Language: C++

#[allow(unused_imports)]
use std::char::*;
#[allow(unused_imports)]
use std::cmp::*;
#[allow(unused_imports)]
use std::collections::*;
use std::io::*;
use std::str::FromStr;

#[allow(unused_macros)]
macro_rules! debug {($($a:expr),*) => {println!(concat!($(stringify!($a), " = {:?}, "),*), $($a),*);}}
#[allow(unused_macros)]
macro_rules! input { ( source = $ s : expr , $ ( $ r : tt ) * ) => { let mut iter = $ s . split_whitespace ( ) ; let mut next = || { iter . next ( ) . unwrap ( ) } ; input_inner ! { next , $ ( $ r ) * } } ; ( $ ( $ r : tt ) * ) => { let stdin = std :: io :: stdin ( ) ; let mut bytes = std :: io :: Read :: bytes ( std :: io :: BufReader :: new ( stdin . lock ( ) ) ) ; let mut next = move || -> String { bytes . by_ref ( ) . map ( | r | r . unwrap ( ) as char ) . skip_while ( | c | c . is_whitespace ( ) ) . take_while ( | c |! c . is_whitespace ( ) ) . collect ( ) } ; input_inner ! { next , $ ( $ r ) * } } ; }
#[allow(unused_macros)]
macro_rules! input_inner { ( $ next : expr ) => { } ; ( $ next : expr , ) => { } ; ( $ next : expr , $ var : ident : $ t : tt $ ( $ r : tt ) * ) => { let $ var = read_value ! ( $ next , $ t ) ; input_inner ! { $ next $ ( $ r ) * } } ; }
#[allow(unused_macros)]
macro_rules! read_value { ( $ next : expr , ( $ ( $ t : tt ) ,* ) ) => { ( $ ( read_value ! ( $ next , $ t ) ) ,* ) } ; ( $ next : expr , [ $ t : tt ; $ len : expr ] ) => { ( 0 ..$ len ) . map ( | _ | read_value ! ( $ next , $ t ) ) . collect ::< Vec < _ >> ( ) } ; ( $ next : expr , chars ) => { read_value ! ( $ next , String ) . chars ( ) . collect ::< Vec < char >> ( ) } ; ( $ next : expr , usize1 ) => { read_value ! ( $ next , usize ) - 1 } ; ( $ next : expr , $ t : ty ) => { $ next ( ) . parse ::<$ t > ( ) . expect ( "Parse error" ) } ; }

#[derive(PartialEq, PartialOrd)]
pub struct Total<T>(pub T);
impl<T: PartialEq> Eq for Total<T> {}
impl<T: PartialOrd> Ord for Total<T> { fn cmp(&self, other: &Total<T>) -> std::cmp::Ordering { self.0.partial_cmp(&other.0).unwrap() }}

#[allow(dead_code)]
const MAX:usize = 100006;
#[allow(dead_code)]
const INF_U32:u32 = 1 << 31;
#[allow(dead_code)]
const INF_I32:i32 = 1 << 30;
#[allow(dead_code)]
const INF_U64:u64 = 1 << 63;
#[allow(dead_code)]
const INF_I64:i64 = 1 << 62;
#[allow(dead_code)]
const MOD:i64 = 1e9 as i64 + 7;


#[allow(dead_code)]
fn read<T: FromStr>() -> T {
    let stdin = stdin();
    let stdin = stdin.lock();
    let token: String = stdin
        .bytes()
        .map(|c| c.expect("failed to read char") as char)
        .skip_while(|c| c.is_whitespace())
        .take_while(|c| !c.is_whitespace())
        .collect();
    token.parse().ok().expect("failed to parse token")
}

#[allow(dead_code)]
fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().split_whitespace()
        .map(|e| e.parse().ok().unwrap()).collect()
}


#[allow(unused_imports)]
use std::f64;


fn main() {
    input!{w:f64,h:f64,x:f64,y:f64};

    println!("{}", (w*h)/2.0);

    if w/2.0 == x && h/2.0 == y {
        println!("1");
    } else {
        println!("0");
    }

