#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    int t;
    cin >> t;
    while(t!=0)
    {
        int b,s,c;
        cin >> b >> s >> c;
        int i=0;
        
        for(;i<b;i++)
        {
            int x = b - i;
            int y = s - i;
            int z = c - i;
            if((x+y)==z)
                break;
        }
        cout << i << endl;
        t--;
    }
    return 0;
}