Thank you so much sir,

I understood the mistake and your post was very helpful as well.

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Thank you so much sir,

I understood the mistake and your post was very helpful as well.

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Thanks sir for your reply.

I tried solving it but i keep getting WA for 4 different test cases(5 11 12 15)

I am not able to figure out which corner case i have missed.

The approach i have used is:

1)Sort both shelves in desc order

2)Compare all elements from the 0th index of the two shelves and find the first index where a shelf has an element greater than the other.

3)Keep two flags: flag2 for the shelf with highest element and flag for the other shelf.

4)Then I swap the last element of flag2 shelf with the first of flag shelf if it is greater .

5)Then i sort the flag shelf and skew is the sum of first elements of both shelves.

It fails for subtask 5 as well for which k=1.

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I have 2 confusions in the problem.

1)Do we have to make exactly k swaps or at max k swaps?

2)If we swap one book from shelf 1 to shelf 2 can we swap that book again back to shelf 1 with some other book?

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