sorry for bad england I woke
Seen noftication
-is-this-fft- mention me
he call me stupi
how dare u?
dare u my frend
sorry for bad england I woke
Seen noftication
-is-this-fft- mention me
he call me stupi
how dare u?
dare u my frend
Screenshot from ~9 years ago Codeforces Beta! http://funkyimg.com/i/2M6zq.png
Copyrights to my friend
I recently spotted this problem of IOI 2018. I couldn't come up with a proper approach. Only thing that I know is the solution is associated with graph. Can you please help me to solve this problem?