LeetCode 75 C++ | Step-by-Step Solutions (LAN Academy) - Unique Number of Occurrences | LeetCode 1207 in C++

Can every number in an array have a unique frequency? In this video, we solve LeetCode 1207 – Unique Number of Occurrences using a clean and efficient hash map + set approach in C++. What you’ll learn — How to count frequencies with unordered_map — How to verify uniqueness with unordered_set — A simple and intuitive solution in O(n) time Time complexity: O(n) Space complexity: O(n) Timestamps 0:00 – Problem explanation 0:25 – Counting with hash maps 0:50 – Ensuring uniqueness with sets 1:45 – C++ implementation 2:40 – Dry run and examples 3:20 – Edge cases and conclusion Full LeetCode 75 Series (C++ explained): https://lanacademy-school.thinkific.com/courses/leetcode75 Problem: https://leetcode.com/problems/unique-number-of-occurrences/ Follow LAN Academy 🌐 Website: https://lanacademy-school.thinkific.com 📺 YouTube: @lanacademy9521 🐦 Twitter: https://x.com/SolutionsLan #LeetCode #CPlusPlus #HashMap #Set #DSA #Algorithms #CodingInterview #LANAcademy #InterviewPrep @reper #foryou #viral #reper #urmaritori #for