Compilare: main.cpp: In function 'void AddWord(Node*, int, std::__cxx11::string, int)': main.cpp:40:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos == s.length() || node->lastUpdate <= ind - 2) ~~~~^~~~~~~~~~~~~ main.cpp: In function 'void RemoveWord(Node*, int, std::__cxx11::string)': main.cpp:59:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos == s.length()) ~~~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:74:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0;j < s.length();++j) ~~^~~~~~~~~~~~ main.cpp:82:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0;j < s.length();++j) ~~^~~~~~~~~~~~