結果
問題 | No.1325 Subsequence Score |
ユーザー |
|
提出日時 | 2024-09-26 22:15:38 |
言語 | Rust (1.83.0 + proconio) |
結果 |
AC
|
実行時間 | 133 ms / 2,000 ms |
コード長 | 3,573 bytes |
コンパイル時間 | 15,570 ms |
コンパイル使用メモリ | 378,392 KB |
実行使用メモリ | 14,616 KB |
最終ジャッジ日時 | 2024-09-26 22:15:57 |
合計ジャッジ時間 | 19,094 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 28 |
ソースコード
use proconio::input;fn main() {input! {n:usize,a:[usize;n],}let mut dp = vec![ModInt::<MOD>::new(0); n + 1];let mut pow2 = ModInt::new(1);let two = ModInt::new(2);for i in 1..=n {if i == 1 {dp[i] = dp[i - 1] * two + ModInt::new(a[i - 1]);} else {dp[i] = dp[i - 1] * two + pow2 * ModInt::new((i + 1) * a[i - 1]);pow2 *= two;}}let ans = dp[n];println!("{}", ans);}const MOD: usize = 998244353;use modint::*;mod modint {use std::fmt;use std::ops;#[derive(Copy, Clone, PartialEq, Eq)]pub struct ModInt<const MOD: usize> {pub val: usize,}impl<const MOD: usize> ModInt<MOD> {pub fn new(val: usize) -> Self {Self { val: val % MOD }}pub fn pow(mut self, mut e: usize) -> Self {let mut res = Self::new(1);while 0 < e {if e & 1 != 0 {res *= self;}self *= self;e >>= 1;}res}}impl<const MOD: usize> From<usize> for ModInt<MOD> {fn from(value: usize) -> Self {Self { val: value % MOD }}}impl<const MOD: usize> fmt::Display for ModInt<MOD> {fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {write!(f, "{}", self.val)}}impl<const MOD: usize> fmt::Debug for ModInt<MOD> {fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {write!(f, "{}", self.val)}}impl<const MOD: usize> ops::Neg for ModInt<MOD> {type Output = Self;fn neg(self) -> Self::Output {Self {val: (MOD - self.val) % MOD,}}}impl<const MOD: usize> ops::Add for ModInt<MOD> {type Output = Self;fn add(self, rhs: Self) -> Self::Output {Self {val: (self.val + rhs.val) % MOD,}}}impl<const MOD: usize> ops::AddAssign for ModInt<MOD> {fn add_assign(&mut self, rhs: Self) {*self = *self + rhs;}}impl<const MOD: usize> ops::Mul for ModInt<MOD> {type Output = Self;fn mul(self, rhs: Self) -> Self::Output {Self {val: self.val * rhs.val % MOD,}}}impl<const MOD: usize> ops::MulAssign for ModInt<MOD> {fn mul_assign(&mut self, rhs: Self) {*self = *self * rhs;}}impl<const MOD: usize> ops::Sub for ModInt<MOD> {type Output = Self;fn sub(mut self, rhs: Self) -> Self::Output {if self.val < rhs.val {self.val += MOD;}Self {val: (self.val - rhs.val) % MOD,}}}impl<const MOD: usize> ops::SubAssign for ModInt<MOD> {fn sub_assign(&mut self, rhs: Self) {if self.val < rhs.val {self.val += MOD;}*self = *self - rhs;}}impl<const MOD: usize> ops::Div for ModInt<MOD> {type Output = Self;fn div(self, rhs: Self) -> Self {assert!(rhs.val != 0);self * rhs.pow(MOD - 2)}}impl<const MOD: usize> ops::DivAssign for ModInt<MOD> {fn div_assign(&mut self, rhs: Self) {*self = *self / rhs}}}