leetcode-3. Longest Substring Without Repeating Characters
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https://leetcode.com/problems/longest-substring-without-repeating-characters/#/description
代码如下:
public class Solution { public int lengthOfLongestSubstring(String s) { Set<Character> set=new HashSet<>(); int max=0,j=0,i=0; while(j<s.length()) { if(!set.contains(s.charAt(j))) { set.add(s.charAt(j++)); // j++; max=Math.max(max,set.size()); }else { //j++; set.remove(s.charAt(i++)); } } return max; }}
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