LeetCode 49. Group AnagramsLeetCode-49 Given an array of strings strs, group the anagrams together. You can return the a

LeetCode 41. First Missing PositiveLeetCode-41 Given an unsorted integer array nums, return the smallest missing positiv

LeetCode 33. Search in Rotated Sorted ArrayLeetCode-33 There is an integer array nums sorted in ascending order (with di

LeetCode 32. Longest Valid ParenthesesLeetCode-32 Given a string containing just the characters ( and ), find the length

LeetCode 31. Next PermutationA permutation of an array of integers is an arrangement of its members into a sequence or l

LeetCode 28. Implement strStr()Return the index of the first occurrence of needle in haystack, or -1 if needle is not pa

LeetCode 22. Generate ParenthesesLeetCode-22 Given n pairs of parentheses, write a function to generate all combinations

LeetCode 19. Remove Nth Node From End of ListGiven the head of a linked list, remove the n^th^ node from the end of the

LeetCode 10. Regular Expression MatchingLeetCode-10 Given an input string s and a pattern p, implement regular expressio

LeetCode 5. Longest Palindromic SubstringLeetCode-5 Given a string s, return the longest palindromic substring in s. Exa

LeetCode 3. Longest Substring Without Repeating CharactersLeetCode-3 Given a string s, find the length of the longest su

19.1.1 重载new和deletestring *sp = new string("a value"); string *arr = new string[10]; 一条new表达式，实际执行了三步操作 new表达式调用一个名为ope