Master Data Structures

Understand how data is organized, stored, and managed for efficient access and modification. From simple arrays to complex graphs, learn the building blocks of efficient software.

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Complexity
O(1) Access

Arrays

A collection of elements identified by index or key. Contiguous memory allocation.

C++
Java
Py
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Complexity
O(n) Access

Linked Lists

Linear collection of data elements whose order is not given by their physical placement in memory.

Complexity
LIFO

Stacks

Abstract data type that serves as a collection of elements with Last-In-First-Out access.

Push / Pop: O(1)
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Complexity
FIFO

Queues

Collection of entities that are maintained in a sequence and can be modified by the addition of entities at one end.

Enq / Deq: O(1)
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Complexity
O(log n)

Trees

Hierarchical structure simulating a set of linked nodes. Essential for BST and Heaps.

Complexity
O(V+E)

Graphs

Set of objects where some pairs of objects are connected by links. Used in networks and maps.

BFS / DFS
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Complexity
O(1) Avg

Hash Tables

Implements an associative array abstract data type, a structure that can map keys to values.

Lookup / Insert
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