#include <iostream>

using namespace std;


int main() {
    unsigned int n, a, acopy, max_number = 0, value = 1000000000, local_number;
    cin >> n;
    while (n--) {
    	cin >> a;
        acopy = a;
        for (local_number = 0; acopy % 10 == 0; local_number++) acopy /= 10;
        if ( local_number > max_number) {
        	max_number = local_number;
        	value = a;
        }
        else if (local_number == max_number && a < value) value = a;
    }
    cout << value;
    return 0;
}