Compilare: user.cpp: In function ‘std::string SetLocation(std::string)’: user.cpp:19:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < stiva.size(); i++) ^ user.cpp: In function ‘bool lexcomp(std::string, std::string)’: user.cpp:30:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < s1.size() && i < s2.size(); i++) ^ user.cpp:30:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < s1.size() && i < s2.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:82:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < locatii.size(); i++) ^