#include <iostream>
#include <algorithm>
using namespace std;

int t, i, j, k, ans;
int main(){
    cin >> t;
    long long a[t], b[t], c[t];
    for(i = 0; i < t; i++) cin >> a[i] >> b[i] >> c[i];
    for(i = 0; i < t; i++){
        ans = 0;
        if(a[i] == c[i]) {ans += 1; a[i] -= 1;}
        if(a[i] > c[i]) {j = a[i]; a[i] = c[i]; c[i] = j;}
        if(a[i] <= b[i] && c[i] >= b[i]) {
             if(b[i] <= 2) ans = -1;
             else if(b[i] - a[i] == 1) ans += 2;
             else ans += min(c[i] - b[i] + 1, b[i] - a[i] + 1);
        }
        cout << ans << endl;
    }
    return 0;
}