Shahrouz Nikseresht - DEV Community

Shahrouz Nikseresht

Dec 30 '25

Day 80: Python Search in Rotated Sorted rArray - Final Challenge O(log n) Binary Search Mastery (LeetCode #33 Vibes)

#challenge #python #algorithms #datastructures

3 min read

Shahrouz Nikseresht

Dec 29 '25

Day 79: Python Deep Copy Graph – HashMap-Based Cloning for Cycles and Shared Nodes (LeetCode #133 Style)

#challenge #python #algorithms #datastructures

3 min read

Shahrouz Nikseresht

Dec 28 '25

Day 78: Python Move Zeros to End – O(n) In-Place Two-Pointer Technique for Array Reordering (LeetCode #283 Guide)

#challenge #python #algorithms #datastructures

2 min read

Shahrouz Nikseresht

Dec 27 '25

Day 77: Python Trailing Zeros in Factorial – Genius Number Theory Trick to Count Zeros in n! Without Computing the Huge Number

#challenge #python #algorithms #programming

2 min read

Shahrouz Nikseresht

Dec 26 '25

Day 76: Python Binary Exponentiation – O(log n) Fast Power Calculation Without Built-Ins

#challenge #python #algorithms #programming

2 min read

Shahrouz Nikseresht

Dec 25 '25

Day 75: Python Counting Sort by Zeros – Stable O(n) Custom Key Sort for Digit Counts (Algo Mastery)

#challenge #python #algorithms #datastructures

2 min read

Shahrouz Nikseresht

Dec 24 '25

Day 74: Python Validate IPv4 Address – String Parsing Mastery for Perfect IP Check (No Libraries Needed)

#challenge #python #algorithms #programming

2

2 min read

Shahrouz Nikseresht

Dec 23 '25

Day 73: Python Longest Palindromic Substring – Expand-Around-Center O(n^2) Technique for Max Palindrome (LeetCode #5 Guide)

#challenge #python #algorithms #programming

2 min read

Shahrouz Nikseresht

Dec 22 '25

Day 72: Python Sliding Window Maximum - Deque O(n) Solution for Efficient Max Tracking (LeetCode #239 Guide)

#challenge #python #algorithms #datastructures

2 min read

Shahrouz Nikseresht

Dec 21 '25

Day 71: Python Three Sum – Two-Pointer O(n^2) Solution for Unique Zero-Sum Triplets (LeetCode #15 Vibes)

#challenge #python #algorithms #programming

3 min read

Shahrouz Nikseresht

Dec 20 '25

Day 70: Python Wildcard Matching – DP Solution for '?' and '' Patterns in O(nm) (LeetCode #44 Mastery)

#challenge #python #algorithms #programming

1

2 min read

Shahrouz Nikseresht

Dec 19 '25

Day 69: Python Conway's Game of Life - Simulate One Step of Cellular Automata with Neighbor Scanning Magic

#challenge #python #algorithms #programming

1

3 min read

Shahrouz Nikseresht

Dec 18 '25

Day 68: Python Unique Paths in Grid - O(m*n) DP Solution for Robot Paths (LeetCode #62 Vibes)

#challenge #python #algorithms #programming

1

3 min read

Shahrouz Nikseresht

Dec 17 '25

Day 67: Python Shortest Path in Unweighted Graph - BFS Queue Magic for O(V+E) Routing Mastery (LeetCode Vibes)

#challenge #python #algorithms #datastructures

1

3 min read

Shahrouz Nikseresht

Dec 16 '25

Day 66: Python Invert Binary Tree, Recursive Mirror Swap for Perfect Tree Symmetry (LeetCode #226 Style)

#challenge #python #algorithms #datastructures

1

2 min read

Shahrouz Nikseresht

Dec 15 '25

Day 65: Python Breadth-First Search (BFS) on Tree, Queue-Based Level-Order Traversal for Shortest Path and Layer Exploration

#challenge #python #algorithms #datastructures

1

2 min read

Shahrouz Nikseresht

Dec 14 '25

Day 64: Python Depth-First Search (DFS) on Tree, Stack-Based Iterative Traversal for Deep Exploration Without Recursion

#challenge #python #algorithms #datastructures

1

2 min read

Shahrouz Nikseresht

Dec 13 '25

Day 63: Python Merge K Sorted Lists - O(n log k) Min-Heap Guide (LeetCode #23 Vibes)

#challenge #python #algorithms #datastructures

1

3 min read

Shahrouz Nikseresht

Dec 12 '25

Day 62: Python Longest Subarray with Target Sum - O(n) Prefix Sum & HashMap Guide (LeetCode Vibes)

#challenge #python #algorithms #datastructures

1

3 min read

Shahrouz Nikseresht

Dec 11 '25

Day 61: Python Queue Using Two Stacks, Amortized O(1) Unbiased FIFO with Brilliant Double-Stack Flip Trick (No Deque Cheats!)

