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DevEval
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Problems
Recursion
Topic
Recursion problems
16 problems: 1 Easy, 11 Medium, 4 Hard.
Easy (1)
Fibonacci Number
Medium (11)
Permutations
Pow(x, n)
Pow(x, n) - Fast Exponentiation
Unique Binary Search Trees II
Flatten Nested List Iterator
Predict the Winner
Find the Winner of the Circular Game
K-th Symbol in Grammar
Josephus Survivor
Modular Exponentiation
Extended GCD
Hard (4)
Expression Add Operators
Integer to English Words
Permutation Sequence
Flatten Nested Array
Other topics
Array
414
Math
223
String
204
Dynamic Programming
142
Hash Table
125
SQL
116
Tree
93
Matrix
83
Sorting
83
Simulation
66
Greedy
65
Binary Search
61
Machine Learning
59
Two Pointers
57
Stack
50
Graph
49
Data Engineering
48
Bit Manipulation
47
Heap
47
Sliding Window
44
Prefix Sum
42
Aggregation
38
Design
37
Backtracking
32
Linked List
32
Breadth-First Search
30
Depth-First Search
27
Combinatorics
25
Statistics
25
Number Theory
24
Binary Search Tree
23
Intervals
23
Joins
18
Divide and Conquer
17
Union Find
17
Geometry
16
Backend Systems
12
String Matching
12
Data Integrity
11
Shortest Path
11
Queue
10
Subqueries
9
Topological Sort
9
Trie
7
Game Theory
6
Window Functions
6
API
3
Brainteaser
3
Probability
3
Reliability
3
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