A

#include <bits/stdc++.h>

using namespace std;

#define _test   int _TEST; cin>>_TEST; while(_TEST--)

int main()
{
    _test
    {
        int x, y, k;
        cin>>x>>y>>k;

        if(y <= x)      cout<<x<<"\n";
        else
        {
            x += k;
            x = min(x, y);

            cout<<y + (y-x)<<"\n";
        }
    }
}