Compilare: main.cpp: In function 'void DFS(int)': main.cpp:23:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < G[node].size() ; i++) ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:49:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < sol.size() ; i++) ~~^~~~~~~~~~~~