}

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #[
    1 | #[allow(unused_imports)]
      |  ^
a.cc:3:2: error: invalid preprocessing directive #[
    3 | #[allow(unused_imports)]
      |  ^
a.cc:5:2: error: invalid preprocessing directive #[
    5 | #[allow(unused_imports)]
      |  ^
a.cc:10:2: error: invalid preprocessing directive #[
   10 | #[allow(unused_macros)]
      |  ^
a.cc:12:2: error: invalid preprocessing directive #[
   12 | #[allow(unused_macros)]
      |  ^
a.cc:14:2: error: invalid preprocessing directive #[
   14 | #[allow(unused_macros)]
      |  ^
a.cc:16:2: error: invalid preprocessing directive #[
   16 | #[allow(unused_macros)]
      |  ^
a.cc:19:2: error: invalid preprocessing directive #[
   19 | #[derive(PartialEq, PartialOrd)]
      |  ^
a.cc:22:100: error: too many decimal points in number
   22 | impl<T: PartialOrd> Ord for Total<T> { fn cmp(&self, other: &Total<T>) -> std::cmp::Ordering { self.0.partial_cmp(&other.0).unwrap() }}
      |                                                                                                    ^~~~~~~~~~~~~~
a.cc:24:2: error: invalid preprocessing directive #[
   24 | #[allow(dead_code)]
      |  ^
a.cc:26:2: error: invalid preprocessing directive #[
   26 | #[allow(dead_code)]
      |  ^
a.cc:28:2: error: invalid preprocessing directive #[
   28 | #[allow(dead_code)]
      |  ^
a.cc:30:2: error: invalid preprocessing directive #[
   30 | #[allow(dead_code)]
      |  ^
a.cc:32:2: error: invalid preprocessing directive #[
   32 | #[allow(dead_code)]
      |  ^
a.cc:34:2: error: invalid preprocessing directive #[
   34 | #[allow(dead_code)]
      |  ^
a.cc:38:2: error: invalid preprocessing directive #[
   38 | #[allow(dead_code)]
      |  ^
a.cc:51:2: error: invalid preprocessing directive #[
   51 | #[allow(dead_code)]
      |  ^
a.cc:60:2: error: invalid preprocessing directive #[
   60 | #[allow(unused_imports)]
      |  ^
a.cc:2:1: error: 'use' does not name a type
    2 | use std::char::*;
      | ^~~
a.cc:4:1: error: 'use' does not name a type
    4 | use std::cmp::*;
      | ^~~
a.cc:6:1: error: 'use' does not name a type
    6 | use std::collections::*;
      | ^~~
a.cc:7:1: error: 'use' does not name a type
    7 | use std::io::*;
      | ^~~
a.cc:8:1: error: 'use' does not name a type
    8 | use std::str::FromStr;
      | ^~~
a.cc:11:1: error: 'macro_rules' does not name a type
   11 | macro_rules! debug {($($a:expr),*) => {println!(concat!($(stringify!($a), " = {:?}, "),*), $($a),*);}}
      | ^~~~~~~~~~~
a.cc:13:1: error: 'macro_rules' does not name a type
   13 | macro_rules! input { ( source = $ s : expr , $ ( $ r : tt ) * ) => { let mut iter = $ s . split_whitespace ( ) ; let mut next = || { iter . next ( ) . unwrap ( ) } ; input_inner ! { next , $ ( $ r ) * } } ; ( $ ( $ r : tt ) * ) => { let stdin = std :: io :: stdin ( ) ; let mut bytes = std :: io :: Read :: bytes ( std :: io :: BufReader :: new ( stdin . lock ( ) ) ) ; let mut next = move || -> String { bytes . by_ref ( ) . map ( | r | r . unwrap ( ) as char ) . skip_while ( | c | c . is_whitespace ( ) ) . take_while ( | c |! c . is_whitespace ( ) ) . collect ( ) } ; input_inner ! { next , $ ( $ r ) * } } ; }
      | ^~~~~~~~~~~
