結果
| 問題 |
No.849 yuki国の分割統治
|
| コンテスト | |
| ユーザー |
cotton_fn_
|
| 提出日時 | 2020-12-14 18:02:35 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
AC
|
| 実行時間 | 19 ms / 2,000 ms |
| コード長 | 6,759 bytes |
| コンパイル時間 | 16,578 ms |
| コンパイル使用メモリ | 377,024 KB |
| 実行使用メモリ | 5,652 KB |
| 最終ジャッジ日時 | 2024-09-20 00:49:29 |
| 合計ジャッジ時間 | 15,839 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 26 |
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) {
let (a, b, c, d): (i64, i64, i64, i64) = kin.input();
let n: usize = kin.input();
let det = a * d - b * c;
let mut set = HashSet::new();
if det == 0 {
let ss = a == 0;
let a = gcd(a, c);
let b = gcd(b, d);
for p in kin.iter::<(i64, i64)>().take(n) {
let (x, y) = p;
if ss {
set.insert((x - y * a / b, y.rem_euclid(b)));
} else {
set.insert((x.rem_euclid(a), y - x * b / a));
}
}
} else {
let f = |(x, y)| {
// (a * (d * x - c * y) / det, d * (-b * x + a * y) / det)
(d * x - c * y, -b * x + a * y)
};
for p in kin.iter::<(i64, i64)>().take(n) {
let (x, y) = f(p);
set.insert((x.rem_euclid(det), y.rem_euclid(det)));
}
}
outln!(out, "{}", set.len());
}
fn gcd(x: i64, y: i64) -> i64 {
if y == 0 { x } else { gcd(y, x % 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(())
}
#[macro_export]
macro_rules! out {
($($arg:tt)*) => { write!($($arg)*).unwrap(); }
}
#[macro_export]
macro_rules! outln {
($dst:expr $(, $($arg:tt)*)?) => {{
writeln!($dst $(, $($arg)*)?).unwrap();
if cfg!(debug_assertions) { $dst.flush().unwrap(); }
}}
}
#[macro_export]
macro_rules! eout {
($($arg:tt)*) => { if cfg!(debug_assertions) { eprintln!($($arg)*); } }
}
#[macro_export]
macro_rules! kdbg {
($($v:expr),*) => { if cfg!(debug_assertions) { dbg!($($v),*) } else { ($($v),*) } }
}
pub mod kyoproio {
use std::{
io::prelude::*,
iter::FromIterator,
marker::PhantomData,
mem::{self, MaybeUninit},
str,
};
pub trait Input {
fn bytes(&mut self) -> &[u8];
fn str(&mut self) -> &str {
str::from_utf8(self.bytes()).unwrap()
}
fn input<T: InputItem>(&mut self) -> T {
T::input(self)
}
fn iter<T: InputItem>(&mut self) -> Iter<T, Self> {
Iter(self, PhantomData)
}
fn seq<T: InputItem, B: FromIterator<T>>(&mut self, n: usize) -> B {
self.iter().take(n).collect()
}
}
pub struct KInput<R> {
src: R,
buf: Vec<u8>,
pos: usize,
len: usize,
}
impl<R: Read> KInput<R> {
pub fn new(src: R) -> Self {
Self {
src,
buf: vec![0; 1 << 16],
pos: 0,
len: 0,
}
}
fn read(&mut self) -> usize {
if self.pos > 0 {
self.buf.copy_within(self.pos..self.len, 0);
self.len -= self.pos;
self.pos = 0;
} else if self.len >= self.buf.len() {
self.buf.resize(2 * self.buf.len(), 0);
}
let n = self.src.read(&mut self.buf[self.len..]).unwrap();
self.len += n;
n
}
}
impl<R: Read> Input for KInput<R> {
fn bytes(&mut self) -> &[u8] {
loop {
while let Some(d) = self.buf[self.pos..self.len]
.iter()
.position(u8::is_ascii_whitespace)
{
let p = self.pos;
self.pos += d + 1;
if d > 0 {
return &self.buf[p..p + d];
}
}
if self.read() == 0 {
return &self.buf[mem::replace(&mut self.pos, self.len)..self.len];
}
}
}
}
pub struct Iter<'a, T, I: ?Sized>(&'a mut I, PhantomData<*const T>);
impl<'a, T: InputItem, I: Input + ?Sized> Iterator for Iter<'a, T, I> {
type Item = T;
fn next(&mut self) -> Option<T> {
Some(self.0.input())
}
fn size_hint(&self) -> (usize, Option<usize>) {
(!0, None)
}
}
pub trait InputItem: Sized {
fn input<I: Input + ?Sized>(src: &mut I) -> Self;
}
impl InputItem for Vec<u8> {
fn input<I: Input + ?Sized>(src: &mut I) -> Self {
src.bytes().to_owned()
}
}
macro_rules! from_str {
($($T:ty)*) => {
$(impl InputItem for $T {
fn input<I: Input + ?Sized>(src: &mut I) -> Self {
src.str().parse::<$T>().unwrap()
}
})*
}
}
from_str!(String char bool f32 f64);
macro_rules! parse_int {
($($I:ty: $U:ty)*) => {
$(impl InputItem 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 InputItem for $U {
fn input<I: Input + ?Sized>(src: &mut I) -> Self {
src.bytes().iter().fold(0, |x, b| 10 * x + (b & 0xf) as $U)
}
})*
}
}
parse_int!(isize:usize i8:u8 i16:u16 i32:u32 i64:u64 i128:u128);
macro_rules! tuple {
($H:ident $($T:ident)*) => {
impl<$H: InputItem, $($T: InputItem),*> InputItem for ($H, $($T),*) {
fn input<I: Input + ?Sized>(src: &mut I) -> Self {
($H::input(src), $($T::input(src)),*)
}
}
tuple!($($T)*);
};
() => {}
}
tuple!(A B C D E F G);
macro_rules! array {
($($N:literal)*) => {
$(impl<T: InputItem> InputItem for [T; $N] {
fn input<I: Input + ?Sized>(src: &mut I) -> Self {
let mut arr = MaybeUninit::uninit();
let ptr = arr.as_mut_ptr() as *mut T;
unsafe {
for i in 0..$N {
ptr.add(i).write(src.input());
}
arr.assume_init()
}
}
})*
}
}
array!(1 2 3 4 5 6 7 8);
}
cotton_fn_