Problems facing energy site development

Remove Element

The problem statement clearly asks us to modify the array in-place and it also says that the element beyond the new length of the array can be anything. Given an element, we need to

2024 Mar 19

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Min Stack

Can you solve this real interview question? Min Stack - Design a stack that supports push, pop, top, and retrieving the minimum element in constant time. Implement the MinStack class: *

2025 Dec 26

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Combinations

Can you solve this real interview question? Combinations - Given two integers n and k, return all possible combinations of k numbers chosen from the range [1, n]. You may return the answer

2024 Sep 20

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Top 100 Liked

100 Best Rated Problems Top 100 Liked Summary 100 most liked problems by LeetCoders. Organized based on hot topics that help improve coding skills in interviews.

2025 Feb 10

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Top Interview 150

Top Interview 150 Summary 150 Original & Classic Questions Covers comprehensive interview topics Best for 3+ months of prep time Problems support high-quality editorials

2026 Jan 29

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Spiral Matrix

Well for some problems, the best way really is to come up with some algorithms for simulation. Basically, you need to simulate what the problem asks us to do.

2025 Jan 11

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Assign Cookies

Can you solve this real interview question? Assign Cookies - Assume you are an awesome parent and want to give your children some cookies. But, you should give each child at most one

2025 Mar 23

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Lexicographical Numbers

Can you solve this real interview question? Lexicographical Numbers - Given an integer n, return all the numbers in the range [1, n] sorted in lexicographical order. You must write an algorithm

2024 Aug 29

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01 Matrix

Given an m x n binary matrix mat, return the distance of the nearest 0 for each cell. The distance between two cells sharing a common edge is 1. Example 1: Input: mat = [[0,0,0],[0,1,0],[0,0,0]]

2025 Apr 26

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