/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		int casos;
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		casos = Integer.parseInt(br.readLine());
		for(int c = 0; c<casos;c++) {
			int temp[] = new int[2];
			int N = Integer.parseInt(br.readLine()); //Linea 1 caso
			int maxi =-1; temp[0]= temp[1]=-1;
			StringTokenizer st = new StringTokenizer(br.readLine()); //Linea 2 caso
			for(int i = 0; st.hasMoreTokens();i++)	{ 
				temp[i%2] = Integer.parseInt(st.nextToken());	
				maxi = Math.max(Math.min(temp[i%2],temp[(i+1)%2]), maxi);
			}
			System.out.println(maxi);}}
 
}

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MgoyCjUgNwozCjQgNyA2

2
2
5 7
3
4 7 6