LeetCode Longest Substring Without Repeating Characters
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https://oj.leetcode.com/problems/longest-substring-without-repeating-characters/
public int lengthOfLongestSubstring(String s) { int max = 0; HashMap<Character, Integer> map = new HashMap<Character, Integer>(); int start = 0; int i = 0; for(; i < s.length(); i++){ if(map.containsKey(s.charAt(i))){ max = Math.max(max, i - start); start = Math.max(start, map.get(s.charAt(i)) + 1); } map.put(s.charAt(i), i); } max = Math.max(max, i - start); return max;}
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