Today i was randomly surfing the net and found this looksery-snapchat

also in another article its written

Now Looksery, an Odesa-developed real time face-changing and tracking technology, has reportedly trumped the Viewdle deal and become the second -- and by far the largest -- multimillion-dollar tech acquisition in Ukraine’s history so far.

So congrats

Today i was coding a div2c problem

i got the idea and almost had good pseudo code in my mind

Then i started coding and took more than 2 hours to debug

What was the problem i cant implement because i dont have enough practise or is it because i didnt write down pseudo code ?

Thanks