結果

問題 No.1299 Random Array Score
ユーザー cympfhcympfh
提出日時 2021-01-15 19:15:45
言語 Rust
(1.77.0 + proconio)
結果
AC  
実行時間 27 ms / 2,000 ms
コード長 7,182 bytes
コンパイル時間 11,185 ms
コンパイル使用メモリ 377,900 KB
実行使用メモリ 15,104 KB
最終ジャッジ日時 2024-05-04 20:39:58
合計ジャッジ時間 14,111 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge3
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 0 ms
5,248 KB
testcase_01 AC 0 ms
5,376 KB
testcase_02 AC 0 ms
5,376 KB
testcase_03 AC 26 ms
14,720 KB
testcase_04 AC 25 ms
14,336 KB
testcase_05 AC 20 ms
11,520 KB
testcase_06 AC 17 ms
10,368 KB
testcase_07 AC 18 ms
11,008 KB
testcase_08 AC 25 ms
14,336 KB
testcase_09 AC 2 ms
5,376 KB
testcase_10 AC 11 ms
6,656 KB
testcase_11 AC 4 ms
5,376 KB
testcase_12 AC 16 ms
10,112 KB
testcase_13 AC 25 ms
14,208 KB
testcase_14 AC 18 ms
10,240 KB
testcase_15 AC 18 ms
10,496 KB
testcase_16 AC 18 ms
10,368 KB
testcase_17 AC 4 ms
5,376 KB
testcase_18 AC 12 ms
7,168 KB
testcase_19 AC 14 ms
8,192 KB
testcase_20 AC 7 ms
5,376 KB
testcase_21 AC 1 ms
5,376 KB
testcase_22 AC 4 ms
5,376 KB
testcase_23 AC 18 ms
10,112 KB
testcase_24 AC 19 ms
11,648 KB
testcase_25 AC 17 ms
10,240 KB
testcase_26 AC 1 ms
5,376 KB
testcase_27 AC 5 ms
5,376 KB
testcase_28 AC 4 ms
5,376 KB
testcase_29 AC 6 ms
5,376 KB
testcase_30 AC 17 ms
9,856 KB
testcase_31 AC 6 ms
5,376 KB
testcase_32 AC 24 ms
13,952 KB
testcase_33 AC 26 ms
15,104 KB
testcase_34 AC 19 ms
14,528 KB
testcase_35 AC 27 ms
14,976 KB
testcase_36 AC 20 ms
14,408 KB
権限があれば一括ダウンロードができます

ソースコード

diff # 

#![allow(unused_imports, unused_macros, dead_code)]
use std::{cmp::*, collections::*};

fn main() {
    let mut sc = Scanner::new();
    let n: usize = sc.cin();
    let k: i64 = sc.cin();
    let xs: Vec<i64> = sc.vec(n);

    let s = mint!(xs.iter().sum());
    let ans = s * mint!(2).pow(k);
    put!(ans);
}

// @algebra/modint
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
pub struct ModInt(pub i64, pub i64); // (residual, modulo)

pub const MOD_1000000007: i64 = 1_000_000_007;
pub const MOD_998244353: i64 = 998_244_353;

