HomePractice

OFFICIAL CURATED ARENA

</>Python Practice Arena

Curated Python 3.11 practice challenges across algorithms, data structures, recursion, and object-oriented architectures.

Your Progress

0 / 110 Solved

#	TITLE & TOPIC TAGS	CATEGORY	DIFFICULTY
01	Variable Swapping & Sum#Variables#Fundamentals	Python	Easy
02	Temperature Converter#Fundamentals#Type Casting	Python	Easy
03	Palindrome Checker#Strings#Fundamentals	Python	Easy
04	Count Vowels#Strings#Loops	Python	Easy
05	Sum of Positives#Lists#Fundamentals	Python	Easy
06	Maximum Element#Lists#Fundamentals	Python	Easy
07	List Filtering#Lists#Comprehensions	Python	Easy
08	List Comprehensions#Lists#Comprehensions	Python	Easy
09	Dictionary Frequency Counter#Dictionaries#Fundamentals	Python	Easy
10	String Formatting (f-strings)#Strings#Fundamentals	Python	Easy
11	Merge Dictionaries#Dictionaries#Fundamentals	Python	Easy
12	Remove Duplicates preserving order#Lists#Sets	Python	Easy
13	List Slicing#Lists#Fundamentals	Python	Easy
14	Tuple Unpacking#Tuples#Fundamentals	Python	Easy
15	Set Operations#Sets#Fundamentals	Python	Easy
16	Enumerate & Zip#Lists#Fundamentals	Python	Easy
17	Nested Dictionary Lookup#Dictionaries#Fundamentals	Python	Easy
18	Safe Division & Exception Handling#Fundamentals#Exceptions	Python	Easy
19	Basic File Reading#File I/O#Strings	Python	Easy
20	Basic CSV Parsing#Strings#File I/O	Python	Easy
21	OOP Class Encapsulation#OOP#Classes	Python	Medium
22	Timing logger Decorator#Decorators#Fundamentals	Python	Medium
23	Generators#Generators#Fundamentals	Python	Medium
24	Custom Iterators#Iterators#OOP	Python	Medium
25	Lambda Expressions#Lambdas#Sorting	Python	Medium
26	Collections.Counter#Libraries#Collections	Python	Medium
27	collections.defaultdict#Libraries#Collections	Python	Medium
28	collections.deque#Libraries#Collections	Python	Medium
29	heapq#Libraries#Heaps	Python	Medium
30	itertools#Libraries#Itertools	Python	Medium
31	functools.lru_cache#Libraries#Cache	Python	Medium
32	Regular Expressions#Libraries#Strings	Python	Medium
33	JSON Parsing & Transformation#JSON#Dictionaries	Python	Medium
34	CSV Processing#File I/O#Fundamentals	Python	Medium
35	Data Validation#Validation#Fundamentals	Python	Medium
36	Nested Data Processing#Lists#Loops	Python	Medium
37	Pandas Data Filtering#Pandas#Libraries	Python	Medium
38	Pandas GroupBy & Aggregation#Pandas#Libraries	Python	Medium
39	NumPy Array Operations#NumPy#Libraries	Python	Medium
40	Log File Analysis#Strings#File I/O	Python	Medium
41	Thread-Safe Queue#Concurrency#Locks	Data Structures & Algorithms	Hard
42	LRU Cache Memory Store#OOP#Design	Data Structures & Algorithms	Hard
