Add Two Numbers
The problem gives two pointers that we will traverse simultaneously. In each iteration, we'll a...
LeetCode Problems
Longest Palindromic Substring
The key to understand with palindromes is that there are two different kinds of palindromes: **o...
Longest Substring Without Repeating Characters
The best approach to this problem is to have two pointers that traverse the string. At every poi...
Median of Two Sorted Arrays
The key to understand in this problem is that the two arrays are _already sorted_. So finding th...
Reverse Integer
This problem teaches a fundamental concept in programming; you can perform _array-like_ operatio...
Two Sum
The first approach might be to use brute force, checking every single pair combination in the ar...
Zigzag Conversion
We need to iterate over each character in the string and determine at each point which row the c...