結果
| 問題 | No.1299 Random Array Score |
| ユーザー |
 Moss_Local
|
| 提出日時 | 2020-11-27 22:56:20 |
| 言語 | Rust (1.77.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 11,301 bytes |
| コンパイル時間 | 1,274 ms |
| コンパイル使用メモリ | 157,680 KB |
| 実行使用メモリ | 6,408 KB |
| 最終ジャッジ日時 | 2023-10-09 20:55:32 |
| 合計ジャッジ時間 | 3,197 ms |
|
ジャッジサーバーID （参考情報） |
judge11 / judge12 |
（要ログイン）
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 | 1 ms
4,376 KB |
| testcase_01 | AC | 1 ms
4,380 KB |
| testcase_02 | WA | - |
| testcase_03 | WA | - |
| testcase_04 | WA | - |
| testcase_05 | WA | - |
| testcase_06 | WA | - |
| testcase_07 | WA | - |
| testcase_08 | WA | - |
| testcase_09 | WA | - |
| testcase_10 | WA | - |
| testcase_11 | WA | - |
| testcase_12 | WA | - |
| testcase_13 | WA | - |
| testcase_14 | WA | - |
| testcase_15 | WA | - |
| testcase_16 | WA | - |
| testcase_17 | WA | - |
| testcase_18 | WA | - |
| testcase_19 | WA | - |
| testcase_20 | WA | - |
| testcase_21 | WA | - |
| testcase_22 | WA | - |
| testcase_23 | WA | - |
| testcase_24 | WA | - |
| testcase_25 | WA | - |
| testcase_26 | WA | - |
| testcase_27 | WA | - |
| testcase_28 | WA | - |
| testcase_29 | WA | - |
| testcase_30 | WA | - |
| testcase_31 | WA | - |
| testcase_32 | WA | - |
| testcase_33 | WA | - |
| testcase_34 | AC | 5 ms
4,392 KB |
| testcase_35 | AC | 13 ms
6,272 KB |
| testcase_36 | AC | 6 ms
4,440 KB |
コンパイルメッセージ
warning: unnecessary parentheses around type
--> Main.rs:39:15
|
39 | fn readi() -> (i64) {
| ^ ^
|
= note: `#[warn(unused_parens)]` on by default
help: remove these parentheses
|
39 - fn readi() -> (i64) {
39 + fn readi() -> i64 {
|
warning: unused macro definition: `notnan`
--> Main.rs:111:14
|
111 | macro_rules! notnan(($lit:literal $(,)?) => (NotNan::new($lit).unwrap()));
| ^^^^^^
|
= note: `#[warn(unused_macros)]` on by default
warning: unused macro definition: `mint`
--> Main.rs:137:14
|
137 | macro_rules! mint {
| ^^^^
warning: unnecessary parentheses around assigned value
--> Main.rs:230:19
|
230 | self.0 *= (rhs.0 % MOD);
| ^ ^
|
help: remove these parentheses
|
230 - self.0 *= (rhs.0 % MOD);
230 + self.0 *= rhs.0 % MOD;
|
warning: unnecessary parentheses around assigned value
--> Main.rs:439:11
|
439 | kk /= (Mint(2) * (mn + Mint(-1)).pow(3));
| ^ ^
|
help: remove these parentheses
|
439 - kk /= (Mint(2) * (mn + Mint(-1)).pow(3));
439 + kk /= Mint(2) * (mn + Mint(-1)).pow(3);
|
warning: unused variable: `a2`
--> Main.rs:399:14
|
399 | let (a2, e2) = mod_fact(k, p, fact);
| ^^ help: if this is intentional, prefix it with an underscore: `_a2`
|
= note: `#[warn(unused_variables)]` on by default
warning: unused variable: `a3`
--> Main.rs:400:14
|
400 | let (a3, e3) = mod_fact(n - k, p, fact);
| ^^ help: if this is intentional, prefix it with an underscore: `_a3`
warning: variable does not need to be mutable
--> Main.rs:421:9
|
421 | let mut s = Mint(s as i64);
| ----^
| |
| help: remove this `mut`
|
= note: `#[warn(unused_mut)]` on by default
warning: 8 warnings emitted
ソースコード
// -*- coding:utf-8-unix -*-
#![allow(dead_code)]
#![allow(unused_imports)]
use std::cmp::Ordering::*;
use std::cmp;
