摘要：
There are N gas stations along a circular route, where the amount of gas at station i is gas[i]. You have a car with an unlimited gas tank and it cost... 阅读全文
摘要：
Given two numbers represented as strings, return multiplication of the numbers as a string. Note: The numbers can be arbitrarily large and are non-neg... 阅读全文
摘要：
Implement strStr(). Returns a pointer to the first occurrence of needle in haystack, or null if needle is not part of haystack. Solution: Brute force ... 阅读全文
摘要：
Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 1000, and there exists one unique longe... 阅读全文