43	Producer–Consumer Pipeline#Concurrency#Design	Data Structures & Algorithms	Hard
44	Streaming Log Processor#Design#Collections	Python	Hard
45	CSV → JSON ETL Pipeline#JSON#File I/O	Python	Hard
46	Flatten Nested JSON#JSON#Recursion	Python	Hard
47	Chunked File Processing#File I/O#Generators	Python	Hard
48	Trie / Prefix Search#Design#Algorithms	Data Structures & Algorithms	Hard
49	Async API Data Collector#Async#Concurrency	Python	Hard
50	Mini ETL Workflow Simulation#Design#Fundamentals	Python	Hard
51	Factorial of a Number#Math#Recursion	Data Structures & Algorithms	Easy
52	Find Simple Interest#Math#Finance	Data Structures & Algorithms	Easy
53	Find Compound Interest#Math#Finance	Data Structures & Algorithms	Easy
54	Check Armstrong Number#Math	Data Structures & Algorithms	Easy
55	Find Area of a Circle#Math#Geometry	Data Structures & Algorithms	Easy
56	Print all Prime Numbers in an Interval#Math#Algorithms	Data Structures & Algorithms	Medium
57	Check Prime Number#Math	Data Structures & Algorithms	Easy
58	N-th Fibonacci Number#Math#Dynamic Programming	Data Structures & Algorithms	Easy
59	Check if Number is Fibonacci#Math	Data Structures & Algorithms	Easy
60	Nth Multiple in Fibonacci Series#Math#Fibonacci	Data Structures & Algorithms	Medium
61	Print ASCII Value of a Character#Strings	Python	Easy
62	Sum of Squares of First N Natural Numbers#Math	Data Structures & Algorithms	Easy
63	Cube Sum of First N Natural Numbers#Math	Data Structures & Algorithms	Easy
64	Check if String is Palindrome#Strings	Data Structures & Algorithms	Easy
65	Check Symmetrical or Palindrome String#Strings	Data Structures & Algorithms	Medium
66	Reverse Words in a String#Strings	Data Structures & Algorithms	Easy
67	Remove All Duplicates From String#Strings	Data Structures & Algorithms	Easy
68	Least Frequent Character in String#Strings#Dictionaries	Data Structures & Algorithms	Easy
69	Find Words Greater Than Length K#Strings	Data Structures & Algorithms	Easy
70	Removing i-th Character from String#Strings	Data Structures & Algorithms	Easy
71	Replace Multiple Words with X#Strings	Data Structures & Algorithms	Medium
72	Find All Duplicate Characters in String#Strings#Counter	Data Structures & Algorithms	Medium
73	Replace All Occurrences of Substring#Strings	Data Structures & Algorithms	Easy
74	Sort List of Dictionaries by Values Using Lambda#Dictionaries#Lambda	Python	Medium
75	Merging Two Dictionaries#Dictionaries	Python	Easy
76	Extract Unique Dictionary Values#Dictionaries	Python	Easy
77	Sum of All Items in a Dictionary#Dictionaries	Python	Easy
78	Convert Key-Values List to Flat Dictionary#Dictionaries	Python	Medium
79	Insertion at Beginning in OrderedDict#Dictionaries#OrderedDict	Python	Medium
