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Find Sum of Array Product of Magical Sequences

hard Solve on LeetCode

Problem
Examples
Example 1
Example 2
Example 3
Constraints
Solution
Method 1 - Naive brute-force enumeration (explanatory, no code)
Intuition
Approach
Complexity
Method 2 - Memoized DP (carry-by-binary-digit + combinatorics)
Intuition
Approach
State Definition
Recurrence Relation
Code
Complexity
Method 3 - Bottom-up DP (iterative 4D DP)
Intuition
Approach
Code
Complexity

Related Tags

bit-manipulation bitmask combinatorics dynamic-programming leetcode math

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