結果
問題 | No.1178 Can you draw a Circle? |
ユーザー |
![]() |
提出日時 | 2020-12-08 03:31:05 |
言語 | Rust (1.83.0 + proconio) |
結果 |
WA
|
実行時間 | - |
コード長 | 10,354 bytes |
コンパイル時間 | 12,826 ms |
コンパイル使用メモリ | 382,412 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-09-17 14:19:34 |
合計ジャッジ時間 | 11,650 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge6 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 5 WA * 10 |
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, out: O) {let mut out = KOutput::new(out);let [a, b, c, d, e, f]: [f64; 6] = kin.input();// ax^2 + by^2 + cx + dy + e = f// (x - s)^2 + (y - t)^2 = r^2// x^2 - 2sx + s^2 + y^2 - 2ty + t^2 = r^2// a = b// s = -c / 2// t = -d / 2// r^2 - s^2 - t^2 = (f - e) / a// r^2 = (f - e) / a + (c ^ 2 + d ^ 2) / 4assert_eq!(a, b);let r2 = (f - e) / a + (c * c + d * d) / 4.;let r = r2.sqrt();outln!(out, r);}// -----------------------------------------------------------------------------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::*,iter::FromIterator,marker::PhantomData,mem::{self, MaybeUninit},ptr, slice, 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 read = self.src.read(&mut self.buf[self.len..]).unwrap();self.len += read;read}}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 }pub struct KOutput<W: Write> {dest: W,delim: bool,}impl<W: Write> KOutput<W> {pub fn new(dest: W) -> Self {Self { dest, delim: false }}pub fn bytes(&mut self, s: &[u8]) {self.dest.write_all(s).unwrap();}pub fn byte(&mut self, b: u8) {self.bytes(slice::from_ref(&b));}pub fn output<T: OutputItem>(&mut self, x: T) {if self.delim {self.byte(b' ');}self.delim = true;x.output(self);}pub fn ln(&mut self) {self.delim = false;self.byte(b'\n');self.flush_debug();}pub fn inner(&mut self) -> &mut W {&mut self.dest}pub fn seq<T: OutputItem, I: IntoIterator<Item = T>>(&mut self, iter: I) {for x in iter.into_iter() {self.output(x);}}pub fn flush(&mut self) {self.dest.flush().unwrap();}pub fn flush_debug(&mut self) {if cfg!(debug_assertions) {self.flush();}}}pub trait OutputItem {fn output<W: Write>(self, dest: &mut KOutput<W>);}impl OutputItem for &str {fn output<W: Write>(self, dest: &mut KOutput<W>) {dest.bytes(self.as_bytes());}}impl OutputItem for char {fn output<W: Write>(self, dest: &mut KOutput<W>) {self.encode_utf8(&mut [0; 4]).output(dest);}}macro_rules! output_fmt {($($T:ty)*) => {$(impl OutputItem for $T {fn output<W: Write>(self, dest: &mut KOutput<W>) {write!(dest.inner(), "{}", self).unwrap();}})*}}output_fmt!(f32 f64);macro_rules! output_int {($conv:ident; $U:ty; $($T:ty)*) => {$(impl OutputItem for $T {fn output<W: Write>(self, dest: &mut KOutput<W>) {let mut buf = MaybeUninit::<[u8; 20]>::uninit();unsafe {let ptr = buf.as_mut_ptr() as *mut u8;let ofs = $conv(self as $U, ptr, 20);dest.bytes(slice::from_raw_parts(ptr.add(ofs), 20 - ofs));}}}impl OutputItem for &$T {fn output<W: Write>(self, dest: &mut KOutput<W>) {(*self).output(dest);}})*};}output_int!(i64_to_bytes; i64; isize i8 i16 i32 i64);output_int!(u64_to_bytes; u64; usize u8 u16 u32 u64);static DIGITS_LUT: &[u8; 200] = b"0001020304050607080910111213141516171819\2021222324252627282930313233343536373839\4041424344454647484950515253545556575859\6061626364656667686970717273747576777879\8081828384858687888990919293949596979899";unsafe fn i64_to_bytes(x: i64, buf: *mut u8, len: usize) -> usize {let (neg, x) = if x < 0 { (true, -x) } else { (false, x) };let mut i = u64_to_bytes(x as u64, buf, len);if neg {i -= 1;*buf.add(i) = b'-';}i}unsafe fn u64_to_bytes(mut x: u64, buf: *mut u8, len: usize) -> usize {let lut = DIGITS_LUT.as_ptr();let mut i = len;let mut two = |x| {i -= 2;ptr::copy_nonoverlapping(lut.add(2 * x), buf.add(i), 2);};while x >= 10000 {let rem = (x % 10000) as usize;two(rem % 100);two(rem / 100);x /= 10000;}let mut x = x as usize;if x >= 100 {two(x % 100);x /= 100;}if x >= 10 {two(x);} else {i -= 1;*buf.add(i) = x as u8 + b'0';}i}#[macro_export]macro_rules! out {($out:expr, $($args:expr),*) => {{ $($out.output($args);)* }};}#[macro_export]macro_rules! outln {($out:expr) => { $out.ln(); };($out:expr, $($args:expr),*) => {{out!($out, $($args),*);outln!($out);}}}#[macro_export]macro_rules! kdbg {($($v:expr),*) => {if cfg!(debug_assertions) { dbg!($($v),*) } else { ($($v),*) }}}}