gistfile1.txt

#include <iostream>

//
// Created by lectr on 24.03.2021.
//
#include <unordered_map>
#include <string>

int main() {
    int n;
    std::unordered_map<std::string, int> map;
    std::cin >> n;
    for (int i = 0; i < n; i++) {
        std::string a;
        std::getline(std::cin, a);
        if (map.find(a) == map.end()) {
            std::cout << a << "\n";
            map[a] = 1;
        }
    }
}