use std::cmp::Ordering;
use std::collections::*;
use std::convert::*;
use std::convert::{From, Into};
use std::fmt::Debug;
use std::fs::File;
use std::io::prelude::*;
use std::io::*;
use std::marker::Copy;
use std::mem::*;
use std::ops::{Add, Mul, Neg, Sub};
use std::str;
use std::vec;
const INF: i64 = 1223372036854775807;
const MEM_SIZE: usize = 202020;
// const MOD: i64 = 1000000007;
const MOD: i64 = 998244353;
use std::cmp::*;
use std::collections::*;
use std::io::stdin;
use std::io::stdout;
use std::io::Write;
#[allow(dead_code)]
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()
}
#[allow(dead_code)]
fn readi() -> (i64) {
let mut str = String::new();
let _ = stdin().read_line(&mut str).unwrap();
let mut iter = str.split_whitespace();
iter.next().unwrap().parse::<i64>().unwrap()
}
#[allow(dead_code)]
fn read_vec<T: std::str::FromStr>() -> Vec<T> {
read::<String>()
.split_whitespace()
.map(|e| e.parse().ok().unwrap())
.collect()
}
#[allow(dead_code)]
fn read_vec2<T: std::str::FromStr>(n: u32) -> Vec<Vec<T>> {
(0..n).map(|_| read_vec()).collect()
}
#[allow(dead_code)]
fn readii() -> (i64, i64) {
let mut str = String::new();
let _ = stdin().read_line(&mut str).unwrap();
let mut iter = str.split_whitespace();
(
iter.next().unwrap().parse::<i64>().unwrap(),
iter.next().unwrap().parse::<i64>().unwrap(),
)
}
fn readff() -> (f64, f64) {
let mut str = String::new();
let _ = stdin().read_line(&mut str).unwrap();
let mut iter = str.split_whitespace();
(
iter.next().unwrap().parse::<f64>().unwrap(),
iter.next().unwrap().parse::<f64>().unwrap(),
)
}
#[allow(dead_code)]
fn readiii() -> (i64, i64, i64) {
let mut str = String::new();
let _ = stdin().read_line(&mut str).unwrap();
let mut iter = str.split_whitespace();
(
iter.next().unwrap().parse::<i64>().unwrap(),
iter.next().unwrap().parse::<i64>().unwrap(),
iter.next().unwrap().parse::<i64>().unwrap(),
)
}
#[allow(dead_code)]
fn readuu() -> (usize, usize) {
let mut str = String::new();
let _ = stdin().read_line(&mut str).unwrap();
let mut iter = str.split_whitespace();
(
iter.next().unwrap().parse::<usize>().unwrap(),
iter.next().unwrap().parse::<usize>().unwrap(),
)
}
fn readcc() -> (char, char) {
let mut str = String::new();
let _ = stdin().read_line(&mut str).unwrap();
let mut iter = str.split_whitespace();
(
iter.next().unwrap().parse::<char>().unwrap(),
iter.next().unwrap().parse::<char>().unwrap(),
)
}
macro_rules! notnan(($lit:literal $(,)?) => (NotNan::new($lit).unwrap()));
#[allow(dead_code)]
fn readuuu() -> (usize, usize, usize) {
let mut str = String::new();
let _ = stdin().read_line(&mut str).unwrap();
let mut iter = str.split_whitespace();
(
iter.next().unwrap().parse::<usize>().unwrap(),
iter.next().unwrap().parse::<usize>().unwrap(),
iter.next().unwrap().parse::<usize>().unwrap(),
)
}
#[allow(dead_code)]
fn readuuuu() -> (usize, usize, usize, usize) {
let mut str = String::new();
let _ = stdin().read_line(&mut str).unwrap();
let mut iter = str.split_whitespace();
(
iter.next().unwrap().parse::<usize>().unwrap(),
iter.next().unwrap().parse::<usize>().unwrap(),
iter.next().unwrap().parse::<usize>().unwrap(),
