Compilare: user.cpp: In member function ‘void trie::addWord(const string&, int)’: user.cpp:49:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < str.size (); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:97:22: warning: unused variable ‘dr’ [-Wunused-variable] int nr, last, x, dr, sol; ^ user.cpp:85:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("ratina.in", "r", stdin); ^ user.cpp:86:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("ratina.out", "w", stdout); ^