include<iostream>

using namespace std;

int arrive[1000]; int leave[1000]; int main() {

int test,n,max,count;
cin>>test;
while(test--)
{   max=0;
    cin>>n;
    for(int i=0;i<n;++i)
    {

               cin>>arrive[i];
    }
     for(int i=0;i<n;++i)
    {

               cin>>leave[i];
    }
    for(int i=0;i<n;++i)
    {
            count=0;
           for(int j=0;j<n;++j)
           {
                    if (!(leave[j]<=arrive[i] or arrive[j]>=leave[i]))
                    {
                               ++count;
                    }
                    if(count>max)
                    max=count;
            }


    }
    cout<<count<<"\n";
}
    return 0;

}