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

int main() {
    int n;
    cin >> n;

    string best = "";  // 初始为空

    for (int i = 0; i < n; i++) {
        string s;
        cin >> s;

        // 如果当前字符串更长，或者长度相同但字典序更大，则更新
        if (s.length() > best.length() || 
            (s.length() == best.length() && s > best)) {
            best = s;
        }
    }

    cout << best << endl;

    return 0;
}