WA in CHANDF

help
1

https://www.codechef.com/viewsolution/33075263

Can someone please help me out to find out the problem in this question of may long challenge 2020.
I am unable to identify the missing edge case since many days

2

I could only find one mistake:

if(x==0 or y==0):
            print(0)

if x or y is equal to 0, you are printing 0. but what if L>0
You need to print L instead in this case because 0 is not always within the range of L and R

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3

Thank you very much.
I totally missed out that thing,
But still, there is something else also that I am missing, because still the verdict remains WA

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4

Iā€™m sorry but I myself was unable to solve subtask 2 and 3 of this question.
You should take a look at the EDITORIAL

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