subsequence frequency counting editorial required

Правка en1, от shivamSha_123, 2020-08-19 13:05:10

Can someone provide the editorial for the following problem link which came in August long challenge 2020?

https://www.codechef.com/AUG20B/problems/SUBSFREQ/

How to solve this problem?

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en1 Английский shivamSha_123 2020-08-19 13:05:10 239 Initial revision (published)