/* 3. Longest Substring without Repeating Characters
 * O(n) time, O(1) space - two iterations
 */

public class Solution {

}

/* 3. Longest Substring without Repeating Characters
 * O(n) time, O(1) space - two iterations
 */

public class Solution {
  public int lengthOfLongestSubstring(String s) {
    
  }

}

update 3