leetcode
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grandyang
Provide all my solutions and explanations in Chinese for all the Leetcode coding problems.
A transformation sequence from word `beginWord` to word `endWord` using a dictionary `wordList` is a sequence of words `beginWord -> s1 -> s2 -> ... -> sk` such that: *...
Given a sorted array of integers _nums_ and integer values _a_ , _b_ and _c_. Apply a quadratic function of the form f( _x_ ) = _ax_ 2 + _bx_...
Given an integer array `nums`, return _the third distinct maximum number in this array. If the third maximum does not exist, return the maximum number_. Example 1: Input: nums =...
Given two strings _s_ and _t_ , determine if they are both one edit distance apart. Note: There are 3 possiblities to satisify one edit distance apart: 1. Insert a ...
Design and implement a data structure for [Least Recently Used (LRU) cache](https://en.wikipedia.org/wiki/Cache_replacement_policies#LRU). It should support the following operations: `get` and `put`. `get(key)` - Get the value (will always be positive)...
You are given a string `s` that consists of lower case English letters and brackets. Reverse the strings in each pair of matching parentheses, starting from the innermost one. Your...
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