hdu2561

import java.util.Arrays;
import java.util.Scanner;




public class P2561 {
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
int c=sc.nextInt();
while(c-->0){
int n=sc.nextInt();
int[] number=new int[n];
for (int i = 0; i < number.length; i++) {
number[i] = sc.nextInt();
}
Arrays.sort(number);
if (number.length>1) {
System.out.println(number[1]);
}else{
System.out.println(number[0]);
}
}
}


}