Compilare: main.cpp: In function 'void insert(std::__cxx11::string, int)': main.cpp:32:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<w.length(); ++i) ~^~~~~~~~~~~ main.cpp: In function 'void drumuri()': main.cpp:48:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<ord.size(); ++i) ~^~~~~~~~~~~ main.cpp: In function 'void calc(trie*)': main.cpp:72:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j<aux->words.size(); ++j) ~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:95:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<a.length(); ++i) ~^~~~~~~~~~~