floatp的专栏

Uber:Given an array of integers, return a new array such that each element at index i of the new array is the product of all the numbers in the original array except the one at i.For example, ...

Google:这是谷歌很经典的一道题，在数组中寻找两个数，它们的和是否为k.基本上所有的算法题，都有一个暴力解。我们就先从暴力解法开始。注意：笔者会尽量使用新的C++语法来描述算法，而不是类C的代码风格。

Google:Given the root to a binary tree, implement serialize(root),which serialize the tree into a string, and deserialize(s), which deserialize the string back into the tree.For example, given...

Stripe:Given an array of integers, find the first missing positive integer in linear time and constant space. In other words, find the lowest positive integer that does not exist in the array. The ...

Google:An XOR linked list is a more memory efficient doubly linked list. Instead of each node holding next and prev fields, it holds a field named both, which is an XOR of the next node and the pre...