GDSUB - Chef and Good Subsequences

Can anyone explain the approach for GDSUB from September Long Challenge?

Problem Link: https://www.codechef.com/SEPT19B/problems/GDSUB

Here’s mine:

GDSUB - “Chef and Good Subsequences” - documented code; Editorial-style overview.

There’s also an Unofficial Editorial, which is interesting :slight_smile:

May as well dump the others here, though the Editorial code is surprisingly readable this time - hats off to @neverwannafly :slight_smile:

FIBEASY - “Easy Fibonacci” - documented code; Editorial-style overview.

CHEFINSQ - “Chef and Interesting Subsequences” - documented code; Editorial-style overview.

CHEFK1 - “Chef Designed a Network” - documented code; 95%-complete Editorial-style overview (will finish later today :)).

LAPD - “Biladerim Icin” - documented code; sketch-outline of Editorial-style overview (will finish later today :)).

FUZZYLIN - “Fuzzy Linear Combinations” - documented code; sketch-outline of Editorial-style (will finish later today :)).

NB: all are un-proofread - please point out any mistakes you find :slight_smile:

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