#include <iostream>
#include <algorithm>

using namespace std;

int main() {
	int n;
	cin >> n;
	int* a = new int[n];
	for (int i = 0; i < n; ++i) {
		cin >> a[i];
	}
	int mn = 1e9;
	for (int i = 0; i < n; ++i) {
		if (a[i] < mn && a[i] > 0) mn = a[i];
	}
	cout << mn << endl;
	return 0;
}