757. Set Intersection Size At Least Two | Leetcode Daily - Python
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In this video, we tackle LeetCode 757 "Set Intersection Size At Least Two", a challenging Hard problem involving interval scheduling and greedy algorithms. The goal is to find the smallest set of numbers such that every input interval contains at least two numbers from our set.
We break down the optimal greedy strategy: sorting the intervals based on start and end times, and then processing them backwards. By checking the "todo" requirements for each interval, we can greedily select points that maximize overlap with earlier intervals, keeping the total set size to a minimum. This tutorial walks through the logic step-by-step, explains the specific sorting criteria needed to handle sub-intervals, and analyzes the O(N^2) time complexity.
The main explanation uses Python, but full solution code is provided for Java, C++, and JavaScript as well.
Perfect for coding interview preparation and improving problem-solving skills.
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Solution Link:
https://leetcode.com/problems/set-int...
#leetcode #python #algorithms #codinginterview #dailycoding
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