Leetcode 763: Partition Labels

grid47
grid47
Exploring patterns and algorithms
Aug 22, 2024 6 min read

A string where partitions are made, each partition softly glowing as it is formed.
Solution to LeetCode 763: Partition Labels Problem

You are given a string s. Your task is to divide the string into the maximum number of parts such that each letter appears in at most one part. The resulting parts, when concatenated in order, should form the original string.
Problem
Approach
Steps
Complexity
Input: The input consists of a string s.
Example: Input: s = "abcacbadefgh"
Constraints:
• 1 <= s.length <= 500
• s consists of lowercase English letters.
Output: Return a list of integers where each integer represents the length of one part after dividing the string.
Example: Output: [6, 7]
Constraints:
• The result list should contain the maximum number of partitions possible.
Goal: The goal is to divide the string into the maximum number of parts such that each letter appears in only one part.
Steps:
• First, find the last occurrence of each character in the string.
• Then, iterate over the string, keeping track of the rightmost position where the current partition can end.
• If the current position is equal to the last occurrence of any character in the current partition, finalize the current partition and start a new one.
Goal: The length of the string s is constrained between 1 and 500.
Steps:
• The string consists only of lowercase English letters.
Assumptions:
• The string is non-empty and contains only lowercase letters.
Input: Example 1: Input: s = "abcacbadefgh"
Explanation: In this example, the string is divided into two parts: "abcacb" and "adefgh", with no characters repeating across the parts.

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