a.cc:15:1: error: 'macro_rules' does not name a type
   15 | macro_rules! input_inner { ( $ next : expr ) => { } ; ( $ next : expr , ) => { } ; ( $ next : expr , $ var : ident : $ t : tt $ ( $ r : tt ) * ) => { let $ var = read_value ! ( $ next , $ t ) ; input_inner ! { $ next $ ( $ r ) * } } ; }
      | ^~~~~~~~~~~
a.cc:17:1: error: 'macro_rules' does not name a type
   17 | macro_rules! read_value { ( $ next : expr , ( $ ( $ t : tt ) ,* ) ) => { ( $ ( read_value ! ( $ next , $ t ) ) ,* ) } ; ( $ next : expr , [ $ t : tt ; $ len : expr ] ) => { ( 0 ..$ len ) . map ( | _ | read_value ! ( $ next , $ t ) ) . collect ::< Vec < _ >> ( ) } ; ( $ next : expr , chars ) => { read_value ! ( $ next , String ) . chars ( ) . collect ::< Vec < char >> ( ) } ; ( $ next : expr , usize1 ) => { read_value ! ( $ next , usize ) - 1 } ; ( $ next : expr , $ t : ty ) => { $ next ( ) . parse ::<$ t > ( ) . expect ( "Parse error" ) } ; }
      | ^~~~~~~~~~~
a.cc:20:1: error: 'pub' does not name a type
   20 | pub struct Total<T>(pub T);
      | ^~~
a.cc:21:1: error: 'impl' does not name a type
   21 | impl<T: PartialEq> Eq for Total<T> {}
      | ^~~~
a.cc:22:1: error: 'impl' does not name a type
   22 | impl<T: PartialOrd> Ord for Total<T> { fn cmp(&self, other: &Total<T>) -> std::cmp::Ordering { self.0.partial_cmp(&other.0).unwrap() }}
      | ^~~~
a.cc:25:10: error: found ':' in nested-name-specifier, expected '::'
   25 | const MAX:usize = 100006;
      |          ^
      |          ::
a.cc:25:7: error: 'MAX' does not name a type
   25 | const MAX:usize = 100006;
      |       ^~~
a.cc:27:14: error: found ':' in nested-name-specifier, expected '::'
   27 | const INF_U32:u32 = 1 << 31;
      |              ^
      |              ::
a.cc:27:7: error: 'INF_U32' does not name a type
   27 | const INF_U32:u32 = 1 << 31;
      |       ^~~~~~~
a.cc:29:14: error: found ':' in nested-name-specifier, expected '::'
   29 | const INF_I32:i32 = 1 << 30;
      |              ^
      |              ::
a.cc:29:7: error: 'INF_I32' does not name a type
   29 | const INF_I32:i32 = 1 << 30;
      |       ^~~~~~~
a.cc:31:14: error: found ':' in nested-name-specifier, expected '::'
   31 | const INF_U64:u64 = 1 << 63;
      |              ^
      |              ::
a.cc:31:7: error: 'INF_U64' does not name a type
   31 | const INF_U64:u64 = 1 << 63;
      |       ^~~~~~~
a.cc:33:14: error: found ':' in nested-name-specifier, expected '::'
   33 | const INF_I64:i64 = 1 << 62;
      |              ^
      |              ::
a.cc:33:7: error: 'INF_I64' does not name a type
   33 | const INF_I64:i64 = 1 << 62;
      |       ^~~~~~~
a.cc:35:10: error: found ':' in nested-name-specifier, expected '::'
   35 | const MOD:i64 = 1e9 as i64 + 7;
      |          ^
      |          ::
a.cc:35:7: error: 'MOD' does not name a type
   35 | const MOD:i64 = 1e9 as i64 + 7;
      |       ^~~
a.cc:39:1: error: 'fn' does not name a type
   39 | fn read<T: FromStr>() -> T {
      | ^~
a.cc:52:1: error: 'fn' does not name a type
   52 | fn read_vec<T: std::str::FromStr>() -> Vec<T> {
      | ^~
a.cc:61:1: error: 'use' does not name a type
   61 | use std::f64;
      | ^~~
a.cc:64:1: error: 'fn' does not name a type
   64 | fn main() {
      | ^~