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Roadmaps
Data Structures
Fenwick Trees
Problemset
Discussion
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Arrays & Prefix Sums
0/50
Stacks & Monotonic Stacks
0/40
Queues & Deques
0/38
Hash Tables
0/40
Heaps & Priority Queues
0/43
Linked Lists
0/36
Binary Trees
0/35
Binary Search Trees
0/35
Tries
0/35
Union-Find
0/35
Segment Trees
0/35
Fenwick Trees
0/35
1
Intro
2
The Core Idea
3
Lowest Set Bit
4
Fenwick Tree Structure
5
Prefix Sum Query
6
Point Update
7
Building a Fenwick Tree
8
Problem - Range Sum Query Mutable
9
BIT Implementation
10
Range Sum BIT Solution
11
Range Update Point Query
12
Range Update Range Query
13
Problem - Count Inversions
14
Inversions with BIT
15
Count Inversions Solution
16
2D Fenwick Tree
17
2D Range Sum Query
18
Problem - Range Sum Query 2D Mutable
19
2D BIT Solution
20
Order Statistics with BIT
21
BIT for Offline Queries
22
Problem - Count Smaller After Self
23
Count Smaller BIT Solution
24
Problem - Reverse Pairs
25
Reverse Pairs Solution
26
BIT vs Segment Tree
27
BIT for XOR Queries
28
Finding First Position
29
Dynamic Frequency Queries
30
Problem - Global and Local Inversions
31
Global Local Solution
32
Common BIT Mistakes
33
Challenge: Implement Your Own
34
Quiz: Fenwick Trees
35
Section Recap
Sparse Tables
0/35
Sqrt Decomposition
0/42
Advanced Trees
0/42
Interval Trees
0/40
Wavelet Trees
0/37
Link-Cut Trees
0/39
Persistent Data Structures
0/37
12.1
Intro
2 minutes
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Tasks
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Data Structures - Roadmaps | Repovive