Compilare: user.cpp: In function ‘void bellman(const int&)’: user.cpp:41:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[nod].size() /*&& ciclu == false*/; i++) ^ user.cpp: In function ‘int main()’: user.cpp:90:30: warning: passing NULL to non-pointer argument 2 of ‘void* memset(void*, int, size_t)’ [-Wconversion-null] memset(v,NULL,sizeof v); ^