結果
| 問題 | No.2369 Some Products |
| ユーザー |
 akakimidori
|
| 提出日時 | 2023-06-30 22:07:58 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
AC
|
| 実行時間 | 59 ms / 2,500 ms |
| コード長 | 9,647 bytes |
| コンパイル時間 | 18,519 ms |
| コンパイル使用メモリ | 399,012 KB |
| 実行使用メモリ | 26,880 KB |
| 最終ジャッジ日時 | 2024-07-07 09:55:38 |
| 合計ジャッジ時間 | 17,172 ms |
|
ジャッジサーバーID （参考情報） |
judge5 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 |
| other | AC * 14 |
コンパイルメッセージ
warning: unused import: `std::io::Write` --> src/main.rs:1:5 | 1 | use std::io::Write; | ^^^^^^^^^^^^^^ | = note: `#[warn(unused_imports)]` on by default warning: type alias `Map` is never used --> src/main.rs:4:6 | 4 | type Map<K, V> = BTreeMap<K, V>; | ^^^ | = note: `#[warn(dead_code)]` on by default warning: type alias `Set` is never used --> src/main.rs:5:6 | 5 | type Set<T> = BTreeSet<T>; | ^^^ warning: type alias `Deque` is never used --> src/main.rs:6:6 | 6 | type Deque<T> = VecDeque<T>; | ^^^^^
ソースコード
use std::io::Write;use std::collections::*;type Map<K, V> = BTreeMap<K, V>;type Set<T> = BTreeSet<T>;type Deque<T> = VecDeque<T>;fn main() {input! {n: usize,p: [i64; n],q: usize,ask: [(usize1, usize, usize); q],}let p = p.into_iter().map(|p| M::from(p)).collect::<Vec<_>>();let mut ans = vec![M::zero(); q];let mut dfs = vec![(0, n, (0..q).collect::<Vec<_>>())];while let Some((l, r, x)) = dfs.pop() {if x.is_empty() {continue;}if r - l == 1 {for x in x {ans[x] = p[l];}continue;}let m = (l + r) / 2;let mut left = vec![];let mut right = vec![];let mut mid = vec![];for x in x {let (s, t, _) = ask[x];if t <= m {left.push(x);} else if m <= s {right.push(x);} else {mid.push(x);}}dfs.push((l, m, left));dfs.push((m, r, right));let mut dp = vec![vec![M::one()]];for &p in p[m..r].iter() {let last = dp.last().unwrap();let mut next = vec![M::zero(); last.len() + 1];for (i, dp) in last.iter().enumerate() {next[i] += *dp;next[i + 1] += *dp * p;}dp.push(next);}let right = dp;let mut dp = vec![vec![M::one()]];for &p in p[l..m].iter().rev() {let last = dp.last().unwrap();let mut next = vec![M::zero(); last.len() + 1];for (i, dp) in last.iter().enumerate() {next[i] += *dp;next[i + 1] += *dp * p;}dp.push(next);}let left = dp;for x in mid {let (l, r, k) = ask[x];let (left, right) = (&left[m - l], &right[r - m]);let ans = &mut ans[x];for (i, v) in right.iter().enumerate() {if let Some(u) = left.get(k - i) {*ans += *v * *u;}}}}for a in ans {println!("{}", a);}}// ---------- begin input macro ----------// reference: https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8#[macro_export]macro_rules! input {(source = $s:expr, $($r:tt)*) => {let mut iter = $s.split_whitespace();input_inner!{iter, $($r)*}};($($r:tt)*) => {let s = {use std::io::Read;let mut s = String::new();std::io::stdin().read_to_string(&mut s).unwrap();s};let mut iter = s.split_whitespace();input_inner!{iter, $($r)*}};}#[macro_export]macro_rules! input_inner {($iter:expr) => {};($iter:expr, ) => {};($iter:expr, $var:ident : $t:tt $($r:tt)*) => {let $var = read_value!($iter, $t);input_inner!{$iter $($r)*}};}#[macro_export]macro_rules! read_value {($iter:expr, ( $($t:tt),* )) => {( $(read_value!($iter, $t)),* )};($iter:expr, [ $t:tt ; $len:expr ]) => {(0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>()};($iter:expr, chars) => {read_value!($iter, String).chars().collect::<Vec<char>>()};($iter:expr, bytes) => {read_value!($iter, String).bytes().collect::<Vec<u8>>()};($iter:expr, usize1) => {read_value!($iter, usize) - 1};($iter:expr, $t:ty) => {$iter.next().unwrap().parse::<$t>().expect("Parse error")};}// ---------- end input macro ----------// ---------- begin modint ----------use std::marker::*;use std::ops::*;pub trait Modulo {fn modulo() -> u32;}pub struct ConstantModulo<const M: u32>;impl<const M: u32> Modulo for ConstantModulo<{ M }> {fn modulo() -> u32 {M}}pub struct ModInt<T>(u32, PhantomData<T>);impl<T> Clone for ModInt<T> {fn clone(&self) -> Self {Self::new_unchecked(self.0)}}impl<T> Copy for ModInt<T> {}impl<T: Modulo> Add for ModInt<T> {type Output = ModInt<T>;fn add(self, rhs: Self) -> Self::Output {let mut v = self.0 + rhs.0;if v >= T::modulo() {v -= T::modulo();}Self::new_unchecked(v)}}impl<T: Modulo> AddAssign for ModInt<T> {fn add_assign(&mut self, rhs: Self) {*self = *self + rhs;}}impl<T: Modulo> Sub for ModInt<T> {type Output = ModInt<T>;fn sub(self, rhs: Self) -> Self::Output {let mut v = self.0 - rhs.0;if self.0 < rhs.0 {v += T::modulo();}Self::new_unchecked(v)}}impl<T: Modulo> SubAssign for ModInt<T> {fn sub_assign(&mut self, rhs: Self) {*self = *self - rhs;}}impl<T: Modulo> Mul for ModInt<T> {type Output = ModInt<T>;fn mul(self, rhs: Self) -> Self::Output {let v = self.0 as u64 * rhs.0 as u64 % T::modulo() as u64;Self::new_unchecked(v as u32)}}impl<T: Modulo> MulAssign for ModInt<T> {fn mul_assign(&mut self, rhs: Self) {*self = *self * rhs;}}impl<T: Modulo> Neg for ModInt<T> {type Output = ModInt<T>;fn neg(self) -> Self::Output {if self.is_zero() {Self::zero()} else {Self::new_unchecked(T::modulo() - self.0)}}}impl<T> std::fmt::Display for ModInt<T> {fn fmt<'a>(&self, f: &mut std::fmt::Formatter<'a>) -> std::fmt::Result {write!(f, "{}", self.0)}}impl<T> std::fmt::Debug for ModInt<T> {fn fmt<'a>(&self, f: &mut std::fmt::Formatter<'a>) -> std::fmt::Result {write!(f, "{}", self.0)}}impl<T> Default for ModInt<T> {fn default() -> Self {Self::zero()}}impl<T: Modulo> std::str::FromStr for ModInt<T> {type Err = std::num::ParseIntError;fn from_str(s: &str) -> Result<Self, Self::Err> {let val = s.parse::<u32>()?;Ok(ModInt::new(val))}}impl<T: Modulo> From<usize> for ModInt<T> {fn from(val: usize) -> ModInt<T> {ModInt::new_unchecked((val % T::modulo() as usize) as u32)}}impl<T: Modulo> From<u64> for ModInt<T> {fn from(val: u64) -> ModInt<T> {ModInt::new_unchecked((val % T::modulo() as u64) as u32)}}impl<T: Modulo> From<i64> for ModInt<T> {fn from(val: i64) -> ModInt<T> {let mut v = ((val % T::modulo() as i64) + T::modulo() as i64) as u32;if v >= T::modulo() {v -= T::modulo();}ModInt::new_unchecked(v)}}impl<T> ModInt<T> {pub fn new_unchecked(n: u32) -> Self {ModInt(n, PhantomData)}pub fn zero() -> Self {ModInt::new_unchecked(0)}pub fn one() -> Self {ModInt::new_unchecked(1)}pub fn is_zero(&self) -> bool {self.0 == 0}}impl<T: Modulo> ModInt<T> {pub fn new(d: u32) -> Self {ModInt::new_unchecked(d % T::modulo())}pub fn pow(&self, mut n: u64) -> Self {let mut t = Self::one();let mut s = *self;while n > 0 {if n & 1 == 1 {t *= s;}s *= s;n >>= 1;}t}pub fn inv(&self) -> Self {assert!(!self.is_zero());self.pow(T::modulo() as u64 - 2)}pub fn fact(n: usize) -> Self {(1..=n).fold(Self::one(), |s, a| s * Self::from(a))}pub fn perm(n: usize, k: usize) -> Self {if k > n {return Self::zero();}((n - k + 1)..=n).fold(Self::one(), |s, a| s * Self::from(a))}pub fn binom(n: usize, k: usize) -> Self {if k > n {return Self::zero();}let k = k.min(n - k);let mut nu = Self::one();let mut de = Self::one();for i in 0..k {nu *= Self::from(n - i);de *= Self::from(i + 1);}nu * de.inv()}}// ---------- end modint ----------// ---------- begin precalc ----------pub struct Precalc<T> {fact: Vec<ModInt<T>>,ifact: Vec<ModInt<T>>,inv: Vec<ModInt<T>>,}impl<T: Modulo> Precalc<T> {pub fn new(n: usize) -> Precalc<T> {let mut inv = vec![ModInt::one(); n + 1];let mut fact = vec![ModInt::one(); n + 1];let mut ifact = vec![ModInt::one(); n + 1];for i in 2..=n {fact[i] = fact[i - 1] * ModInt::new_unchecked(i as u32);}ifact[n] = fact[n].inv();if n > 0 {inv[n] = ifact[n] * fact[n - 1];}for i in (1..n).rev() {ifact[i] = ifact[i + 1] * ModInt::new_unchecked((i + 1) as u32);inv[i] = ifact[i] * fact[i - 1];}Precalc { fact, ifact, inv }}pub fn inv(&self, n: usize) -> ModInt<T> {assert!(n > 0);self.inv[n]}pub fn fact(&self, n: usize) -> ModInt<T> {self.fact[n]}pub fn ifact(&self, n: usize) -> ModInt<T> {self.ifact[n]}pub fn perm(&self, n: usize, k: usize) -> ModInt<T> {if k > n {return ModInt::zero();}self.fact[n] * self.ifact[n - k]}pub fn binom(&self, n: usize, k: usize) -> ModInt<T> {if k > n {return ModInt::zero();}self.fact[n] * self.ifact[k] * self.ifact[n - k]}}// ---------- end precalc ----------type M = ModInt<ConstantModulo<998_244_353>>;