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 Oct 04

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

2025 Apr 20

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

2025 Oct 10

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 Apr 18

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.

2024 Feb 12

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 May 26

Linked List

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.

2025 Mar 13

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]]

2026 Jan 03

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

2025 Nov 03

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 02

View/Download Problems with solar energy storage cabinet systems [PDF]

PDF version includes complete article with source references. Suitable for printing and offline reading.