I am not able to understand the question

plz explain the question

Hey @LPU11910344
So basically in this question, you’ll be given a number, and you can edit the number to make it the smallest possible number.
The editing can be done in the following way:
pick up any digit t, you can make it 9-t,
so basically we know that, if a digit t is <5, 9- t will be greater than t, so in that case we should not edit digits < 5
for digits >=5 , 9-digit will be less than the digit, so we should edit them to make 9-digit.
for example in the giveb string 4545,
for the first digit 4, if we make 9-4, it will become a greater number, coz 4 is less than 5, we don’t edit it,
we edit 5, and make it 4 which results in a smaller number, and so on. so resulant smallest number possible will be 4444.
Now in all this procedure keep in mind that, if 9 is at the first digit editing it and converting it into 0 will make the number start with 0, you don’t have to do that.

I hope I’ve cleared your doubt. I ask you to please rate your experience here
Your feedback is very important. It helps us improve our platform and hence provide you
the learning experience you deserve.

On the off chance, you still have some questions or not find the answers satisfactory, you may reopen
the doubt.

The doubt was reopened. Is your doubt resolved?

I hope I’ve cleared your doubt. I ask you to please rate your experience here
Your feedback is very important. It helps us improve our platform and hence provide you
the learning experience you deserve.

On the off chance, you still have some questions or not find the answers satisfactory, you may reopen
the doubt.