12-整数转罗马数字(Integer to Roman) 原文链接: https://leetcode-cn.com/problems/integer-to-roman 英文原文Roman numerals are represented by seven different symbols: 2021-12-03 哈希表字符串数学 中等
13-罗马数字转整数(Roman to Integer) 原文链接: https://leetcode-cn.com/problems/roman-to-integer 英文原文Roman numerals are represented by seven different symbols: 2021-12-03 哈希表字符串数学 简单
15-三数之和(3Sum) 原文链接: https://leetcode-cn.com/problems/3sum 英文原文Given an integer array nums, return all the triplets [nums[i], nums[j] 2021-12-03 双指针排序数组 中等
14-最长公共前缀(Longest Common Prefix) 原文链接: https://leetcode-cn.com/problems/longest-common-prefix 英文原文Write a function to find the longest common prefix st 2021-12-03 字符串 简单
17-电话号码的字母组合(Letter Combinations of a Phone Number) 原文链接: https://leetcode-cn.com/problems/letter-combinations-of-a-phone-number 英文原文Given a string containing digits from 2021-12-03 哈希表回溯字符串 中等
18-四数之和(4Sum) 原文链接: https://leetcode-cn.com/problems/4sum 英文原文Given an array nums of n integers, return an array of all the unique q 2021-12-03 双指针排序数组 中等
19-删除链表的倒数第 N 个结点(Remove Nth Node From End of List) 原文链接: https://leetcode-cn.com/problems/remove-nth-node-from-end-of-list 英文原文Given the head of a linked list, remove th 2021-12-03 双指针链表 中等
20-有效的括号(Valid Parentheses) 原文链接: https://leetcode-cn.com/problems/valid-parentheses 英文原文Given a string s containing just the characters '( 2021-12-03 字符串栈 简单
21-合并两个有序链表(Merge Two Sorted Lists) 原文链接: https://leetcode-cn.com/problems/merge-two-sorted-lists 英文原文You are given the heads of two sorted linked lists l 2021-12-03 递归链表 简单
22-括号生成(Generate Parentheses) 原文链接: https://leetcode-cn.com/problems/generate-parentheses 英文原文Given n pairs of parentheses, write a function to gene 2021-12-03 动态规划回溯字符串 中等