Compilare: user.cpp: In function ‘void dfs(int, std::vector<int>*, int)’: user.cpp:12:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<a[nod].size(); i++){ ^ user.cpp: In function ‘void dfs2(int, std::vector<int>*, int)’: user.cpp:22:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<a[nod].size(); i++){ ^ user.cpp: In function ‘int main()’: user.cpp:57:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<rasp[i].size()-1; j++){ ^ user.cpp:58:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (k=0; k<rasp[i].size()-1; k++){ ^ user.cpp:69:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (k=0; k<rasp[j].size(); k++){ ^