This USB-OTG thingy, alongside with my keyboard, made me very happy and excited for a past couple of days. Consider buying one of those if you travel a lot and don't want to bring your laptop everywhere. Here, I use my phone + Termux + NeoVim, so I do not need a mouse. I save the code on my phone and submit it through the browser (tho in the future I will probably use something like submitter https://mirror.codeforces.com/blog/entry/136604).
You remind me of me back then, pushing myself till I hit pupil. It was rough, working on a busted tablet, switching between the keyboard and mouse all the time.
Wireless keyboard would be even more cool here
Legendary Giant Keyboard.