Heap
Merge K Sorted Lists
Given k sorted lists of numbers, merge them into one sorted list.
Input: [[1, 3, 5], [2, 4, 6], [7, 10]]
Output: [1, 2, 3, 4, 5, 6, 7, 10]
Try it yourself
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>>> a = [1, 2, 3]
>>> a[-1]
3