UN wants to store information about the organization of its member countries and the provinces that these contain, attached with their GDP (gross domestic product)
The information about a determined province is stored in the following struct:
The information about a determined country is stored in the following struct:
The information about all the countries is stored in a vector of countries:
Using the previous definitions, implement the function
that returns the sum of the gross domestic products of all the provinces with density stricty greater than d of all the countries in p that starts with the letter c.
Observation You only need to submit the required classes; your main program will be ignored. Strictly obey the type definitions of the statement.