I am getting correct output still it is showing that my answer is wrong. What should I do?

[kau2187]

Problem Link:

RECNDSTR Problem - CodeChef

My Solution Link:
https://www.codechef.com/viewsolution/32826020

[sebastian]

See when you are storing list2. You will know your error, try printing list2 and check what it stored

[krishna_kc]

just a minute late.

for j in range(1,l):
        list1[j-1] = list1[j]
    list1[l-1] = first

    for k in range(l-1):
        list2[k] = list2[k+1]
    list2[0] = last

both the loops do the similar(small differences) thing thats where you are going wrong.
change one of them so that the iterator is decreasing. hope it will work