LeetCode 349: Intersection of Two Arrays - Interview Prep Ep 49
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LeetCode 349. Intersection of Two Arrays: https://leetcode.com/problems/interse...
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Solutions explained:
Solution 1. We could use two hash sets, one for each array, then do intersection on both sets;
Slight modification: use the second set to hold all intersection elements rather than all distinct elements in the second array;
Solution 2. We can sort one of the two arrays, then use binary search to find intersection elements;
Solution 3. We can sort both arrays, then use two pointers to iterate through both of the sorted arrays.
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