結果
| 問題 |
No.1287 えぬけー
|
| コンテスト | |
| ユーザー |
cotton_fn_
|
| 提出日時 | 2020-11-14 01:45:57 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 6,358 bytes |
| コンパイル時間 | 13,229 ms |
| コンパイル使用メモリ | 378,916 KB |
| 実行使用メモリ | 5,376 KB |
| 最終ジャッジ日時 | 2024-07-22 22:35:13 |
| 合計ジャッジ時間 | 14,539 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 WA * 2 |
| other | AC * 1 WA * 4 |
ソースコード
#![allow(unused_imports, unused_macros)]
use kyoproio::*;
use std::{
collections::*,
io::{self, prelude::*},
iter,
mem::{replace, swap},
};
fn run<I: Input, O: Write>(mut kin: I, mut out: O) {
macro_rules! output { ($($args:expr),+) => { write!(&mut out, $($args),+).unwrap(); }; }
macro_rules! outputln {
($($args:expr),+) => { output!($($args),+); outputln!(); };
() => { output!("\n"); if cfg!(debug_assertions) { out.flush().unwrap(); } }
}
const P: u64 = 1000000007;
let t: usize = kin.input();
for (x, k) in kin.iter::<(u64, u64)>().take(t) {
let ans = if k == 1 {
x
} else {
let a = (k - 1) * pow(P - 1, k - 2, k) % k;
pow(x, (a * (P - 1) + 1) / k, P)
};
outputln!("{}", ans);
}
}
pub fn pow(x: u64, mut n: u64, m: u64) -> u64 {
let mut x = x % m;
let mut y = 1;
while n > 0 {
if n % 2 == 1 {
y = y * x % m;
}
x = x * x % m;
n /= 2;
}
y
}
// -----------------------------------------------------------------------------
fn main() -> io::Result<()> {
std::thread::Builder::new()
.stack_size(64 * 1024 * 1024)
.spawn(|| {
run(
KInput::new(io::stdin().lock()),
io::BufWriter::new(io::stdout().lock()),
)
})?
.join()
.unwrap();
Ok(())
}
// -----------------------------------------------------------------------------
pub mod kyoproio {
use std::{io::prelude::*, mem};
pub trait Input {
fn bytes(&mut self) -> &[u8];
fn str(&mut self) -> &str {
std::str::from_utf8(self.bytes()).unwrap()
}
fn input<T: InputParse>(&mut self) -> T {
T::input(self)
}
fn iter<T: InputParse>(&mut self) -> Iter<T, Self> {
Iter(self, std::marker::PhantomData)
}
fn seq<T: InputParse, B: std::iter::FromIterator<T>>(&mut self, n: usize) -> B {
self.iter().take(n).collect()
}
}
pub struct KInput<R> {
src: R,
buf: Vec<u8>,
pos: usize,
len: usize,
}
impl<R: Read> KInput<R> {
pub fn new(src: R) -> Self {
Self {
src,
buf: vec![0; 1 << 16],
pos: 0,
len: 0,
}
}
}
impl<R: Read> Input for KInput<R> {
fn bytes(&mut self) -> &[u8] {
loop {
while let Some(delim) = self.buf[self.pos..self.len]
.iter()
.position(|b| b.is_ascii_whitespace())
{
let p = self.pos;
self.pos += delim + 1;
if delim > 0 {
return &self.buf[p..p + delim];
}
}
if self.pos > 0 {
self.buf.copy_within(self.pos..self.len, 0);
self.len -= self.pos;
self.pos = 0;
}
if self.len >= self.buf.len() {
self.buf.resize(2 * self.buf.len(), 0);
}
let read = self.src.read(&mut self.buf[self.len..]).unwrap();
if read == 0 {
return &self.buf[mem::replace(&mut self.pos, self.len)..self.len];
}
self.len += read;
}
}
}
pub struct Iter<'a, T, I: ?Sized>(&'a mut I, std::marker::PhantomData<*const T>);
impl<'a, T: InputParse, I: Input + ?Sized> Iterator for Iter<'a, T, I> {
type Item = T;
fn next(&mut self) -> Option<T> {
Some(self.0.input())
}
fn size_hint(&self) -> (usize, Option<usize>) {
(!0, None)
}
}
pub trait InputParse: Sized {
fn input<I: Input + ?Sized>(src: &mut I) -> Self;
}
impl InputParse for Vec<u8> {
fn input<I: Input + ?Sized>(src: &mut I) -> Self {
src.bytes().to_owned()
}
}
macro_rules! from_str_impl {
{ $($T:ty)* } => {
$(impl InputParse for $T {
fn input<I: Input + ?Sized>(src: &mut I) -> Self {
src.str().parse::<$T>().unwrap()
}
})*
}
}
from_str_impl! { String char bool f32 f64 }
macro_rules! parse_int_impl {
{ $($I:ty: $U:ty)* } => {
$(impl InputParse for $I {
fn input<I: Input + ?Sized>(src: &mut I) -> Self {
let f = |s: &[u8]| s.iter().fold(0, |x, b| 10 * x + (b & 0xf) as $I);
let s = src.bytes();
if let Some((&b'-', t)) = s.split_first() { -f(t) } else { f(s) }
}
}
impl InputParse for $U {
fn input<I: Input + ?Sized>(src: &mut I) -> Self {
src.bytes().iter().fold(0, |x, b| 10 * x + (b & 0xf) as $U)
}
})*
};
}
parse_int_impl! { isize:usize i8:u8 i16:u16 i32:u32 i64:u64 i128:u128 }
macro_rules! tuple_impl {
($H:ident $($T:ident)*) => {
impl<$H: InputParse, $($T: InputParse),*> InputParse for ($H, $($T),*) {
fn input<I: Input + ?Sized>(src: &mut I) -> Self {
($H::input(src), $($T::input(src)),*)
}
}
tuple_impl!($($T)*);
};
() => {}
}
tuple_impl!(A B C D E F G);
macro_rules! array_impl {
{ $($N:literal)* } => {
$(impl<T: InputParse> InputParse for [T; $N] {
fn input<I: Input + ?Sized>(src: &mut I) -> Self {
let mut arr = mem::MaybeUninit::uninit();
unsafe {
let ptr = arr.as_mut_ptr() as *mut T;
for i in 0..$N {
ptr.add(i).write(src.input());
}
arr.assume_init()
}
}
})*
};
}
array_impl! { 1 2 3 4 5 6 7 8 }
#[macro_export]
macro_rules! kdbg {
($($v:expr),*) => {
if cfg!(debug_assertions) { dbg!($($v),*) } else { ($($v),*) }
}
}
}
cotton_fn_