iter.next().unwrap().parse::<usize>().unwrap(),
)
}
macro_rules! mint {
(a :expr ) => {
Mint::new({ a })
};
}
#[derive(Copy, Clone)]
pub struct Mint(i64);
impl Mint {
fn new(x: i64) -> Self {
Mint(x.rem_euclid(MOD))
}
fn pow(self, n: usize) -> Self {
match n {
0 => Mint::new(1),
_ => {
let mut a = self.pow(n >> 1);
a *= a;
if n & 1 == 1 {
a *= self;
}
a
}
}
}
fn inv(self) -> Self {
self.pow((MOD - 2) as usize)
}
}
impl std::ops::Neg for Mint {
type Output = Mint;
fn neg(self) -> Self::Output {
Self::new(-self.0)
}
}
impl std::ops::AddAssign<Mint> for Mint {
fn add_assign(&mut self, rhs: Self) {
self.0 += rhs.0;
self.0 %= MOD;
}
}
impl std::ops::AddAssign<i64> for Mint {
fn add_assign(&mut self, rhs: i64) {
*self += Mint::new(rhs);
}
}
impl std::ops::AddAssign<usize> for Mint {
fn add_assign(&mut self, rhs: usize) {
*self += Mint::new(rhs as i64);
}
}
impl<T> std::ops::Add<T> for Mint
where
Mint: std::ops::AddAssign<T>,
{
type Output = Self;
fn add(self, other: T) -> Self {
let mut res = self;
res += other;
res
}
}
impl std::ops::SubAssign<Mint> for Mint {
fn sub_assign(&mut self, rhs: Self) {
self.0 -= rhs.0;
if self.0 < 0 {
self.0 += MOD;
}
}
}
impl std::ops::SubAssign<i64> for Mint {
fn sub_assign(&mut self, rhs: i64) {
*self -= Mint::new(rhs);
}
}
impl std::ops::SubAssign<usize> for Mint {
fn sub_assign(&mut self, rhs: usize) {
*self -= Mint::new(rhs as i64);
}
}
impl<T> std::ops::Sub<T> for Mint
where
Mint: std::ops::SubAssign<T>,
{
type Output = Self;
fn sub(self, other: T) -> Self {
let mut res = self;
res -= other;
res
}
}
impl std::ops::MulAssign<Mint> for Mint {
fn mul_assign(&mut self, rhs: Self) {
self.0 %= MOD;
self.0 *= (rhs.0 % MOD);
self.0 %= MOD;
}
}
impl std::ops::MulAssign<i64> for Mint {
fn mul_assign(&mut self, rhs: i64) {
*self *= Mint::new(rhs);
}
}
impl std::ops::MulAssign<usize> for Mint {
fn mul_assign(&mut self, rhs: usize) {
*self *= Mint::new(rhs as i64);
}
}
impl<T> std::ops::Mul<T> for Mint
where
Mint: std::ops::MulAssign<T>,
{
type Output = Self;
fn mul(self, other: T) -> Self {
let mut res = self;
res *= other;
res
}
}
impl std::ops::DivAssign<Mint> for Mint {
fn div_assign(&mut self, rhs: Self) {
*self *= rhs.inv();
}
}
impl std::ops::DivAssign<i64> for Mint {
fn div_assign(&mut self, rhs: i64) {
*self /= Mint::new(rhs);
}
}
impl std::ops::DivAssign<usize> for Mint {
fn div_assign(&mut self, rhs: usize) {
*self /= Mint::new(rhs as i64);
}
}
impl<T> std::ops::Div<T> for Mint
where
Mint: std::ops::DivAssign<T>,
{
type Output = Self;
fn div(self, other: T) -> Self {
let mut res = self;
res /= other;
res
}
}
impl std::fmt::Display for Mint {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{}", self.0)
}
}
impl std::ops::Deref for Mint {
type Target = i64;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl std::ops::DerefMut for Mint {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.0
}
}
#[allow(dead_code)]
pub fn gcd(a: usize, b: usize) -> usize {
if b == 0 {
a
} else {
gcd(b, a % b)
}
}
#[allow(dead_code)]
pub fn lcm(a: usize, b: usize) -> usize {
a / gcd(a, b) * b
}
#[allow(dead_code)]
/// (gcd, x, y)
pub fn extgcd(a: i64, b: i64) -> (i64, i64, i64) {
