It doesn’t work like this, simply throwing out the code and asking to find the error. You could have simply given the link to your submission, for that matter. You are expected to tell what you tried, and what is your question accordingly.
However the idea was to choose 2 numbers from all numbers, and subtract the combinations that you can get when you choose 2 numbers from all such numbers whose magnitude is 2. So, if gt represents number of numbers greater than 2, and t represents number of numbers equal to 2, then (gt + t) C 2 - t C 2 will be the answer, i.e. e*(e-1)/2 - t*(t-1)/2 where e = gt + t