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HackerRank Topics (Tutorials)

Collection of all HackerRank tutorial topics organized in a logical learning sequence.

📌 Notes

  1. List of topic URLs (As of Feb 29, 2016)
  2. Some links may become temporarily unavailable or contain minor typos
  3. Topics organized from beginner → advanced within each category
  4. I have moved to:

📊 Legend

Symbol Difficulty
🟢 Beginner
🟡 Intermediate
🔴 Advanced

📈 Learning Path Recommendation

🟢 1. Programming Basics

# Topic Link
1 If-Else Statements if-else-statements
2 Pairs (Tuples) pair

🟢 2. Basic Math Operations

# Topic Link
3 Average average
4 Division & Modulo div-mod
5 Ceiling & Floor Functions ceil-floor
6 Finding Maximum & Minimum finding-max-min
7 Maxima & Minima maxima-minima
8 Square Root square-root
9 Integer to Array Conversion integer-to-array
10 Binary Number System binary

🟢 3. Bit Manipulation

# Topic Link
11 Bitwise OR bitwise-or
12 Bitwise XOR bitwise-xor

🟢 4. Basic Data Structures

# Topic Link
13 Arrays arrays
14 Pointers & Linked Lists (Intro) pointers-and-linked-lists
15 Linked Lists linked-lists
16 Stacks stacks
17 Queues queues
18 Dictionary (Hash Map) dictionary
19 Set set
20 Multi-Set multi-set

🟢 5. String Fundamentals

# Topic Link
21 String Basics string-basics
22 Alphabets alphabets
23 Strings (Essay) strings-essay
24 Strings (Comprehensive) strings-long
25 Palindrome palindrome
26 Anagram anagram
27 Next Permutation next-permutation

🟢 6. Basic Techniques

# Topic Link
28 Prefix Sum prefix-sum
29 Two Pointer Technique two-pointer-technique
30 Precomputation precomputation
31 Caching caching
32 Counting Techniques counting

🟡 7. Sorting Algorithms

# Topic Link
33 Sorting (Introduction) sorting
34 Sorting (Essay) sorting-essay
35 Sorting (Comprehensive) sorting-long
36 Insertion Sort insertion-sort
37 Counting Sort counting-sort
38 Merge Sort merge-sort
39 Quicksort quicksort

🟡 8. Searching Algorithms

# Topic Link
40 Search (Introduction) search
41 Search (Essay) search-essay
42 Binary Search binary-search
43 Ternary Search ternary-search

🟡 9. Number Theory & Arithmetic

# Topic Link
44 Divisors divisors
45 Greatest Common Divisor (GCD) gcd
46 Sieve of Eratosthenes sieve-of-eratosthenes
47 Sieve of Eratosthenes (Linear Time) sieve-of-eratosthenes-linear-time
48 Euler's Totient Function euler-function
49 Fibonacci Numbers fibonacci-numbers
50 Binet's Formula binets-formula
51 Closed-Form Expressions closed-form
52 Fast Exponentiation fast-exponentiation
53 Matrix Exponentiation matrix-exponentiation
54 Diophantine Equations (ax + by = c) diophantine-equations-with-two-unknowns-ax-by-c
55 Gaussian Elimination gaussian-elimination

🟡 10. Combinatorics & Probability

# Topic Link
56 Basic Combinatorics basic-combinatorics
57 Expectation Values expectation-values
58 Burnside's Lemma burnsides-lemma

🟡 11. Geometry

# Topic Link
59 Manhattan Distance manhattan-distance
60 2-Line Intersection 2-line-intersection
61 3D Lines 3d-lines
62 3D Planes 3d-planes
63 Convex Hull convex-hull

🟡 12. Trees & Heaps

# Topic Link
64 Binary Trees & Binary Search Trees binary-trees-and-binary-search-trees
65 Tree Traversals tree-traversals
66 Heaps heaps
67 Priority Queue priority-queue
68 Disjoint Set (Union-Find) disjoint-set
69 Lowest Common Ancestor (LCA) lowest-common-ancestor
70 Diameter in Trees diameter-in-trees

🟡 13. Graph Fundamentals

# Topic Link
71 Depth-First Search (DFS) depth-first-search
72 Breadth-First Search (BFS) breadth-first-search
73 Topological Sorting topological-sorting

🟡 14. Shortest Path Algorithms

# Topic Link
74 Shortest Paths in Graphs (Intro) shortest-paths-in-graphs
75 Shortest Path in Graphs shortest-path-in-graphs
76 Dijkstra's Algorithm dijkstras-algorithm
77 Bellman-Ford Algorithm bellman-ford-algorithm
78 Floyd-Warshall Algorithm floyd-warshall-algorithm
79 Bipartite Matching bipartite-matching

🟡 15. Greedy Algorithms

# Topic Link
80 Greedy Technique greedy-technique

🟡 16. Dynamic Programming

# Topic Link
81 Dynamic Programming Basics dynamic-programming-basics
82 Dynamic Programming dynamic-programming
83 Longest Common Subsequence (LCS) longest-common-subsequence
84 Digit DP digit-dp

🔴 17. Advanced Data Structures

# Topic Link
85 Trie (Prefix Tree) trie
86 Segment Tree segment-tree
87 Lazy Propagation lazy-propagation
88 Binary Indexed Tree (Fenwick Tree) binary-indexed-tree
89 Sparse Tables sparse-tables
90 Persistent Data Structures persistent-data-structures

🔴 18. Advanced String Algorithms

# Topic Link
91 Suffix Array suffix-array
92 LCP Array (Longest Common Prefix) lcp-array
93 Z-Function (Z-Algorithm) z-function
94 Manacher's Algorithm manachers-algorithm

🔴 19. Advanced Algorithms & Techniques

# Topic Link
95 Mo's Algorithm mos-algorithm

🔴 20. Game Theory

# Topic Link
96 Game Theory & Grundy Numbers game-theory-and-grundy-numbers

🔴 21. Advanced Theorems & Formulas

# Topic Link
97 Prüfer's Code & Cayley's Formula prufers-code-and-cayleys-formula
98 Dilworth's Theorem dilworths-theorem
99 Turán's Theorem turans-theorem

Total Topics: 99