Greedy Algorithms/Partition LabelsMedium

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Partition Labels

Greedy Algorithms·Medium

You are given a string s. We want to partition the string into as many parts as possible so that each letter appears in at most one part.

Note that the partition is done so that after concatenating all the parts in order, the resultant string should be s.

Return a list of integers representing the size of these parts.

Examples

Input: s = "ababcbacadefegdehijhklij"

Output: [9,7,8]

The partition is "ababcbaca", "defegde", "hijhklij". This is a partition so that each letter appears in at most one part. A partition like "ababcbacadefegde", "hijhklij" is incorrect, because it splits s into less parts.

Input: s = "eccbbbbdec"

Output: [10]

All characters span the full string so it forms one partition.

Constraints

1 <= s.length <= 500
s consists of lowercase English letters.

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Tests

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Passed32 ms

First attempt — retry to track metric movement here.

Your approach

Pattern:Greedy Algorithms
Time:O(N)
Space:O(1)

Complete approach — pattern and complexity both named.

Coach

What you got right

You correctly matched the sorted input requirement and implemented a linear-time scan using two pointers.

Where it diverged

No divergence detected. The code correctly aligns with the stated approach.

Next attempt: focus on

Try solving related sliding window problems to build familiarity with two-pointer variants.

Signals

No signals fired — clean run, you stayed in flow.