Solution: N-th Tribonacci Number

Explore how to calculate the N-th Tribonacci number by applying dynamic programming techniques. Understand how to optimize the recursive approach to reduce time complexity to O(n) and space complexity to O(1). This lesson helps you implement an efficient solution suited for coding interviews using constant space optimization.

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Statement
Solution
- Naive approach
- Optimized approach using dynamic programming

Statement

Given a number n, calculate the corresponding Tribonacci number. The Tribonacci sequence $T_n$ is defined as:

$T_0 = 0,\space T_1 = 1,\space T_2 = 1$

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