#include <iostream>
#include <cmath>
#include <string>
using namespace std;

const string ERROR_NOT_NUMBER = "Ошибка: должно быть число";

int amax(int* a, int k)
{
	bool status = true;
	int* b = new int[k];
	for (int i = 0; i < k; i++) {
		b[i] = a[i];
	}
	int max = b[0];
	while (status) {
		max = b[0];
		int index = 0;
		int schet = 1;
		for (int i = 1; i < k; i++) {
			if (b[i] > max) {
				max = b[i];
				index = i;
			}
			if (b[i] == max) {
				schet++;
			}
		}
		if (schet < 2) {
			b[index] = std::numeric_limits<int>::min();

		}
		else {
			status = false;
		}
	}
	return max;
}
int main() {
	try {
		int k = 0;
		cin >> k;
		if (!cin) {
			throw ERROR_NOT_NUMBER;
			return -1;
		}
		int* a = new int[k];
		for (int i = 0; i < k; i++) {
			cin >> a[i];
			if (!cin) {
				throw ERROR_NOT_NUMBER;
				return -1;
			}
		}
		cout << amax(a, k) << "\n";
	}
	catch(const char* error){
		cerr << error << "\n";
		return 0;
	}
}