Compilare: user.cpp: In function ‘void dfs(int, int, std::vector<int>*, std::vector<int>*, int*, int*)’: user.cpp:13:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i=0;i<a[nod].size();i++) ^ user.cpp: In function ‘void cauta(int)’: user.cpp:50:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<b[i].size()&&ok;j++) ^ user.cpp:63:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<a[i].size();j++) ^