Accessing data inside std::vector container

Question

I have three std::vector.

typedef std::pair< double,double > A;
typedef std::vector< A > B;
typedef std::vector< B > C;

I know how to access the element inside B like

B b;
b.at(0).first;
b.at(0).second;
And
C c;

How can I access the element of b using the container variable c? Thanks

Answer 1

C.at(0).at(0) will access first element of B. Because C is B's container.