Solution: Interval List Intersections
Explore how to solve the interval list intersection problem efficiently by iterating through two sorted lists. Understand the optimized approach that identifies overlapping intervals using two pointers, compares start and end times, and appends intersections. By the end, you will know how to implement a linear-time algorithm that handles interval intersections with constant extra space, preparing you for coding interview questions involving intervals.
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Statement
Given two lists of intervalListA and intervalListB, return the intersection of the two interval lists.
Each interval in the lists has its own start and end time and is represented as [start, end]. Specifically:
intervalListA[i] = [starti, endi]intervalListB[j] = [startj, endj]
The intersection of two closed intervals i and j is either:
An empty set, if they do not overlap, or
A closed interval
[max(starti, startj), min(endi, endj)]if they do overlap.
Also, each list of intervals is pairwise disjoint and in sorted order.
Constraints:
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