As you can see from the illustration above, the memoization method gets rid of the redundant part of the problem and we just have to calculate and store the left part of our call tree. Hope you guys like the illustration I drew! Since we just have to calculate the leftmost branch of the tree to compute the sequence, our complexity becomes only O(n)! Much better eh?

## Saturday, 22 March 2014

### Complexity and O(n) Notation

As you can see from the illustration above, the memoization method gets rid of the redundant part of the problem and we just have to calculate and store the left part of our call tree. Hope you guys like the illustration I drew! Since we just have to calculate the leftmost branch of the tree to compute the sequence, our complexity becomes only O(n)! Much better eh?

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