if b == 0 {
(a, 1, 0)
} else {
let (gcd, x, y) = extgcd(b, a % b);
(gcd, y, x - (a / b) * y)
}
}
#[allow(dead_code)]
/// x ^ n % m
pub fn mod_pow(x: usize, n: usize, m: usize) -> usize {
let mut res = 1;
let mut x = x % m;
let mut n = n;
while n > 0 {
if n & 1 == 1 {
res = (res * x) % m;
}
x = (x * x) % m;
n >>= 1;
}
res
}
#[allow(dead_code)]
pub fn mod_inverse(a: usize, m: usize) -> usize {
let (_, x, _) = extgcd(a as i64, m as i64);
((m as i64 + x) as usize % m) % m
}
#[allow(dead_code)]
pub fn fact_table(len: usize, m: usize) -> Vec<usize> {
let mut res = vec![1; len + 1];
for i in 1..len + 1 {
res[i] = (i as usize * res[i - 1]) % m;
}
res
}
#[allow(dead_code)]
/// Factorial and Inverse factorial table
pub fn fact_inv_table(size: usize, m: usize) -> (Vec<usize>, Vec<usize>) {
let mut fact = vec![1; size];
let mut fact_inv = vec![1; size];
for i in 2..size {
fact[i] = fact[i - 1] * i as usize % m;
fact_inv[i] = m - ((m / i as usize) * fact_inv[(m % i as usize) as usize] % m);
}
for i in 1..size {
fact_inv[i] = fact_inv[i - 1] * fact_inv[i] % m;
}
(fact, fact_inv)
}
#[allow(dead_code)]
/// (a mod p, e when n! = a p\^e)
pub fn mod_fact(n: usize, p: usize, fact: &[usize]) -> (usize, usize) {
if n == 0 {
(1, 0)
} else {
let (a, b) = mod_fact(n / p, p, fact);
let pow = b + n / p;
if n / p % 2 != 0 {
(a * (p - fact[(n % p) as usize]) % p, pow)
} else {
(a * fact[(n % p) as usize] % p, pow)
}
}
}
#[allow(dead_code)]
/// C(n, k) % p
pub fn mod_comb(n: usize, k: usize, p: usize, fact: &[usize]) -> usize {
if n < k {
0
} else {
let (a1, e1) = mod_fact(n, p, fact);
let (a2, e2) = mod_fact(k, p, fact);
let (a3, e3) = mod_fact(n - k, p, fact);
if e1 > e2 + e3 {
0
} else {
a1 * mod_inverse(a2 * a3 % p, p) % p
}
}
}
pub fn mod_perm(n: usize, k: usize, p: usize, fact: &[usize]) -> usize {
if n < k {
0
} else {
let (a1, e1) = mod_fact(n, p, fact);
let (a2, e2) = mod_fact(k, p, fact);
let (a3, e3) = mod_fact(n - k, p, fact);
if e1 > e2 + e3 {
0
} else {
a1 % p
}
}
}
#[allow(dead_code)]
/// H(n, k) % p
pub fn mod_comb_repetition(n: usize, k: usize, p: usize, fact: &[usize]) -> usize {
mod_comb(n - 1 + k, n - 1, p, fact)
}
fn solve() {
let (n, k) = readuu();
let vec: Vec<usize> = read_vec();
let mut s = 0;
for i in 0..n {
s += vec[i];
}
let mut s = Mint(s as i64);
let mut res = Mint(0);
let mk = Mint(k as i64);
// let kk = (mk * (mk + Mint(1)) * (Mint(2) * mk + Mint(1)) + Mint(3) * mk * (mk + Mint(1))) / Mint(12);
let mn = Mint(n as i64);
// let mut kk = mk * mn.pow(k + 1) - mk * mn.pow(k) - mn.pow(k) + Mint(1);
// kk /= (mn - Mint(1)).pow(2);
// println!("{:?}", kk.0);
// let kk = Mint(1) + mn.pow(k - 1);
// let kk = mk * (mk + Mint(1)) / Mint(2) * mn.pow(k - 1);
let mut kk = mk.pow(2) * mn.pow(k + 1) * (mn + Mint(-2))
+ mk.pow(2) * mn.pow(k)
+ Mint(-4) * mk.pow(1) * mn.pow(k + 1)
+ mk.pow(1) * mn.pow(k + 2)
+ Mint(3) * mk.pow(1) * mn.pow(k)
+ Mint(2) * mk.pow(0) * mn.pow(k)
+ Mint(-2);
kk /= (Mint(2) * (mn + Mint(-1)).pow(3));
res += Mint(n as i64) * kk * s;
// res *= Mint(n as i64);
res /= Mint(n as i64).pow(k);
res += s;
println!("{:?}", res.0);
}
fn main() {
solve()
}