80	Remove Duplicate Words From Sentence#Strings	Data Structures & Algorithms	Easy
81	Find Mirror Characters in String#Strings	Data Structures & Algorithms	Medium
82	Counting Frequencies in List Using Dictionary#Dictionaries	Python	Easy
83	Convert List of Tuples into Dictionary#Dictionaries#Tuples	Python	Easy
84	Find Yesterday, Today and Tomorrow Date#DateTime	Python	Medium
85	Convert 12-Hour Time to 24-Hour Format#Strings#DateTime	Python	Medium
86	Difference Between Current Time and Given Time#DateTime	Python	Medium
87	Reverse a Linked List#Linked List#Data Structures	Data Structures & Algorithms	Medium
88	Find Largest Prime Factor of a Number#Math#Prime Factors	Data Structures & Algorithms	Medium
89	Print All Prime Factors of a Given Number#Math#Prime Factors	Data Structures & Algorithms	Medium
90	Product of Unique Prime Factors of a Number#Math#Prime Factors	Data Structures & Algorithms	Medium
91	Find Sum of Odd Factors of a Number#Math#Factors	Data Structures & Algorithms	Medium
92	Program for Coin Change#Dynamic Programming#Coins	Data Structures & Algorithms	Hard
93	Program for Tower of Hanoi#Recursion	Data Structures & Algorithms	Medium
94	Sieve of Eratosthenes#Math#Prime Numbers	Data Structures & Algorithms	Medium
95	Check Binary Representation is Palindrome#Bit Manipulation	Data Structures & Algorithms	Easy
96	Basic Euclidean Algorithm for GCD#Math#Algorithms	Data Structures & Algorithms	Easy
97	Extended Euclidean Algorithm#Math#Algorithms	Data Structures & Algorithms	Hard
98	Maximum Height of Triangle of Coins#Math	Data Structures & Algorithms	Easy
99	Find Minimum Sum of Factors of Number#Math#Factors	Data Structures & Algorithms	Medium
100	Difference Between Sums of Odd and Even Digits#Math	Data Structures & Algorithms	Easy
101	Print Matrix in Z Form#Matrix	Data Structures & Algorithms	Medium
102	Smallest K Digit Number Divisible by X#Math	Data Structures & Algorithms	Medium
103	Print Number Series Without Using Any Loop#Recursion	Data Structures & Algorithms	Medium
104	Number of Stopping Stations Problem#Combinatorics	Data Structures & Algorithms	Hard
105	Check Triangle of Positive Area with Given Angles#Geometry	Data Structures & Algorithms	Easy
106	Most Occurring Character and Its Count#Strings#Counter	Data Structures & Algorithms	Easy
107	Find Sum of Even Factors of a Number#Math#Factors	Data Structures & Algorithms	Medium
108	Check if All Digits of Number Divide It#Math	Data Structures & Algorithms	Easy
109	Check Consecutive Zeros in Given Base#Math#Base Conversion	Data Structures & Algorithms	Medium
110	Number of Solutions to Modular Equations#Math#Modular Arithmetic	Data Structures & Algorithms	Hard

