Hello sir , this is Aryan Mittal from Android course .
I am that guy who asked you about what project to make .
So , sir I thought of an app and I have also searched on internet that nothing is made related to it but I am not quite sure that what all things are required to complete this .
So Below is the proposal of the app I am thinking of making but it would require Codeforces API and I haven’t worked with API before so what could be the reference for that .
So , the main idea behind the app is to show your profile , the next contest on codeforces , check your weak and strong topics by the tag of last unsolved problem on codeforces in contest , An upsolve section having all 
problems and last problem which I was not able to solve in the contest so far .
Below is the template which will brief further .
So , Sir I just wanted to ask what all things I should definitely know to get started with this project .
Thank you sir !!