use proconio::input;
use std::io::Write;

fn main() {
    input! { t: usize }
    let mut output = std::io::BufWriter::new(std::io::stdout().lock());

    for _ in 0..t {
        let ans = solve();
        writeln!(output, "{}", ans.unwrap_or(!0) as isize).unwrap();
    }
}

fn solve() -> Option<usize> {
    input! { n: usize }
    if n.count_ones() == 1 {
        None
    } else {
        let mask = (0..40)
            .map(|i| (1 << i) - 1)
            .find(|&mask| (n & mask).count_ones() > 1)
            .unwrap();

        let ans = mask + 1 - (n & mask);
        Some(ans)
    }
}

// 10101101 => 10110000