Compilare: user.cpp: In function ‘void insertTrie(std::string&)’: user.cpp:28:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<str.length();i++) ^ user.cpp: In function ‘void compact(trie*, trie*, int)’: user.cpp:61:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod->dp.size();i++) ^ user.cpp:55:29: warning: ‘fiu’ may be used uninitialized in this function [-Wmaybe-uninitialized] fiu->cost+=nod->cost; ^