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We now support 14 popular coding languages. At our core, LeetCode is about developers. Our powerful development tools such as Playground help you test, debug and even write your own projects online.
Boost your coding interview skills and confidence by practicing real interview questions with LeetCode. Our platform offers a range of essential problems for practice, as well as the latest questions being asked by top-tier companies.
LeetCode Explore is the best place for everyone to start practicing and learning on LeetCode. No matter if you are a beginner or a master, there are always new topics waiting for you to explore.
暴力做法每次拿两个数出来相加，和 target\textit {target}target 比较，那么花费 O (1)\mathcal {O} (1)O (1) 的时间，只获取了 O (1)\mathcal {O} (1)O (1) 的信息。. 而哈希表做法，每次查. 解题思路： 题目：给定一个整数数组 nums 和一个目标值 target，请你在该数组中找出和为 ...
Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview.
LeetCode is an online platform for coding interview preparation. The service provides coding and algorithmic problems intended for users to practice coding. LeetCode has gained popularity among job seekers and coding enthusiasts as a resource for technical interviews and coding competitions.
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