Data Structures

• String
• Array / matrix / Linked list
• Hash / Set
• Stack / Queue
• Tree / Heap / Trie / Graphs

---

Algorithm

• Sorting
• Dynamic Programming
• Backtracking / Recursion
• Divide and Conquer
• Greedy
• DFS / BFS
• Binary Search
• Two Pointers
• Sliding Window
• Union Find

Problems

Programming sites like Leetcode

• Arrays and Strings
  • Two Sum
  • Median of Two Sorted Arrays
  • Trapping Rain Water
  • Longest Substring Without Repeating Characters
  • K Closest Points to Origin
  • Merge Two Sorted Lists
  • Minimum Window Substring
  • Best Time to Buy and Sell Stock
  • Subarray Sum Equals K
  • Kth Largest Element in an Array
• Hash Table
  • Jewels and Stones
  • Single Number
  • Island Perimeter
  • Top K Frequent Elements
  • Intersection of Two Arrays
  • Find Anagram Mappings
  • Design HashMap
  • Find Common Characters
  • Subarray Sums Divisible by K
  • Largest Values From Labels
• Binary Search
  • Find the Duplicate Number
  • Maximum Nesting Depth of Two Valid Parentheses Strings
  • Time Based Key-Value Store
  • Intersection of Two Arrays II
  • Kth Smallest Element in a BST
  • Longest Duplicate Substring
  • Divide Chocolate
  • Search in a Sorted Array of Unknown Size
  • Count Negative Numbers in a Sorted Matrix
  • Maximum Profit in Job Scheduling
• Recursion
  • Range Sum of BST
  • All Possible Full Binary Trees
  • Special Binary String
  • Output Contest Matches
  • Minimum Distance Between BST Nodes
• Backtracking
  • Generate Parentheses
  • Permutations
  • Subsets
  • Combinations
  • Unique Paths III
• Divide and Conquer
  • Maximum Subarray
  • The Skyline Problem
  • Burst Balloons
  • Count of Smaller Numbers After Self
  • Search a 2D Matrix II
• Greedy Algorithm
  • Task Scheduler
  • Partition Labels
  • Employee Free Time
  • Score After Flipping Matrix
  • Split a String in Balanced Strings
• Dynamic programming
  • Counting Bits
  • Palindromic Substrings
  • Coin Change
  • Longest Increasing Subsequence
  • Partition to K Equal Sum Subsets
• Graph
  • Regions Cut By Slashes
  • Partition Array for Maximum Sum
  • Connecting Cities With Minimum Cost
  • Sort Integers by The Power Value
  • Parallel Courses
• Other
  • Longest String Chain
  • Longest Common Subsequence
  • LRU Cache
  • LFU Cache
  • Missing Number