Count Largest Group
Lessons Learned: HashMaps
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Dormant Last read · last published · next check
Read 4 days ago and current, but nothing has been published for 5 years.
Latest posts
Invert Binary Tree
Question: Invert a binary tree.
Divisor Game
Alice and Bob take turns playing a game, with Alice starting first.
Single Number
Question: Given a non-empty array of integers nums, every element appears twice except for one.
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].
Find the Distance Value Between Two Arrays
Lessons Learned: TreeSet, Array Manipulation
Valid Parentheses II
Question: Implement an algorithm to print all valid (properly opened and closed) combinations of n pairs of parentheses.
Median of Two Sorted Arrays
Lessons Learned: Array parsing
Word Ladder
The problem: Given two words (start and end), and a dictionary, find the length of shortest transformation sequence from start to end.
Word Break II
Lessons learned: DFS