SWE Prep
Subscribe
Sign in
About
Archive
Help
Sign in
Archive
Top
About
Count Largest Group
Lessons Learned: HashMaps
Sameer Khoja
Apr 23, 2021
Share
Share this post
Count Largest Group
sweprep.substack.com
Copy link
Twitter
Facebook
Email
Invert Binary Tree
Question: Invert a binary tree. Input: 4 / \ 2 7 / \ / \ 1 3 6 9 Output: 4 / \ 7 2 / \ / \ 9 6 3 1 Solution Approach 1: Recursive The inverse of an…
Sameer Khoja
Apr 14, 2021
Share
Share this post
Invert Binary Tree
sweprep.substack.com
Copy link
Twitter
Facebook
Email
Divisor Game
Alice and Bob take turns playing a game, with Alice starting first. Initially, there is a number N on the chalkboard. On each player's turn, that player…
Sameer Khoja
Apr 7, 2021
Share
Share this post
Divisor Game
sweprep.substack.com
Copy link
Twitter
Facebook
Email
Single Number
Question: Given a non-empty array of integers nums, every element appears twice except for one. Find that single one. Solution Approach 1: Hash Table We…
Sameer Khoja
Mar 31, 2021
Share
Share this post
Single Number
sweprep.substack.com
Copy link
Twitter
Facebook
Email
Smallest Range
Given an array A of integers, for each integer A[i] we may choose any x with -K <= x <= K, and add x to A[i]. After this process, we have some array B…
Sameer Khoja
Mar 24, 2021
Share
Share this post
Smallest Range
sweprep.substack.com
Copy link
Twitter
Facebook
Email
Find the Distance Value Between Two Arrays
Lessons Learned: TreeSet, Array Manipulation
Sameer Khoja
Mar 7, 2021
Share
Share this post
Find the Distance Value Between Two Arrays
sweprep.substack.com
Copy link
Twitter
Facebook
Email
Valid Parentheses
Question: Implement an algorithm to print all valid (properly opened and closed) combinations of n pairs of parentheses.
Sameer Khoja
Feb 28, 2021
Share
Share this post
Valid Parentheses II
sweprep.substack.com
Copy link
Twitter
Facebook
Email
Median of Two Sorted Arrays
Lessons Learned: Array parsing
Sameer Khoja
Feb 21, 2021
Share
Share this post
Median of Two Sorted Arrays
sweprep.substack.com
Copy link
Twitter
Facebook
Email
Word Ladder
The problem: Given two words (start and end), and a dictionary, find the length of shortest transformation sequence from start to end.
Sameer Khoja
Feb 14, 2021
Share
Share this post
Word Ladder
sweprep.substack.com
Copy link
Twitter
Facebook
Email
Word Break II
Lessons learned: DFS
Sameer Khoja
Feb 4, 2021
Share
Share this post
Word Break II
sweprep.substack.com
Copy link
Twitter
Facebook
Email
Word Break
Question: Given a string s and a dictionary of words dict, determine if s can be segmented into a space-separated sequence of one or more dictionary…
Sameer Khoja
Jan 27, 2021
Share
Share this post
Word Break
sweprep.substack.com
Copy link
Twitter
Facebook
Email
Longest Palindromic Substring
👋 Hello! I’m gathering feedback on SWE Prep. If you like to provide suggestions or feedback, let us know on this survey here! Question: Given a string…
Sameer Khoja
Jan 22, 2021
Share
Share this post
Longest Palindromic Substring
sweprep.substack.com
Copy link
Twitter
Facebook
Email
This site requires JavaScript to run correctly. Please
turn on JavaScript
or unblock scripts