Question
Given a linked list, remove the nth node from the end of list and return its head.
For example,
Given linked list: 1->2->3->4->5, and n = 2.
After removing the second node from the end, the linked list becomes 1->2->3->5.
Note:
Given n will always be valid.
Try to do this in one pass.
解说
这道题的意思是，如何反向删继续阅读 »
Question
Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also known as the Hamming weight).
For example, the 32-bit integer ’11' has binary representation 00000000000000000000000000001011, so the function should return 3.
解说
这道题的意思是统计32位整数二进制格式下的‘1’的个数。
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Solution
rig继续阅读 »
Question
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.
Example:
Given nums = [2, 7, 11, 15], target = 9,
Because nums[0] + nums[1] = 2 + 7 = 9,
return [0, 1].
UPDATE (2016/2/13):
The return forma继续阅读 »
什么是Check
Check是C语言的一个单元测试框架。它提供一个小巧的单元测试接口。测试案例运行在各自独立的地址空间，所以断言失败和代码错误造成的段错误或者其他的信号可以被捕捉到。另外，测试的结果显示也兼容以下这些格式：Subunit、TAP、XML和通用的日志格式。
Check is a unit testing framework for C. It features a simple interface for defining unit tests, putting little in the way of the developer. Tests are run in a separate address space继续阅读 »