面试场景
高频考察问题建模、边界条件与口头表达的清晰度。
常见误区
只背模板不解释为什么，容易在追问里失分。
练习策略
每轮练 3-5 题，固定复盘复杂度和可替代解法。
推荐练习顺序
最大间距
Find the largest difference between successive elements in a sorted array efficiently using linear time techniques and b…
存在重复元素 III
The problem involves finding a pair of indices in an array where the index and value differences are within given limits…
前 K 个高频元素
Find the k most frequent elements from an array using efficient algorithms like hashing and sorting.
根据字符出现频率排序
Sort Characters By Frequency requires counting characters efficiently and rearranging a string in descending frequency o…
前K个高频单词
Solve Top K Frequent Words by counting each word, then ordering ties alphabetically so frequency wins before lexicograph…
排序数组
Sort an array using an optimal algorithm, focusing on time and space complexity considerations.