Compilare: user.cpp:8:0: warning: ignoring #pragma region Global [-Wunknown-pragmas] #pragma region Global Variables ^ user.cpp: In function ‘int main()’: user.cpp:50:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < to_visit.size(); i++) ^ user.cpp:53:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j<graph[tovisit].size(); j++) ^