Compilare: user.cpp: In function ‘int main()’: user.cpp:86:12: warning: variable ‘aux’ set but not used [-Wunused-but-set-variable] bool aux; ^ user.cpp:75:33: 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); ^ user.cpp:76:35: 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); ^ user.cpp:82:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s); ^ user.cpp:82:19: warning: ‘s’ may be used uninitialized in this function [-Wmaybe-uninitialized]