I have been into competitive coding for the last 5 years and this is what I learned If you want to crack good coding interviews you need to be very good at problem-solving.
The key to these interviews is not just solving the problem but give the optimized solution which takes very less time constraint.
One of the classic problems people don't know the idea for an O(1) solution is RangeSumQueries.
Problem Statement:
- Given an array of N Elements.
- Multiple queries will be asked with inputs L, R where 0 <= L < R < N
The user has to provide the Sum of elements in this range.
Note: Don't fall for a naive brute force approach it will take a lot of time with increasing array size and multiple queries.
Watch the video on my channel to find the solution using the auxialiary array.
YouTube:
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