Search⌘ K
AI Features
Home
Courses
Grokking the Coding Interview Patterns in C#

Number of Ways to Form Target String Given a Dictionary

Explore how to use dynamic programming to calculate the number of ways to form a target string from a list of words where character positions restrict future choices. Understand problem constraints, rules for character selection, and implement a solution that handles large outputs with modulo operations.

We'll cover the following...

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) ...