cdaning的博客

1. Two Sum要求： Given an array of integers, return indices of the two numbers such that they add up to a specific target。 You may assume that each input would have exactly one solution, and you may no

2 Add Two Numbers要求： You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the tw

3 Longest Substring Without Repeating Characters要求： Given a string, find the length of the longest substring without repeating characters. Examples: Given “abcabcbb”, the answer is “abc”, which the

""" 012345678910...序列中，第n位数"""def solution(n): if n < 0: return -1 if n < 10: return n i = 2 # 确定是第几位数 sums = 10 ret = 0 while True: # 一位...