Longest Arithmetic Subsequence

#1

My code is failing some test cases can u help me to identify and help in correction of my code

problem https://leetcode.com/problems/longest-arithmetic-subsequence/
my code
https://ide.codingblocks.com/s/577537

#2

This is because same numbers are considered more than once. For example your code fails for [7,7,7]. I corrected it https://ide.codingblocks.com/s/577696, I keep track of numbers we have already seen for a particular nums[i]. Also I started iterating backwards because it’s easier to comprehend, I am not sure if fiiling the future numbers works correctly(it should I guess, am not sure). So for now you have the best answers until index i.

#3

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