iiitv/ChefLib

// Code made by Monal5031/monalshadi
#include "bits/stdc++.h"

using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);

    long int tc;
    cin >> tc;
    while (tc--) {
        long long k, a, b;
        cin >> k >> a >> b;

        long long maxi = max(a, b);
        long long mini = min(a, b);

        if (maxi - mini == k/2 && k % 2 == 0) {
            cout << "0\n";
        } else if (maxi - mini - 1 < k/2) {
            cout << (maxi - mini - 1) << "\n";
        } else {
            cout << (k - maxi + mini - 1) << "\n";
        }
    }
    return 0;
}