Compilare: user.cpp: In function ‘void dfs1(int)’: user.cpp:18:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<graf[v].size();i++) ^ user.cpp: In function ‘void dfs2(int)’: user.cpp:29:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Tgraf[v].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:67:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<sol[i].size();j++) ^