Unique state in DP

Please explain how to identify unique state in DP? is there any good resource I can refer from

@sahazeer123 To identify the dp states, one need to practice a lot and with time you will get it.
You can try solving a number of DP problem from the Dp contests on hackerblocks. https://hack.codingblocks.com/app/contests/1043/
Or you can solve leetcode DP questions.

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