#include <cstdio>
#include <iostream>
#include <random>

using namespace std;

constexpr int N = 114514;

int n;
int nums[N];
int basket[N];
int minn = N;

int main () {

	freopen ("arrayy.in", "r", stdin);
	freopen ("arrayy.out", "w", stdout);

	cin >> n;
	for (int i = 1; i <= n; i++) {
		cin >> nums[i];
		basket[nums[i]]++;
		if (nums[i] < minn) {
			minn = nums[i];
		}
	}

	if (basket[minn] == 1) {
		cout << minn << endl;
		return 0;
	}

	mt19937 generator;
	uniform_int_distribution<int> distribution(0, minn);
	cout << distribution (generator) << endl;

	return 0;
}