Compilare: main.cpp: In function 'int main()': main.cpp:77:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s.size(); ++i) ~~^~~~~~~~~~ main.cpp: In instantiation of 'Trie<Alphabet, Container>::Trie(int) [with Alphabet = int; Container = std::vector<int>]': main.cpp:72:76: required from here main.cpp:62:7: warning: 'Trie<int, std::vector<int> >::_size' will be initialized after [-Wreorder] int _size; ^~~~~ main.cpp:61:28: warning: 'std::vector<std::unique_ptr<Trie<int, std::vector<int> >, std::default_delete<Trie<int, std::vector<int> > > >, std::allocator<std::unique_ptr<Trie<int, std::vector<int> >, std::default_delete<Trie<int, std::vector<int> > > > > > Trie<int, std::vector<int> >::_leaves' [-Wreorder] vector<unique_ptr<Trie>> _leaves; ^~~~~~~ main.cpp:13:3: warning: when initialized here [-Wreorder] Trie(int size): _size(size), _leaves(size), _wordsEndingHere(0), _numberLeaves(0){} ^~~~ main.cpp:69:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("trie.in", "r", stdin); ^ main.cpp:70:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("trie.out", "w", stdout); ^