#include <iostream>

using namespace std;

int main() {

    int arrLength;
    int temp;
    int fmax = -2100000000, smax = -2100000000;

    cin >> arrLength;

    for (int i = 0; i < arrLength; i++) {
        cin >> temp;

        if (temp > fmax)
        {
            smax = fmax;
            fmax = temp;
        }
    }

    cout << smax << "\n";


    return 0;
}