#include <cstdio>
 #define min(a, b) (a) < (b) ? (a) : (b)
 #define max(a, b) (a) > (b) ? (a) : (b)
 int main(void)
 {
   #ifndef ONLINE_JUDGE
   freopen("in.txt", "r", stdin);
   #endif // ONLINE_JUDGE
   int Case;
   scanf("%d", &Case);
   int n, L, Min, Max;
   while (Case--) {
     Min = -; Max = -;
     scanf("%d%d", &L, &n);
     int tmp;
     while (n--) {
       scanf("%d", &tmp);
       int t1 = min(tmp, L - tmp);
       int t2 = max(tmp, L - tmp);
       if (Min < t1)
         Min = t1;
       if (Max < t2)
         Max = t2;
     }
     printf("%d %d\n", Min, Max);
   }
   ;
 }

 import java.util.*;
 public class ants {

     public static void main(String[] args) {
         // TODO Auto-generated method stub
         Scanner input = new Scanner(System.in);
         int Case;
         Case = input.nextInt();
         ) {
             int L;
             int n;
             L = input.nextInt();
             n = input.nextInt();
             int Max, Min;
             Max = Min = ;
             ) {
                 int tmp;
                 tmp = input.nextInt();
                 int Left = tmp, Right = L - tmp;
                 if (Left < Right) {
                     Min = (Min < Left ? Left : Min);
                     Max = (Max < Right ? Right : Max);
                 }
                 else {
                     Min = (Min < Right ? Right : Min);
                     Max = (Max < Left ? Left : Max);
                 }
             }
             System.out.println(Min + " " + Max);
         }
     }

 }