Challenges - Python
10 More Pattern Programs in Python — Spiral, Star & More
10 intermediate and advanced pattern programs in Python — spiral matrix, hollow star, diamond, Fibonacci, binary, wave, and more. Code with output.
November 11, 2026
Concentric Number Square in Python — Code, Output & Explanation
Print the concentric number square pattern in Python with working code and output. Full implementation, sample run, and complexity analysis included.
October 18, 2026
Magic Square in Python — With Code, Output & Explanation
Print the magic square pattern in Python with working code and output. Full implementation, sample run, and complexity analysis included.
September 30, 2026
Alphabet Rhombus in Python — With Code, Output & Explanation
Print the alphabet rhombus pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners learning loops.
September 18, 2026
Best Time to Buy and Sell Stock in Python
Solve Best Time to Buy and Sell Stock in Python with working code. One-Pass Min Tracking (Optimal) approach with O(n) time, plus complexity analysis and interview tips.
September 12, 2026
Spiral Number Matrix in Python — With Code, Output & Explanation
Print the spiral number matrix pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners learning loops.
July 20, 2026
Spiral Maze Path in Python — With Code, Output & Explanation
Print the spiral maze path pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners learning loops.
July 02, 2026
Snake Matrix in Python — With Code, Output & Explanation
Print the snake matrix pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners learning loops.
June 04, 2026
Right Pascal Star in Python — With Code, Output & Explanation
Print the right pascal star pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners learning loops.
May 03, 2026
Reverse Linked List in Python — Iterative (Optimal) & More
Solve Reverse Linked List in Python with working code. Iterative (Optimal) approach with O(n) time, plus complexity analysis and interview tips.
April 09, 2026
Repeated Letter Rows in Python — With Code, Output & Explanation
Print the repeated letter rows pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners learning loops.
March 12, 2026
Pascal's Triangle in Python — With Code, Output & Explanation
Print the pascal's triangle pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners learning loops.
January 21, 2026
10 Advanced Pattern Programs in Python — Floyd's & More
Learn advanced Python pattern programs — Floyd's Triangle, Pascal's Triangle, Butterfly, Spiral Matrix, ZigZag, and more. Full source code with examples.
January 03, 2026
Palindromic Number Pyramid in Python — Code, Output & Explanation
Print the palindromic number pyramid pattern in Python. Complete working code, expected output, and a clear step-by-step explanation for beginners learning loops.
December 18, 2025
Number Pyramid in Python — With Code, Output & Explanation
Print the number pyramid pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners learning loops.
November 16, 2025
Maximum Subarray in Python — Kadane's Algorithm (Optimal) & More
Solve Maximum Subarray in Python four ways — Kadane's O(n) algorithm, brute force, divide-and-conquer, and index tracking — with interview tips.
October 23, 2025
Letter Diamond in Python — With Code, Output & Explanation
Print the letter diamond pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners learning loops.
September 01, 2025
Hollow Square Star in Python — With Code, Output & Explanation
Print the hollow square star pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners learning loops.
July 31, 2025
Hollow Cross Plus in Python — With Code, Output & Explanation
Print the hollow cross plus pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners learning loops.
July 03, 2025
Floyd's Triangle in Python — With Code, Output & Explanation
Print Floyd's Triangle in Python using nested loops. Five approaches with working code and output, complexity analysis, tests, and practice variations.
June 09, 2025
Cross/Plus Sign Star in Python — With Code, Output & Explanation
Print the cross/plus sign star pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners learning loops.
May 14, 2025
Christmas Tree Star in Python — With Code, Output & Explanation
Print the christmas tree star pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners learning loops.
March 25, 2025
Checkerboard in Python — With Code, Output & Explanation
Print the checkerboard pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners learning loops.
February 25, 2025
Right-Facing Arrowhead in Python — Code, Output & Explanation
Print the right-facing arrowhead pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners learning loops.
January 24, 2025
Alphabet Pyramid in Python — With Code, Output & Explanation
Print the alphabet pyramid pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners learning loops.
December 31, 2024
Alphabet Hollow Diamond in Python — Code, Output & Explanation
Print the alphabet hollow diamond pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners learning loops.
November 27, 2024
Alphabet Rectangle in Python — With Code, Output & Explanation
Print the alphabet rectangle pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners learning loops.
November 09, 2024
Solid Square Star Pattern in Python: Simple Grid Tutorial
Print a solid square star pattern in Python using nested loops or the string multiplication trick. Includes code, output, and practice variations.
October 08, 2024
Right Triangle Star Pattern in Python — Beginner Guide
Learn how to print a right triangle star pattern in Python with for-loops. Includes full code, output walkthrough, and 5 variations for beginners.
September 10, 2024
Remove Duplicates from Sorted Array in Python — 3 Ways
Safely remove duplicates in-place from a sorted array in Python. 3 approaches: two-pointers, slow-fast index tracking, and set-based shortcut, with complexity analysis.
August 29, 2024
Pyramid Star Pattern in Python — With Code, Output & Variations
Print the pyramid star pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners.
July 08, 2024
Linked List Cycle in Python — Floyd's Tortoise & Hare
Detect a cycle in a linked list two ways — hash set tracking and Floyd's Tortoise and Hare (fast/slow pointers) — with code and a dry run.
May 01, 2024
Left Triangle Star Pattern in Python: Easy Tutorial for Beginners
Print a left-aligned star triangle in Python using nested loops. Includes code walkthrough, output, and 4 variations to practice loop logic.
April 07, 2024
Inverted Right Triangle Star Pattern in Python — With Code
Print the inverted right triangle star pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners.
February 23, 2024
Contains Duplicate in Python: Set vs Dictionary vs Sorting
3 ways to detect duplicate elements in a Python array — set-based, dictionary-based, and sorting approaches compared with complexity analysis.
January 08, 2024