Chewbacca and Number Question

#1

Please give an explanation how the test case is being inverted to give the output. Not able to understand to solve the question.

#2

approach is simple
read a number as string (say s) .
if left most character is ‘9’

then leave the leftmost character as it is and for other characters simpl replace s[i] with min(s[i],‘9’-s[i])
else:

for each i replace s[i] with min(s[i],‘9’-s[i])
print s

#3

Here is the code :- https://ide.codingblocks.com/s/411768, but giving error for the min function. Please tell the error and how to resolve it.

#4

Note:

A. To Convert a Given Character Value to the Corresponding Integer Value:

Subtract '0'.

Example: '2' - '0' = (int) 2

B. To Convert a Given Integer Value to the Corresponding Character:

Add '0'.

Example: 2 + '0' = 50 {ASCII Value for '2'}

see this:https://ide.codingblocks.com/s/412118

also for 99
output should be 90
Try to debug with this