Longest Substring Without Repeating Characters - Practice Coding | SlaveCode
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3. Longest Substring Without Repeating Characters
Medium
30 Points
Hash Table
String
Sliding Window
Given a string s, find the length of the longest substring without duplicate characters.
Examples
Example 1
Input: s = "abcabcbb"
Output: 3
Explanation: The answer is "abc", with the length of 3.
Example 2
Input: s = "bbbbb"
Output: 1
Explanation: The answer is "b", with the length of 1.
Example 3
Input: s = "pwwkew"
Output: 3
Explanation: The answer is "wke", with the length of 3.
Notice that the answer must be a substring, "pwke" is a subsequence and not a substring.
Constraints
0 <= s.length <= 5 * 104
s consists of English letters, digits, symbols and spaces.
3. Longest Substring Without Repeating Characters
Medium
30 Points
Hash Table
String
Sliding Window
Given a string s, find the length of the longest substring without duplicate characters.
Examples
Example 1
Input: s = "abcabcbb"
Output: 3
Explanation: The answer is "abc", with the length of 3.
Example 2
Input: s = "bbbbb"
Output: 1
Explanation: The answer is "b", with the length of 1.
Example 3
Input: s = "pwwkew"
Output: 3
Explanation: The answer is "wke", with the length of 3.
Notice that the answer must be a substring, "pwke" is a subsequence and not a substring.
Constraints
0 <= s.length <= 5 * 104
s consists of English letters, digits, symbols and spaces.