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

int main()
{
    int t;
    cin >> t;
    while(t--){
        int a, b, c;
        cin >> a >> b >> c;
        int max_value = max(a, max(b,c));
        int min_value = min(a, min(b,c));
        int operations = (max_value-min_value)/2;
        cout << operations << endl;
    }
}