Leetcode Problem 436. Find Right Interval

436. Find Right Interval

Leetcode Solutions

Create a TreeMap starts to store intervals' start points as keys and their indices as values.
Iterate over the input intervals and populate the TreeMap with the start point and index of each interval.
Create an array result to store the indices of the right intervals.
For each interval in intervals, use the TreeMap's ceilingEntry method to find the least key greater than or equal to the interval's end point.
If ceilingEntry returns a non-null value, store the corresponding index in result. Otherwise, store -1 to indicate no right interval exists.
Return the result array.

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