#01Easy

Python

Variable Swapping & Sum

#Variables#Fundamentals

#02Easy

Python

Temperature Converter

#Fundamentals#Type Casting

#03Easy

Python

Palindrome Checker

#Strings#Fundamentals

#04Easy

Python

Count Vowels

#Strings#Loops

#05Easy

Python

Sum of Positives

#Lists#Fundamentals

#06Easy

Python

Maximum Element

#Lists#Fundamentals

#07Easy

Python

List Filtering

#Lists#Comprehensions

#08Easy

Python

List Comprehensions

#Lists#Comprehensions

#09Easy

Python

Dictionary Frequency Counter

#Dictionaries#Fundamentals

#10Easy

Python

String Formatting (f-strings)

#Strings#Fundamentals

#11Easy

Python

Merge Dictionaries

#Dictionaries#Fundamentals

#12Easy

Python

Remove Duplicates preserving order

#Lists#Sets

#13Easy

Python

List Slicing

#Lists#Fundamentals

#14Easy

Python

Tuple Unpacking

#Tuples#Fundamentals

#15Easy

Python

Set Operations

#Sets#Fundamentals

#16Easy

Python

Enumerate & Zip

#Lists#Fundamentals

#17Easy

Python

Nested Dictionary Lookup

#Dictionaries#Fundamentals

#18Easy

Python

Safe Division & Exception Handling

#Fundamentals#Exceptions

#19Easy

Python

Basic File Reading

#File I/O#Strings

#20Easy

Python

Basic CSV Parsing

#Strings#File I/O

#21Medium

Python

OOP Class Encapsulation

#OOP#Classes

#22Medium

Python

Timing logger Decorator

#Decorators#Fundamentals

#23Medium

Python

Generators

#Generators#Fundamentals

#24Medium

Python

Custom Iterators

#Iterators#OOP

#25Medium

Python

Lambda Expressions

#Lambdas#Sorting

#26Medium

Python

Collections.Counter

#Libraries#Collections

#27Medium

Python

collections.defaultdict

#Libraries#Collections

#28Medium

Python

collections.deque

#Libraries#Collections

#29Medium

Python

heapq

#Libraries#Heaps

#30Medium

Python

itertools

#Libraries#Itertools

#31Medium

Python

functools.lru_cache

#Libraries#Cache

#32Medium

Python

Regular Expressions

#Libraries#Strings

#33Medium

Python

JSON Parsing & Transformation

#JSON#Dictionaries

#34Medium

Python

CSV Processing

#File I/O#Fundamentals

#35Medium

Python

Data Validation

#Validation#Fundamentals

#36Medium

Python

Nested Data Processing

#Lists#Loops

#37Medium

Python

Pandas Data Filtering

#Pandas#Libraries

#38Medium

Python

Pandas GroupBy & Aggregation

#Pandas#Libraries

#39Medium

Python

NumPy Array Operations

#NumPy#Libraries

#40Medium

Python

Log File Analysis

#Strings#File I/O

#41Hard

Data Structures & Algorithms

Thread-Safe Queue

#Concurrency#Locks

#42Hard

Data Structures & Algorithms

LRU Cache Memory Store

#OOP#Design

#43Hard

Data Structures & Algorithms

Producer–Consumer Pipeline

#Concurrency#Design

#44Hard

Python

Streaming Log Processor

#Design#Collections

#45Hard

Python

CSV → JSON ETL Pipeline

#JSON#File I/O

#46Hard

Python

Flatten Nested JSON

#JSON#Recursion

#47Hard

Python

Chunked File Processing

#File I/O#Generators

#48Hard

Data Structures & Algorithms

Trie / Prefix Search

#Design#Algorithms

#49Hard

Python

Async API Data Collector

#Async#Concurrency

#50Hard

Python

Mini ETL Workflow Simulation

#Design#Fundamentals

#51Easy

Data Structures & Algorithms

Factorial of a Number

#Math#Recursion

#52Easy

Data Structures & Algorithms

Find Simple Interest

#Math#Finance

#53Easy

Data Structures & Algorithms

Find Compound Interest

#Math#Finance

#54Easy

Data Structures & Algorithms

Check Armstrong Number

#Math

#55Easy

Data Structures & Algorithms

Find Area of a Circle

#Math#Geometry

#56Medium

Data Structures & Algorithms

Print all Prime Numbers in an Interval

#Math#Algorithms

#57Easy

Data Structures & Algorithms

Check Prime Number

#Math

#58Easy

Data Structures & Algorithms

N-th Fibonacci Number

#Math#Dynamic Programming

#59Easy

Data Structures & Algorithms

Check if Number is Fibonacci

#Math

#60Medium

Data Structures & Algorithms

Nth Multiple in Fibonacci Series

#Math#Fibonacci

#61Easy

Python

Print ASCII Value of a Character

#Strings

#62Easy

Data Structures & Algorithms

Sum of Squares of First N Natural Numbers

#Math

#63Easy

Data Structures & Algorithms

Cube Sum of First N Natural Numbers

