I have complete course of c++ from solo learn... but i want to go deeper in c++ ..is solo learn have that platform?

Answer 1

I dont think that SoloLearn has advanced courses so far....
but you could look on the internet or just try difficult problems yourself:

For example:
Implement the fastest sort algorithm you can.

Answer 2

U can download Accelerated c++ book pdf best for cpp. this book covering all topics of STL vector and much more