Compilare: user.cpp: In function ‘void getMaxLec(std::__cxx11::string&)’: user.cpp:246:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i <= s.size(); i ++) ~~^~~~~~~~~~~ user.cpp:250:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 1; j < s.size(); j ++) ~~^~~~~~~~~~ user.cpp:275:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = k; i < s.size(); i ++) ~~^~~~~~~~~~