Unique Number of Occurrences | Two Approaches | Leetcode 1207

Whatsapp Community Link : https://www.whatsapp.com/channel/0029... This is the 2nd Video of our Playlist "Hash Map/Set : Popular Interview Problems". In this video we will try to solve a good practice problem - Unique Number of Occurrences (Leetcode - 1207) I will explain the intuition so easily that you will never forget and start seeing this as cakewalk EASYYY. We will do live coding after explanation and see if we are able to pass all the test cases. Also, please note that my Github solution link below contains both C++ as well as JAVA code. Problem Name : Unique Number of Occurrences Company Tags : Google, Twitter, Amazon, Netflix My solutions on Github(C++ & JAVA) : https://github.com/MAZHARMIK/Intervie... Leetcode Link : https://leetcode.com/problems/unique-... My DP Concepts Playlist :    • Roadmap for DP | How to Start DP ? | Topic...   My Graph Concepts Playlist :    • Graph Concepts & Qns - 1 : Graph will no m...   My GitHub Repo for interview preparation : https://github.com/MAZHARMIK/Intervie... Subscribe to my channel :    / @codestorywithmik   Instagram :   / codestorywithmik   Facebook :   / 100090524295846   Twitter :   / cswithmik   Approach-1 Summary : The function first creates an unordered_map mp to store the frequency of each number in the input vector. It then iterates through the vector, updating the frequency count in the map. Next, the function uses an unordered_set st to keep track of unique occurrence frequencies. It iterates through the entries in the frequency map and checks if the current frequency is already present in the set. If it is, the function returns false, indicating that there are duplicate occurrence frequencies. Otherwise, it adds the frequency to the set. Finally, if the function completes the iteration without finding any duplicate occurrence frequencies, it returns true, indicating that all unique numbers have distinct occurrences in the input vector. Approach-2 Summary : In this approach, The algorithm uses an auxiliary vector vec of size 2001 to store the count of occurrences for each element. It shifts the indices by 1000 to handle negative numbers. After counting occurrences, the vector is sorted. Finally, the function checks if any adjacent elements in the sorted vector have the same count, and if so, it returns false. If no such pair is found, it returns true, indicating that the occurrences of each unique element are indeed distinct. ╔═╦╗╔╦╗╔═╦═╦╦╦╦╗╔═╗ ║╚╣║║║╚╣╚╣╔╣╔╣║╚╣═╣ ╠╗║╚╝║║╠╗║╚╣║║║║║═╣ ╚═╩══╩═╩═╩═╩╝╚╩═╩═╝ ✨ Timelines✨ 00:00 - Introduction #coding #helpajobseeker #easyrecipes #leetcode #leetcodequestionandanswers #leetcodesolution #leetcodedailychallenge #leetcodequestions #leetcodechallenge #hindi #india #coding #helpajobseeker #easyrecipes #leetcode #leetcodequestionandanswers #leetcodesolution #leetcodedailychallenge#leetcodequestions #leetcodechallenge #hindi #india #hindiexplanation #hindiexplained #easyexplaination #interview#interviewtips #interviewpreparation #interview_ds_algo #hinglish #github #design #data #google #video #instagram #facebook #leetcode #computerscience #leetcodesolutions #leetcodequestionandanswers #code #learning #dsalgo #dsa #2024 #newyear