let (e, mut err) = (stringify!($e), std::io::stderr());
            writeln!(err, "{} = {:?}", e, $e).unwrap()
        })*
    };
}

fn main() {
    let v = read_vec::<i128>();
    let (n, k) = (v[0], v[1]);
    let a = read_vec::<i128>()
        .iter()
        .map(|&x| Modulo(x))
        .sum::<Modulo>();
    let ans = a * Modulo(2).pow(k);
    println!("{}", ans);
}

fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}

fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    read::<String>()
        .split_whitespace()
        .map(|e| e.parse().ok().unwrap())
        .collect()
}

#[derive(Clone, Copy, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
struct Modulo(i128);
static mut MODULUS: i128 = 998244353;
impl Modulo {
    fn set_modulus(m: i128) {
        unsafe {
            MODULUS = m;
        }
    }
    fn get_modulus() -> i128 {
        unsafe { MODULUS }
    }
    fn new(x: i128) -> Modulo {
        let m = Modulo::get_modulus();
        if x < 0 {
            Modulo(x % m + m)
        } else if x < m {
            Modulo(x)
        } else {
            Modulo(x % m)
        }
    }
    fn pow(self, p: i128) -> Modulo {
        if p == 0 {
            Modulo(1)
        } else {
            let mut t = self.pow(p / 2);
            t *= t;
            if p & 1 == 1 {
                t *= self;
            }
            t
        }
    }
    fn inv(self) -> Modulo {
        self.pow(Modulo::get_modulus() - 2)
    }
}
impl std::fmt::Display for Modulo {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        self.0.fmt(f)
    }
}
impl std::ops::AddAssign for Modulo {
    fn add_assign(&mut self, other: Modulo) {
        let m = Modulo::get_modulus();
        self.0 += other.0;
        if self.0 >= m {
            self.0 -= m;
        }
    }
}
impl std::ops::MulAssign for Modulo {
    fn mul_assign(&mut self, other: Modulo) {
        let m = Modulo::get_modulus();
        self.0 *= other.0;
        self.0 %= m;
    }
}
impl std::ops::SubAssign for Modulo {
    fn sub_assign(&mut self, other: Modulo) {
        let m = Modulo::get_modulus();
        self.0 += m - other.0;
        if self.0 >= m {
            self.0 -= m;
        }
    }
}
macro_rules! impl_modulo_ops {
    ($imp:ident, $method:ident, $assign_imp:ident, $assign_method:ident) => {
        impl<'a> std::ops::$assign_imp<&'a Modulo> for Modulo {
            fn $assign_method(&mut self, other: &'a Modulo) {
                std::ops::$assign_imp::$assign_method(self, *other);
            }
        }
        impl std::ops::$imp for Modulo {
            type Output = Modulo;
            fn $method(self, other: Modulo) -> Modulo {
                let mut x = self;
                std::ops::$assign_imp::$assign_method(&mut x, other);
                x
            }
        }
        impl<'a> std::ops::$imp<Modulo> for &'a Modulo {
            type Output = Modulo;
            fn $method(self, other: Modulo) -> Modulo {
                std::ops::$imp::$method(*self, other)
            }
        }
        impl<'a> std::ops::$imp<&'a Modulo> for Modulo {
            type Output = Modulo;
            fn $method(self, other: &'a Modulo) -> Modulo {
                std::ops::$imp::$method(self, *other)
            }
        }
        impl<'a, 'b> std::ops::$imp<&'b Modulo> for &'a Modulo {
            type Output = Modulo;
            fn $method(self, other: &'b Modulo) -> Modulo {
                std::ops::$imp::$method(*self, *other)
            }
        }
        impl std::ops::$assign_imp<i128> for Modulo {
            fn $assign_method(&mut self, other: i128) {
                std::ops::$assign_imp::$assign_method(self, Modulo::new(other));
            }
        }
        impl<'a> std::ops::$assign_imp<&'a i128> for Modulo {
            fn $assign_method(&mut self, other: &'a i128) {
                std::ops::$assign_imp::$assign_method(self, *other);
            }
        }
        impl std::ops::$imp<i128> for Modulo {
            type Output = Modulo;
            fn $method(self, other: i128) -> Modulo {
                let mut x = self;
                std::ops::$assign_imp::$assign_method(&mut x, other);
                x
            }
        }
        impl<'a> std::ops::$imp<&'a i128> for Modulo {
            type Output = Modulo;
            fn $method(self, other: &'a i128) -> Modulo {
                std::ops::$imp::$method(self, *other)
            }
        }
        impl<'a> std::ops::$imp<i128> for &'a Modulo {
            type Output = Modulo;
            fn $method(self, other: i128) -> Modulo {
                std::ops::$imp::$method(*self, other)
            }
        }
        impl<'a, 'b> std::ops::$imp<&'b i128> for &'a Modulo {
            type Output = Modulo;
            fn $method(self, other: &'b i128) -> Modulo {
                std::ops::$imp::$method(*self, *other)
            }
        }
    };
}
impl_modulo_ops!(Add, add, AddAssign, add_assign);
impl_modulo_ops!(Mul, mul, MulAssign, mul_assign);
impl_modulo_ops!(Sub, sub, SubAssign, sub_assign);

use std::iter::Sum;
impl Sum for Modulo {
    fn sum<I>(iter: I) -> Self
    where
        I: Iterator<Item = Modulo>,
    {
        iter.fold(Modulo(0), |a, b| a + b)
    }
}

impl<'a> Sum<&'a Modulo> for Modulo {
    fn sum<I>(iter: I) -> Self
    where
        I: Iterator<Item = &'a Self>,
    {
        iter.fold(Modulo(0), |a, b| a + b)
    }
}