11:2

#include<iostream>
#include<stack>
using namespace std;
void push(int a);
bool isFull(int n);
bool isEmpty();
int pop();
int getMin();
//This is the STL stack (http://quiz.geeksforgeeks.org/stack-container-adaptors-the-c-standard-template-library-stl/).
stack<int> s;
int main(){
    int t;
    cin>>t;
    while(t--){
        int n,a;
        cin>>n;
        while(!isEmpty()){
            pop();
        }
        while(!isFull(n)){
            cin>>a;
            push(a);
        }
        cout<<getMin()<<endl;
    }
}// } Driver Code Ends


/*Complete the function(s) below*/
void push(int a)
{
     s.push (a);
}

bool isFull(int n)
{
     return n == s.size();
}

bool isEmpty()
{
    return s.empty();
}

int pop()
{
    s.pop();
}

int getMin()
{
    int mn = 2e9;

    while ( !s.empty() ) {
        mn = min ( s.top(), mn );
        s.pop();
    }

    return mn;
}