impl ModInt {
    pub fn new(residual: i64, modulo: i64) -> ModInt {
        if residual >= modulo {
            ModInt(residual % modulo, modulo)
        } else if residual < 0 {
            ModInt((residual % modulo) + modulo, modulo)
        } else {
            ModInt(residual, modulo)
        }
    }
    pub fn unwrap(self) -> i64 {
        self.0
    }
    pub fn inv(self) -> Self {
        fn exgcd(r0: i64, a0: i64, b0: i64, r: i64, a: i64, b: i64) -> (i64, i64, i64) {
            if r > 0 {
                exgcd(r, a, b, r0 % r, a0 - r0 / r * a, b0 - r0 / r * b)
            } else {
                (a0, b0, r0)
            }
        }
        let (a, _, r) = exgcd(self.0, 1, 0, self.1, 0, 1);
        if r != 1 {
            panic!("{:?} has no inverse!", self);
        }
        ModInt(((a % self.1) + self.1) % self.1, self.1)
    }
    pub fn pow(self, n: i64) -> Self {
        if n < 0 {
            self.pow(-n).inv()
        } else if n == 0 {
            ModInt(1, self.1)
        } else if n == 1 {
            self
        } else {
            let mut x = (self * self).pow(n / 2);
            if n % 2 == 1 {
                x *= self
            }
            x
        }
    }
}
impl std::fmt::Display for ModInt {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        write!(f, "{}", self.0)
    }
}
impl std::ops::Neg for ModInt {
    type Output = Self;
    fn neg(self) -> Self {
        if self.0 == 0 {
            return self;
        }
        ModInt(self.1 - self.0, self.1)
    }
}
impl std::ops::Add<i64> for ModInt {
    type Output = Self;
    fn add(self, other: i64) -> Self {
        ModInt::new(self.0 + other, self.1)
    }
}
impl std::ops::Add for ModInt {
    type Output = Self;
    fn add(self, other: ModInt) -> Self {
        self + other.0
    }
}
impl std::ops::Add<ModInt> for i64 {
    type Output = ModInt;
    fn add(self, other: ModInt) -> ModInt {
        other + self
    }
}
impl std::ops::AddAssign<i64> for ModInt {
    fn add_assign(&mut self, other: i64) {
        self.0 = ModInt::new(self.0 + other, self.1).0;
    }
}
impl std::ops::AddAssign for ModInt {
    fn add_assign(&mut self, other: ModInt) {
        *self += other.0;
    }
}
impl std::ops::Sub<i64> for ModInt {
    type Output = Self;
    fn sub(self, other: i64) -> Self {
        ModInt::new(self.0 - other, self.1)
    }
}
impl std::ops::Sub for ModInt {
    type Output = Self;
    fn sub(self, other: ModInt) -> Self {
        self - other.0
    }
}
impl std::ops::Sub<ModInt> for i64 {
    type Output = ModInt;
    fn sub(self, other: ModInt) -> ModInt {
        ModInt::new(self - other.0, other.1)
    }
}
impl std::ops::SubAssign<i64> for ModInt {
    fn sub_assign(&mut self, other: i64) {
        self.0 = ModInt::new(self.0 - other, self.1).0;
    }
}
impl std::ops::SubAssign for ModInt {
    fn sub_assign(&mut self, other: ModInt) {
        *self -= other.0;
    }
}
impl std::ops::Mul<i64> for ModInt {
    type Output = Self;
    fn mul(self, other: i64) -> Self {
        ModInt::new(self.0 * other, self.1)
    }
}
impl std::ops::Mul for ModInt {
    type Output = Self;
    fn mul(self, other: ModInt) -> Self {
        self * other.0
    }
}
impl std::ops::Mul<ModInt> for i64 {
    type Output = ModInt;
    fn mul(self, other: ModInt) -> ModInt {
        other * self
    }
}
impl std::ops::MulAssign<i64> for ModInt {
    fn mul_assign(&mut self, other: i64) {
        self.0 = ModInt::new(self.0 * other, self.1).0;
    }
}
impl std::ops::MulAssign for ModInt {
    fn mul_assign(&mut self, other: ModInt) {
        *self *= other.0;
    }
}
impl std::ops::Div for ModInt {
    type Output = Self;
    fn div(self, other: ModInt) -> Self {
        self * other.inv()
    }
}
impl std::ops::Div<i64> for ModInt {
    type Output = Self;
    fn div(self, other: i64) -> Self {
        self / ModInt::new(other, self.1)
    }
}
impl std::ops::Div<ModInt> for i64 {
    type Output = ModInt;
    fn div(self, other: ModInt) -> ModInt {
        other.inv() * self
    }
}
impl std::ops::DivAssign for ModInt {
    fn div_assign(&mut self, other: ModInt) {
        self.0 = (*self / other).0;
    }
}
impl std::ops::DivAssign<i64> for ModInt {
    fn div_assign(&mut self, other: i64) {
        *self /= ModInt(other, self.1);
    }
}
#[macro_export]
macro_rules! mint {
    ($x:expr) => {
        ModInt::new($x, MOD_998244353)
    };
}
impl std::iter::Sum for ModInt {
    fn sum<I>(iter: I) -> Self
    where
        I: Iterator<Item = ModInt>,
    {
        let mut r = mint!(0);
        for x in iter {
            r = r + x
        }
        r
    }
}

// {{{
use std::io::{self, Write};
use std::str::FromStr;

struct Scanner {
    stdin: io::Stdin,
    buffer: VecDeque<String>,
}
impl Scanner {
    fn new() -> Self {
        Self {
            stdin: io::stdin(),
            buffer: VecDeque::new(),
        }
    }
    fn cin<T: FromStr>(&mut self) -> T {
        while self.buffer.is_empty() {
            let mut line = String::new();
            let _ = self.stdin.read_line(&mut line);
            for w in line.split_whitespace() {
                self.buffer.push_back(String::from(w));
            }
        }
        self.buffer.pop_front().unwrap().parse::<T>().ok().unwrap()
    }
    fn chars(&mut self) -> Vec<char> {
        self.cin::<String>().chars().collect()
    }
    fn vec<T: FromStr>(&mut self, n: usize) -> Vec<T> {
        (0..n).map(|_| self.cin()).collect()
    }
}
fn flush() {
    std::io::stdout().flush().unwrap();
}
#[macro_export]
macro_rules! min {
    (.. $x:expr) => {{
        let mut it = $x.iter();
        it.next().map(|z| it.fold(z, |x, y| min!(x, y)))
    }};
    ($x:expr) => ($x);
    ($x:expr, $($ys:expr),*) => {{
        let t = min!($($ys),*);
        if $x < t { $x } else { t }
    }}
}
#[macro_export]
macro_rules! max {
    (.. $x:expr) => {{
        let mut it = $x.iter();
        it.next().map(|z| it.fold(z, |x, y| max!(x, y)))
    }};
    ($x:expr) => ($x);
    ($x:expr, $($ys:expr),*) => {{
        let t = max!($($ys),*);
        if $x > t { $x } else { t }
    }}
}
#[macro_export]
macro_rules! trace {
    ($x:expr) => {
        #[cfg(debug_assertions)]
        eprintln!(">>> {} = {:?}", stringify!($x), $x)
    };
    ($($xs:expr),*) => { trace!(($($xs),*)) }
}
#[macro_export]
macro_rules! put {
    (.. $x:expr) => {{
        let mut it = $x.iter();
        if let Some(x) = it.next() { print!("{}", x); }
        for x in it { print!(" {}", x); }
        println!("");
    }};
    ($x:expr) => { println!("{}", $x) };
    ($x:expr, $($xs:expr),*) => { print!("{} ", $x); put!($($xs),*) }
}
// }}}
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