Compilare: user.cpp: In function ‘void bfs()’: user.cpp:59:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod].size();++i) ^ user.cpp: In function ‘void dfs(int, int)’: user.cpp:74:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod].size();++i) ^ user.cpp: In function ‘int main()’: user.cpp:95:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=1;j!=S[i].size();++j) ^