Compilare: main.cpp: In function 'void print(std::vector<std::vector<int> >)': main.cpp:29:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sccList.size(); i++) { ~~^~~~~~~~~~~~~~~~ main.cpp:30:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < sccList[i].size(); j++) { ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void tarjan(int)': main.cpp:43:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < adj[x].size(); i++) { ~~^~~~~~~~~~~~~~~