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Grokking the Coding Interview Patterns in Go

Number of Ways to Form Target String Given a Dictionary

Explore how to use dynamic programming techniques to determine the number of ways to form a target string from given dictionary words. Understand the constraints of selecting characters from the words and apply memoization strategies to efficiently solve this problem from left to right.

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Statement

You are given a list of nn strings, words, where each string has the same length mm, and a target string, target, of length tt. A target can be formed using the given words under the following rules:

  • You must build the target from left to right.

  • To form the ith character (0-indexed) ...