#include <iostream>

 using namespace std;

 int main()

 {

     int t;

     cin >> t;

     while(t--)

     {

         int len, ants, sum = ;

         int min_t = , max_t = ;

         cin >> len >> ants;

         int length;

         for(int i = ; i <= ants; i++)

         {

             cin >> length;

             min_t = max(min_t, min(length, len-length));///停留在木棒上，可能用的最短时间的最大值

             max_t = max(max_t, max(length, len-length));///可能的最大时间的最大值

         }

         cout << min_t << " " << max_t << endl;

     }

     return ;

 }