Problem:
Score : 500 points

Problem Statement

There are N Snuke Cats numbered 1, 2, \ldots, N, where N is even.

Each Snuke Cat wears a red scarf, on which his favorite non-negative integer is written.

Recently, they learned the operation called xor (exclusive OR).

What is xor?

For n non-negative integers x_1, x_2, \ldots, x_n, their xor, x_1~\textrm{xor}~x_2~\textrm{xor}~\ldots~\textrm{xor}~x_n is defined as follows:

When x_1~\textrm{xor}~x_2~\textrm{xor}~\ldots~\textrm{xor}~x_n is written in base two, the digit in the 2^k's place (k \geq 0) is 1 if the number of integers among x_1, x_2, \ldots, x_n whose binary representations have 1 in the 2^k's place is odd, and 0 if that count is even.

For example, 3~\textrm{xor}~5 = 6.

They wanted to use this operation quickly, so each of them calculated the xor of the integers written on their scarfs except his scarf.

We know that the xor calculated by Snuke Cat i, that is, the xor of the integers written on the scarfs except the scarf of Snuke Cat i is a_i.
Using this information, restore the integer written on the scarf of each Snuke Cat.

Constraints

All values in input are integers.

2 \leq N \leq 200000

N is even.

0 \leq a_i \leq 10^9

There exists a combination of integers on the scarfs that is consistent with the given information.

Input

Input is given from Standard Input in the following format:

N
a_1 a_2 \ldots a_N

Output

Print a line containing N integers separated with space.

The i-th of the integers from the left should represent the integer written on the scarf of Snuke Cat i.

If there are multiple possible solutions, you may print any of them.

Sample Input 1

4
20 11 9 24

Sample Output 1

26 5 7 22

5~\textrm{xor}~7~\textrm{xor}~22 = 20

26~\textrm{xor}~7~\textrm{xor}~22 = 11

26~\textrm{xor}~5~\textrm{xor}~22 = 9

26~\textrm{xor}~5~\textrm{xor}~7 = 24

Thus, this output is consistent with the given information.

Solution in Rust (1.42.0) (judge verdict: Accepted)

#![allow(unused_imports)]
#![allow(unused_macros)]
// use proconio::input;
use std::cmp::Ordering::*;
use std::collections::{BTreeMap, BTreeSet};
use std::io::{self, BufWriter, Write};
use std::str::{self, SplitAsciiWhitespace};

// I have no idea what I'm doing

macro_rules! answer {
    ($out:ident, $ans:expr) => {
        writeln!($out, "{}", $ans)
    };
}

fn main() -> Result<(), io::Error> {
    let (stdin, stdout) = (io::stdin(), io::stdout());
    let mut scan = UnsafeScanner::new(stdin.lock());
    let mut out = BufWriter::new(stdout.lock());

    let n: usize = scan.token();
    let a: Vec<_> = (0..n).map(|_| scan.token::<u32>()).collect();

    let xor = a.iter().fold(0, |acc, &x| acc ^ x);

    for x in a {
        write!(out, "{} ", xor ^ x)?;
    }
    writeln!(out)
}

///////////////////////////////////////////////////////////////////////////////////////////////////

/// Mostly copied from https://github.com/EbTech/rust-algorithms/blob/master/src/scanner.rs
/// Same API as Scanner but nearly twice as fast, using horribly unsafe dark arts
/// **REQUIRES** Rust 1.34 or higher
pub struct UnsafeScanner<R> {
    reader: R,
    buf_str: Vec<u8>,
    buf_iter: SplitAsciiWhitespace<'static>,
}

impl<R: io::BufRead> UnsafeScanner<R> {
    pub fn new(reader: R) -> Self {
        Self {
            reader,
            buf_str: vec![],
            buf_iter: "".split_ascii_whitespace(),
        }
    }

    /// This function should be marked unsafe, but noone has time for that in a
    /// programming contest. Use at your own risk!
    pub fn token<T: str::FromStr>(&mut self) -> T {
        loop {
            if let Some(token) = self.buf_iter.next() {
                return token.parse().ok().expect("Failed parse [Scanner]");
            }
            self.buf_str.clear();
            self.reader
                .read_until(b'\n', &mut self.buf_str)
                .expect("Failed read");
            self.buf_iter = unsafe {
                let slice = str::from_utf8_unchecked(&self.buf_str);
                std::mem::transmute(slice.split_ascii_whitespace())
            }
        }
    }

    pub fn pair<T: str::FromStr>(&mut self) -> (T, T) {
        (self.token(), self.token())
    }
}

// aka #![feature(bool_to_option)]
trait BoolThen {
    fn then_<T>(self, f: impl FnOnce() -> T) -> Option<T>;
}

impl BoolThen for bool {
    fn then_<T>(self, f: impl FnOnce() -> T) -> Option<T> {
        if self {
            Some(f())
        } else {
            None
        }
    }
}

trait BoolToYes {
    fn yes(self) -> &'static str;
}

impl BoolToYes for bool {
    fn yes(self) -> &'static str {
        if self {
            "YES"
        } else {
            "NO"
        }
    }
}