Compilare: user.cpp: In function ‘void dj(int)’: user.cpp:86:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < graf[currentNode].size(); i++) ^ user.cpp:73:18: warning: unused variable ‘previous’ [-Wunused-variable] str current, previous; ^ user.cpp: In function ‘int main()’: user.cpp:122:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < forts.size(); i++) ^