#include <iostream>
#include <cmath>
#include <iomanip>
#include <vector>
#include <algorithm>
    using namespace std;
    int main() {
        vector <int> array;
        int n, a, b;
        cin >> n;
        for (int i = 0; i<n; i++){
            int vvod;
            cin >> vvod;
            if (vvod > 0 ) { array.push_back(vvod);}
        }
        for (int i =1; i < array.size() -1; i++){
            if (array[i-1] < array [i]) { a = array [i-1];}
        }
        cout << a;

        }