#pragma once

#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>

namespace stl_containers {

[[nodiscard]] auto first_unique(const std::vector<std::string>& words) -> std::string;
[[nodiscard]] auto group_anagrams(const std::vector<std::string>& words)
    -> std::unordered_map<std::string, std::vector<std::string>>;
[[nodiscard]] auto has_duplicate(const std::vector<int>& data) -> bool;

}  // namespace stl_containers