Sum of Mode | GFG POTD | GFG | Java & C++ code | 01-09-2025 скачать в хорошем качестве

Sum of Mode | GFG POTD | GFG | Java & C++ code | 01-09-2025

We are solving the Sum of Modes problem. Solution : https://github.com/Codefou01/GFG-POTD... A mode is the element that occurs most frequently in a subarray. If multiple elements have the same highest frequency, the larger element is considered the mode. We slide a window of size k across the array, find the mode for each window, and take the sum of all these modes. To efficiently solve this, we maintain: A HashMap to store frequencies of elements inside the current window. A TreeSet (Java) / set (C++) with a custom comparator to always fetch the mode in O(1) time while supporting insertions and deletions in O(log k). Time Complexity (TC) For each of the n elements, we do at most one insertion and one deletion in the balanced tree. Each operation takes O(log k). Therefore, Total TC = O(n log k) Space Complexity (SC) HashMap stores frequencies of up to k elements. TreeSet stores up to k elements. Therefore, Total SC = O(k) Don't forget to like, comment, and subscribe if this helped you! Share with your friends preparing for interviews😊 #coding #youtube #programming #dsa #gfg #leetcode #interview #technical #codinginterview #java #C++