Plz explain output?

Question

C challenge question?
https://code.sololearn.com/cjZUWJbhTZna/?ref=app

Answer 1

unsigned char: represents one character.
It occupies 1 byte in memory.
Can store any value from 0 to 255.

The value of 300 exceeded the allowed limit by 45 points.

255
/ \
0 0
\ /
255

https://code.sololearn.com/c2y5Ph1cyuYZ/?ref=app