#include "bits/stdc++.h"

using namespace std;
typedef long long int ll;
typedef pair<ll, ll > pi;  
typedef pair<pair<ll, ll >, ll > pii;  
vector<ll > vec;
vector<vector<ll > > vec2;
ll MOD = 1000000007;
ll INF = 1145141919454519;

int main(){

    ll T;
    cin >> T;

    for(ll i = 0; i < T; i++){
        ll a, b, c;
        cin >> a >> b >> c;

        ll t_a1, t_b1, t_c1;
        t_a1 = a; t_b1 = b; t_c1 = c;
        ll t_a2, t_b2, t_c2;
        t_a2 = a; t_b2 = b; t_b2 = c;

        if(a != c && (b > a && b > c)||(b < a && b < c)){
            //すでに条件を満たしている時
            cout << 0 << endl;
        }else{
            //1が含まれていたら真ん中を最大化するしかない
            if(a == 1 || c == 1){
                if(a==c){
                    cout << -1 << endl;
                }else if(b <= 2){
                    cout << -1 << endl;
                }else{
                    cout << b - max(a, c) + 1 << endl; 
                }
            }else{
                if(a == b && b == c && a == c){
                    if(a == 2){
                        cout << -1 << endl;
                    }else{
                        cout << 3 << endl;
                    }
                }else{
                    //中央を最小化
                    ll ans1 = b-min(a,c)+1;
                    //中央を最大化
                    ll ans2 = INF;
                    if(abs(a-c) == 2){
                        ans2 = 3;
                    }else if(abs(a-c) == 1){
                        ans2 = 2;
                    }else if(abs(a-c) == 0){
                        ans2 = 1;
                    }
                    cout << min(ans1, ans2) << endl;
                }
            }
        }

    }

}