题目描述：
A magical string S consists of only '1' and '2' and obeys the following rules:
The string S is magical because concatenating the number of contiguous occurrences of characters '1' and '2' generates the string ...
[LeetCode]Magical String
[LeetCode]Number Complement
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LeetCode.
题目描述：
LeetCode 476. Number Complement
Given a positive integer, output its complement number. The complement strategy is to flip the bits of its binary representation.
Note:
- The given integer is guaranteed to fit within the range of a 32-bit signed ...
[LeetCode]Largest Palindrome Product
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LeetCode.
题目描述：
LeetCode 479. Largest Palindrome Product
Find the largest palindrome made from the product of two n-digit numbers.
Since the result could be very large, you should return the largest palindrome mod 1337.
Example:
Input: 2
Output: 987
Explanation: 99 ...
Python Requests实现短网址还原
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Python.
利用python-requests（http://www.python-requests.org/），只需数行代码即可实现短网址还原。
通过HTTP HEAD请求，从返回响应的头信息（headers）中取出Location字段即为短网址对应的原始网址。
Python代码：
import requests
def revertShortLink(url):
res = requests.head(url)
return res.headers.get('location')
代码测试：
print revertShortLink('http://t.cn/RVMAn7W')
返回结果：
http://bookshadow.com/weblog/2016/10 ...
LeetCode Weekly Contest 13解题报告
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LeetCode.
LeetCode Weekly Contest 13是LeetCode举办的第十六场正式周赛，共4道题目，比赛时长2小时。
比赛链接：https://leetcode.com/contest/leetcode-weekly-contest-13/
题解列表：
LeetCode 461. Hamming Distance
LeetCode 477. Total Hamming Distance