Hello I need help with a c++ function for my project involving vectors. Here is the RME for it

//REQUIRES: v is not empty //EFFECTS: returns a summary of the dataset as (value, frequency) pairs // In the returned vector-of-vectors, the inner vector is a (value, frequency) // pair. The outer vector contains many of these pairs. The pairs should be // sorted by value. // { // {1, 2}, // {2, 3}, // {17, 1} // } // // This means that the value 1 occurred twice, the value 2 occurred 3 times, // and the value 17 occurred once

std::vectordouble, int> > summarize(std::vector<double> v);

Thanks!