Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:20:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[nod].size(); i++) ^ user.cpp: In function ‘void dfsbc(int, int, int)’: user.cpp:44:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[nod].size(); i++) ^ user.cpp: In function ‘void afisare0()’: user.cpp:69:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < sol_nod.size(); i++) ^