using System.Collections.Generic; 

public class Analytics 

{

    public List<string> ReadLogs() 

    {

        // Assume already implemented

        return new List<string>(); 

    }

​

    public int GetUpgradePercentage() 

    {

        // TODO

        return 0;

    }

}

​

/*

Events:

<timestamp-seconds>,<user-id>,<event-type-char>

​

Example:

123,7,M

​

Event types:

I - Install app

U - Upgrade to premium (in-app payment)

O - Open / resume app

L - Leave app

M - Navigate to main screen

S - Navigate to settings screen

*/

​