摘要:
题目描述: Given two non-negative integers num1 and num2 represented as string, return the sum ofnum1 and num2. 注意事项 The length of both num1 and num2 is < 阅读全文
摘要:
题目描述: Given a non-empty string check if it can be constructed by taking a substring of it and appending multiple copies of the substring together. You 阅读全文