#include <iostream>

using namespace std;
int n,a,b,c;
int main()
{
    cin>>n;
    while (n--){
        cin>>a>>b>>c;
        for (int i=0;i<2000;i++){
            if (a-i+(b-i)==c-i) {
                    cout<<i<<"\n";
                    break;
        }
    }
    }
    return 0;
}