Given a collection of intervals, merge all overlapping intervals.
For example, Given [1,3],[2,6],[8,10],[15,18], return [1,6],[8,10],[15,18].
SPOILER ALERT: http://www.geeksforgeeks.org/merging-intervals/
Given a collection of intervals, merge all overlapping intervals.
For example, Given [1,3],[2,6],[8,10],[15,18], return [1,6],[8,10],[15,18].
SPOILER ALERT: http://www.geeksforgeeks.org/merging-intervals/