#Math

#64Easy

Data Structures & Algorithms

Check if String is Palindrome

#Strings

#65Medium

Data Structures & Algorithms

Check Symmetrical or Palindrome String

#Strings

#66Easy

Data Structures & Algorithms

Reverse Words in a String

#Strings

#67Easy

Data Structures & Algorithms

Remove All Duplicates From String

#Strings

#68Easy

Data Structures & Algorithms

Least Frequent Character in String

#Strings#Dictionaries

#69Easy

Data Structures & Algorithms

Find Words Greater Than Length K

#Strings

#70Easy

Data Structures & Algorithms

Removing i-th Character from String

#Strings

#71Medium

Data Structures & Algorithms

Replace Multiple Words with X

#Strings

#72Medium

Data Structures & Algorithms

Find All Duplicate Characters in String

#Strings#Counter

#73Easy

Data Structures & Algorithms

Replace All Occurrences of Substring

#Strings

#74Medium

Python

Sort List of Dictionaries by Values Using Lambda

#Dictionaries#Lambda

#75Easy

Python

Merging Two Dictionaries

#Dictionaries

#76Easy

Python

Extract Unique Dictionary Values

#Dictionaries

#77Easy

Python

Sum of All Items in a Dictionary

#Dictionaries

#78Medium

Python

Convert Key-Values List to Flat Dictionary

#Dictionaries

#79Medium

Python

Insertion at Beginning in OrderedDict

#Dictionaries#OrderedDict

#80Easy

Data Structures & Algorithms

Remove Duplicate Words From Sentence

#Strings

#81Medium

Data Structures & Algorithms

Find Mirror Characters in String

#Strings

#82Easy

Python

Counting Frequencies in List Using Dictionary

#Dictionaries

#83Easy

Python

Convert List of Tuples into Dictionary

#Dictionaries#Tuples

#84Medium

Python

Find Yesterday, Today and Tomorrow Date

#DateTime

#85Medium

Python

Convert 12-Hour Time to 24-Hour Format

#Strings#DateTime

#86Medium

Python

Difference Between Current Time and Given Time

#DateTime

#87Medium

Data Structures & Algorithms

Reverse a Linked List

#Linked List#Data Structures

#88Medium

Data Structures & Algorithms

Find Largest Prime Factor of a Number

#Math#Prime Factors

#89Medium

Data Structures & Algorithms

Print All Prime Factors of a Given Number

#Math#Prime Factors

#90Medium

Data Structures & Algorithms

Product of Unique Prime Factors of a Number

#Math#Prime Factors

#91Medium

Data Structures & Algorithms

Find Sum of Odd Factors of a Number

#Math#Factors

#92Hard

Data Structures & Algorithms

Program for Coin Change

#Dynamic Programming#Coins

#93Medium

Data Structures & Algorithms

Program for Tower of Hanoi

#Recursion

#94Medium

Data Structures & Algorithms

Sieve of Eratosthenes

#Math#Prime Numbers

#95Easy

Data Structures & Algorithms

Check Binary Representation is Palindrome

#Bit Manipulation

#96Easy

Data Structures & Algorithms

Basic Euclidean Algorithm for GCD

#Math#Algorithms

#97Hard

Data Structures & Algorithms

Extended Euclidean Algorithm

#Math#Algorithms

#98Easy

Data Structures & Algorithms

Maximum Height of Triangle of Coins

#Math

#99Medium

Data Structures & Algorithms

Find Minimum Sum of Factors of Number

#Math#Factors

#100Easy

Data Structures & Algorithms

Difference Between Sums of Odd and Even Digits

#Math

#101Medium

Data Structures & Algorithms

Print Matrix in Z Form

#Matrix

#102Medium

Data Structures & Algorithms

Smallest K Digit Number Divisible by X

#Math

#103Medium

Data Structures & Algorithms

Print Number Series Without Using Any Loop

#Recursion

#104Hard

Data Structures & Algorithms

Number of Stopping Stations Problem

#Combinatorics

#105Easy

Data Structures & Algorithms

Check Triangle of Positive Area with Given Angles

#Geometry

#106Easy

Data Structures & Algorithms

Most Occurring Character and Its Count

#Strings#Counter

#107Medium

Data Structures & Algorithms

Find Sum of Even Factors of a Number

#Math#Factors

#108Easy

Data Structures & Algorithms

Check if All Digits of Number Divide It

#Math

#109Medium

Data Structures & Algorithms

Check Consecutive Zeros in Given Base

#Math#Base Conversion

#110Hard

Data Structures & Algorithms

Number of Solutions to Modular Equations

#Math#Modular Arithmetic