RadwaKamal/longest-substring.md

Created March 30, 2026 11:08

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Longest Substring Without Repeating Characters

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Longest Substring Without Repeating Characters

Given a string s, find the length of the longest substring without repeating characters.

Examples

"abcabcbb"  → 3  ("abc")
"bbbbb"     → 1  ("b")
"pwwkew"    → 3  ("wke")
""          → 0
" "         → 1
"au"        → 2

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