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.

Not only does LeetCode prepare candidates for technical interviews, we also help companies identify top technical talent. From sponsoring contests to providing online assessments and training, we offer …

1. Please don't post any solutions in this discussion. 2. The problem discussion is for asking questions about the problem or for sharing tips - anything except for solutions. 3. If you'd like to share your …

Copyright © 2026 LeetCode Help Center Jobs Bug Bounty Assessment Students Terms Privacy Policy United States

1. Please don't post any solutions in this discussion. 2. The problem discussion is for asking questions about the problem or for sharing tips - anything except for solutions. 3. If you'd like to share your …

1. Please don't post any solutions in this discussion. 2. The problem discussion is for asking questions about the problem or for sharing tips - anything except for solutions. 3. If you'd like to share your …

Example 1: Input: x = 121 Output: true Explanation: 121 reads as 121 from left to right and from right to left. Example 2: Input: x = -121 Output: false Explanation: From left to right, it reads -121. From right …

Example 1: Input: s = "aa", p = "a" Output: false Explanation: "a" does not match the entire string "aa". Example 2: Input: s = "aa", p = "a*" Output: true Explanation: '*' means zero or more of the preceding …

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.

So, we essentially need to find three numbers x, y, and z such that they add up to the given value. If we fix one of the numbers say x, we are left with the two-sum problem at hand!