Compilare: main.cpp: In function 'void addtrie(Trie*&, std::__cxx11::string&, int, int)': main.cpp:33:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos == s.size()) { ~~~~^~~~~~~~~~~ main.cpp: In function 'void addFailure(Trie*&, std::__cxx11::string&, int, int)': main.cpp:43:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos == s.size()) { ~~~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:115:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < original.size(); i++) { ~~^~~~~~~~~~~~~~~~~