Merge overlapping intervals by sorting and merging overlapping ranges. Learn three approaches: naive O(n²) time, optimized O(nlog(n)) space-efficient merging, and in-place O(nlog(n)) method. Each approach demonstrates merging intervals like [[1, 5], [2, 4], [4, 6]] into [[1, 6]]. Examples and Java implementations included for clear understanding.
For more details, visit the GeeksforGeeks article: Merge Overlapping Intervals.