Compilare: user.cpp: In function ‘void dfs1(int)’: user.cpp:13:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<graf[nod].size(); i++) ^ user.cpp: In function ‘void dfs2(int)’: user.cpp:22:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<tgraf[nod].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:52:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<c[i].size(); j++) ^