1684. Count the Number of Consistent Strings | Hash Table | Leetcode Daily Challenge | JAVA

In this video, we will solve LeetCode problem number 1684, titled "Count the Number of Consistent Strings." This problem is categorized as Easy difficulty and involves counting how many strings in a given array consist only of characters from an "allowed" string. The challenge is to efficiently check each string in the array against the allowed characters.

We will start by explaining the problem statement, which asks us to determine how many strings in the input array are "consistent," meaning they contain only characters present in the allowed string. The solution uses a boolean array to track which characters are allowed, and then iterates through the list of words, decrementing the count when a word contains any disallowed character.

By the end of this tutorial, you'll understand how to approach problems involving character validation and optimize the search using arrays.

🕒 Timestamps:

0:00 Introduction
0:20 Problem Statement
1:06 Solution Approach
3:18 Code Walkthrough
8:20 Final Thoughts

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