Solution: Partition Labels
Explore how to efficiently partition a string so that each letter appears in at most one part. This lesson demonstrates using a two pointer approach with a map of last character occurrences to identify the boundaries for valid partitions and compute their sizes. You will learn to implement this linear time and constant space solution for the Partition Labels problem.
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Statement
You are given a string s. Your task is to divide the string into as many parts as possible such that each letter appears in at most one part.
In other words, no character should occur in more than one partition. After concatenating all parts in order, the result should be the original string s.
For example, given s = "bcbcdd", a valid partition is ["bcbc", "dd"]. However, partitions like ["bcb", "cdd"] or ["bc", "bc", "dd"] are invalid because some letters appear in multiple parts.
Return a list of integers representing the sizes of these partitions.
Constraints:
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