Nothing to say, to be honest. Please watch if you're interested in that how problems A–F1 are solved: https://youtu.be/OtiLL5bJ76Y (the video is already on the channel, high quality can take some time).
Codeforces Round 1036, Div. 1 + Div. 2 — Screencast & Editorial
Nothing to say, to be honest. Please watch if you're interested in that how problems A–F1 are solved: https://youtu.be/OtiLL5bJ76Y (the video is already on the channel, high quality can take some time).