use std::io::*;

fn main() {
    let mut s: String = String::new();
    std::io::stdin().read_to_string(&mut s).ok();
    let mut itr = s.trim().split_whitespace();
    let n: usize = itr.next().unwrap().parse().unwrap();
    for _ in 0..n {
        let mut a: usize = itr.next().unwrap().parse().unwrap();
        let b: usize = itr.next().unwrap().parse().unwrap();
        let mut c: usize = itr.next().unwrap().parse().unwrap();
        let mut ans = 1 << 60;
        let mut cnt = 0;
        if a < c {
            std::mem::swap(&mut a, &mut c);
        }
        if a == c {
            c -= 1;
            cnt += 1;
        }
        if c == 0 {
            println!("-1",);
            continue;
        }

        // b max
        if (b > a && b > c) || (a > b && c > b) {
            println!("{}", cnt);
            continue;
        }
        if c - 1 > 0 {
            ans = std::cmp::min(ans, cnt + (b - (c - 1)));
        }

        let mut tmp = 0;
        if b - 1 > 0 {
            tmp += a - (b - 1);
            if c == b - 1 {
                tmp += 1;
                c -= 1;
            }
            if c != 0 {
                ans = std::cmp::min(ans, cnt + tmp);
            }
        }
        if ans != (1 << 60) {
            println!("{}", ans);
        } else {
            println!("-1",);
        }
    }
}