摘要：``` public int lengthOfLongestSubstring(String s) { int max = 1; int start = 0; int end = 1; int len = s.length(); if(len == 0) return 0; ... 阅读全文

摘要：``` public ListNode addTwoNumbers(ListNode l1, ListNode l2) { if(l1 == null) return l2; if(l2 == null) return l1; ListNode head = new ListNode(0); ListNod... 阅读全文

摘要：``` public int[] twoSum(int[] nums, int target) { HashMap map = new HashMap(); int[] defaultResult = {0,0}; int len = nums.length; for(int i = 0;i 阅读全文