Eroare de compilare: user.cpp: In function ‘void bellmanford(int, int)’: user.cpp:32:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<v[nod].size(); ++j) ^ user.cpp: In function ‘int main()’: user.cpp:53:5: error: ‘ifstream’ was not declared in this scope ifstream in("ubuntzei.in"); ^ user.cpp:53:14: error: expected ‘;’ before ‘in’ ifstream in("ubuntzei.in"); ^ user.cpp:54:5: error: ‘ofstream’ was not declared in this scope ofstream out("ubuntzei.out"); ^ user.cpp:54:14: error: expected ‘;’ before ‘out’ ofstream out("ubuntzei.out"); ^ user.cpp:56:5: error: ‘in’ was not declared in this scope in>>n>>m>>k; ^ user.cpp:95:5: error: ‘out’ was not declared in this scope out<<d[(1<<k)-1][k-1]<<endl;; ^ user.cpp:95:28: error: ‘endl’ was not declared in this scope out<<d[(1<<k)-1][k-1]<<endl;; ^