結果

問題 No.2940 Sigma Sigma Div Floor Problem
ユーザー naut3
提出日時 2024-10-20 22:45:24
言語 Rust
(1.83.0 + proconio)
結果
AC  
実行時間 78 ms / 6,000 ms
コード長 4,473 bytes
コンパイル時間 11,733 ms
コンパイル使用メモリ 405,644 KB
実行使用メモリ 6,820 KB
最終ジャッジ日時 2024-10-20 22:45:39
合計ジャッジ時間 13,820 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge1
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 4
other AC * 29 RE * 1
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 #
プレゼンテーションモードにする

#![allow(non_snake_case, unused_must_use, unused_imports)]
use std::io::{self, prelude::*};
type MInt = modint::ModInt<998244353>;
fn main() {
    let (stdin, stdout) = (io::read_to_string(io::stdin()).unwrap(), io::stdout());
    let (mut stdin, mut buffer) = (stdin.split_whitespace(), io::BufWriter::new(stdout.lock()));
    macro_rules! input {
        ($t: ty, $n: expr) => {
            (0..$n).map(|_| input!($t)).collect::<Vec<_>>()
        };
        ($t: ty) => {
            stdin.next().unwrap().parse::<$t>().unwrap()
        };
    }
    let N = input!(usize);
    assert!(N <= 10_000_000);
    let mut ans = MInt::default();
    for m in 1..=N {
        for j in 1..=N {
            let left = m * j;
            let mut right = m * j + j - 1;
            right = std::cmp::min(right, N);
            if left > N {
                break;
            }
            ans += m * (right - left + 1);
        }
    }
    writeln!(buffer, "{}", ans);
}
#[rustfmt::skip]
pub mod modint {use std::{fmt::*, ops::*};#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug, Default)]pub struct ModInt<const P: u32>(u32);impl<const P
    : u32> ModInt<P> { pub fn from_raw(value: u32) -> Self { assert!(value < P); Self(value) } pub fn pow(&self, mut x: u32) -> Self { let mut a = 
    *self; let mut r = Self::from_raw(1); while x > 0 { if x & 1 == 1 { r *= a; } a *= a; x >>= 1; } r } pub fn inv(&self) -> Self { self.pow(P - 2) 
    }}impl<const P: u32> Add for ModInt<P> { type Output = Self; fn add(self, rhs: Self) -> Self::Output { Self((self.0 + rhs.0) % P) }}impl<const P: 
    u32> Sub for ModInt<P> { type Output = Self; fn sub(self, rhs: Self) -> Self::Output { Self((P + self.0 - rhs.0) % P) }}impl<const P: u32> Mul for 
    ModInt<P> { type Output = Self; fn mul(self, rhs: Self) -> Self::Output { Self(((self.0 as u64 * rhs.0 as u64) % P as u64) as u32) }}impl<const P: 
    u32> Div for ModInt<P> { type Output = Self; fn div(self, rhs: Self) -> Self::Output { self * rhs.inv() }}impl<const P: u32> AddAssign for ModInt
    <P> { fn add_assign(&mut self, rhs: Self) { self.0 += rhs.0; self.0 %= P; }}impl<const P: u32> SubAssign for ModInt<P> { fn sub_assign(&mut self, 
    rhs: Self) { self.0 += P - rhs.0; self.0 %= P; }}impl<const P: u32> MulAssign for ModInt<P> { fn mul_assign(&mut self, rhs: Self) { *self = self
    .clone() * rhs; }}impl<const P: u32> DivAssign for ModInt<P> { fn div_assign(&mut self, rhs: Self) { *self *= rhs.inv() }}impl<const P: u32> Neg 
    for ModInt<P> { type Output = Self; fn neg(self) -> Self::Output { Self((P - self.0) % P) }}impl<const P: u32> Display for ModInt<P> { fn fmt
    (&self, f: &mut Formatter<'_>) -> Result { write!(f, "{}", self.0) }}macro_rules! impl_op_for_modint { ($($t: ty), *) => { $( impl<const P: u32> 
    From<$t> for ModInt<P> { fn from(value: $t) -> Self { Self((P as $t + value % P as $t) as u32 % P) } } impl<const P: u32> Add<$t> for ModInt<P> { 
    type Output = Self; fn add(self, rhs: $t) -> Self::Output { self + Self::from(rhs) } } impl<const P: u32> Add<ModInt<P>> for $t { type Output = 
    ModInt<P>; fn add(self, rhs: ModInt<P>) -> Self::Output { Self::Output::from(self) + rhs } } impl<const P: u32> Sub<$t> for ModInt<P> { type 
    Output = Self; fn sub(self, rhs: $t) -> Self::Output { self - Self::from(rhs) } } impl<const P: u32> Sub<ModInt<P>> for $t { type Output = ModInt
    <P>; fn sub(self, rhs: ModInt<P>) -> Self::Output { Self::Output::from(self) - rhs } } impl<const P: u32> Mul<$t> for ModInt<P> { type Output = 
    Self; fn mul(self, rhs: $t) -> Self::Output { self * Self::from(rhs) } } impl<const P: u32> Mul<ModInt<P>> for $t { type Output = ModInt<P>; fn 
    mul(self, rhs: ModInt<P>) -> Self::Output { Self::Output::from(self) * rhs } } impl<const P: u32> Div<$t> for ModInt<P> { type Output = Self; fn 
    div(self, rhs: $t) -> Self::Output { self / Self::from(rhs) } } impl<const P: u32> Div<ModInt<P>> for $t { type Output = ModInt<P>; fn div(self, 
    rhs: ModInt<P>) -> Self::Output { Self::Output::from(self) / rhs } } impl<const P: u32> AddAssign<$t> for ModInt<P> { fn add_assign(&mut self, rhs
    : $t) { *self += Self::from(rhs) } } impl<const P: u32> SubAssign<$t> for ModInt<P> { fn sub_assign(&mut self, rhs: $t) { *self -= Self::from(rhs) 
    } } impl<const P: u32> MulAssign<$t> for ModInt<P> { fn mul_assign(&mut self, rhs: $t) { *self *= Self::from(rhs) } } impl<const P: u32> DivAssign
    <$t> for ModInt<P> { fn div_assign(&mut self, rhs: $t) { *self /= Self::from(rhs) } } )* };}impl_op_for_modint!(usize, isize, u64, i64, u32, i32
    );}
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