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Problem: Longest Substring Without Repeating Characters

Explore how to determine the length of the longest substring without repeating characters in a string. Learn to apply the sliding window technique combined with a hash map in Java to efficiently track character positions, enabling a single-pass solution that handles diverse character sets.

Statement

Given a string s, determine the length of the longest substring that contains no repeating characters.

A substring is a contiguous sequence of characters within a string.

Note: There may be multiple valid substrings of the same maximum length. Return only the length.

Constraints:

  • 00 \leq s.length 5×104\leq 5 \times 10^4

  • s consists of English letters, ...