#include <bits/stdc++.h>
using namespace std;

void solve() {
    int a, b, c;
    cin >> a >> b >> c;
    if ((a < b && b > c && a != c) || (a > b && b < c && a != c)) {
        cout << 0 << endl;
        return;
    }
    if (a == c) {
        if (a == b) {
            if (a >= 3) {
                cout << 3 << endl;
                return;
            } else {
                cout << -1 << endl;
                return;
            }
        }
        if (a == 1 || (b == 1 && a == 2)) {
            cout << -1 << endl;
            return;
        }
        cout << 1 << endl;
        return;
    }
    if (abs(a - c) == 1) {
        if (min(a, c) == 1) {
            cout << -1 << endl;
            return;
        }
        if (b == min(a, c)) {
            cout << 1 << endl;
        } else {
            cout << 2 << endl;
        }
        return;
    }
    if (min(a, c) == 1) {
        cout << -1 << endl;
        return;
    }
    cout << min(abs(a - b), abs(b - c)) + 1 << endl;
}

int main() {
    int t;
    cin >> t;
    for (int i = 0; i < t; i++) solve();
}