26. Merge Intervals || Merge Overlapping Subintervals || Top 150+ DSA Leetcode Coding JAVA

Given an array of intervals where intervals[i] = [start i, end i], merge all overlapping intervals, and return an array of the non-overlapping intervals that cover all the intervals in the input.
Approach-
Sort the array on start times.
Travers on this sorted array and compare the start of current pair with end of previous pair which is part of your output array and is the last element of it.
if 'start' is less than equal to 'end' then it is overlap and merge it with the last element of output array. Else add this current (start, end) pair in your output array.
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