LeetCode 1684 | Count the Number of Consistent Strings | Python Set or Bitmask | AlgoYogi

Welcome to AlgoYogi! 🚀 Start Your Smart Coding Prep at 👉 https://algoyogi.io We solve LeetCode 1684: Count the Number of Consistent Strings using two clean Python ideas: 1) Set method: build a set of allowed letters and check every word contains only those letters. 2) Bitmask method: turn allowed letters into a 26-bit mask and verify each word’s mask is a subset. 👉 Problem Link: https://leetcode.com/problems/count-the-number-of-consistent-strings/description/ --- ### ⏱ Timestamps 0:00 Introduction 0:20 Problem Statement 1:00 Set Method 6:30 Python Code Walkthrough 8:00 Time and Space Complexity --- ### 💡 Why Watch? - Learn a simple set containment check for strings - See a fast bit trick with a 26-bit mask for speed - Interview friendly patterns with linear time solutions #LeetCode #ConsistentStrings #Python #AlgoYogi #HashSet #Bitmask