C++ vector, what does this code mean?

Question

I have this code:

 const int maxnodes = 5000;
 struct Edge 
 {
   int to, rev;
   int f, cap;
 };

 vector g[maxnodes];

This is qui

Answer 1

int nodes = maxnodes, src, dest;

This means all are integer and nodes is initialized with maxnodes

vector g[maxnodes] is the array of vector.

Vector is like a dynamic array. g[x] will be pointing to a vector. g[x][y] will point to a Edge .