#challenge #python #algorithms #datastructures

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3 min read

Shahrouz Nikseresht

Dec 10 '25

Day 60: Python Remove Nth Node From End of Linked List, Two-Pointer Magic to Delete in One Pass (LeetCode #19 Style)

#challenge #python #datastructures #leetcode

1

3 min read

Shahrouz Nikseresht

Dec 9 '25

Day 59: Python Reverse Singly Linked List, Master the Iterative Pointer Flip Technique for O(n) Reversal

#challenge #python #datastructures #algorithms

3 min read

Shahrouz Nikseresht

Dec 8 '25

Day 58: Python Run-Length Encoding (RLE) – Compress Strings Like a Pro with This Ultra-Simple O(n) Trick

#challenge #python #intermediate #programming

2 min read

Shahrouz Nikseresht

Dec 7 '25

Day 57: Python GCD & LCM with Euclidean Algorithm, Lightning-Fast Divisor Math That's 2000+ Years Old (And Still Unbeatable)

#challenge #python #intermediate #algorithms

3 min read

Shahrouz Nikseresht

Dec 6 '25

Day 56: Python Fibonacci nth Term – Blazing Fast O(n) Iterative Solution with O(1) Space (No Recursion!)

#challenge #python #intermediate #programming

2 min read

Shahrouz Nikseresht

Dec 5 '25

Day 55: Python Calculate Mean & Median Manually – No Statistics Module, Just Pure Python Power

#challenge #python #intermediate #programming

3 min read

Shahrouz Nikseresht

Dec 4 '25

Day 54: Python Summary Ranges – Compress Sorted Unique Integers into Minimal "a->b" Strings Like LeetCode Pros

#challenge #python #intermediate #programming

3 min read

Shahrouz Nikseresht

Dec 3 '25

Day 53: Python Count Overlapping Substrings – The Hidden Limitation of str.count() and the Perfect Sliding Window Fix

#challenge #python #intermediate #programming

3 min read

Shahrouz Nikseresht

Dec 2 '25

Day 52: Python Longest Continuous Increasing Subarray – Find the Maximum Length of Strictly Increasing Adjacent Elements in O(n)

#challenge #python #intermediate #programming

1

3 min read

Shahrouz Nikseresht

Dec 1 '25

Day 51: Python First Unique Character – Find the First Non-Repeating Char in String with Hash Map Magic

#challenge #python #intermediate #programming

1

2 min read

Shahrouz Nikseresht

Nov 30 '25

Day 50: Python Group Anagrams – The Cleanest O(n * m log m) Way to Cluster Words by Letter Signature

#challenge #python #intermediate #programming

1

2 min read

Shahrouz Nikseresht

Nov 29 '25

Day 49: Python Playlist Shuffler – True Unbiased Random Shuffle with Fisher-Yates Algorithm

#challenge #python #intermediate #programming

1

3 min read

Shahrouz Nikseresht

Nov 28 '25

Day 48: Python Merge Two Sorted Lists - Master the Two-Pointer Technique in Pure O(n)

#challenge #python #intermediate #programming

1

3 min read

Shahrouz Nikseresht

Nov 27 '25

Day 47: Python Rotate Array to Right by K Steps – Master the Elegant Slicing Trick in One Line

#challenge #python #intermediate #programming

1

3 min read

Shahrouz Nikseresht

Nov 26 '25

Day 46: Python Moving Average Calculator, Optimized Sliding Window for Simple Moving Average Computation

#challenge #python #intermediate #programming

1

2 min read

Shahrouz Nikseresht

Nov 25 '25

Day 45: Python Majority Element Finder, Boyer-Moore Voting Algorithm for Efficient Detection in Arrays

#challenge #python #intermediate #programming

1

2 min read

Shahrouz Nikseresht

Nov 24 '25

Day 44: Python Longest Substring Finder, Sliding Window Technique for Non-Repeating Characters Length

#challenge #python #intermediate #programming

5

2 min read

Shahrouz Nikseresht

Nov 23 '25

Day 43: Python Valid Parentheses Checker, Stack-Based Bracket Validation with Mapping and Loop Scanning

#challenge #python #intermediate #programming

1

2 min read

Shahrouz Nikseresht

Nov 22 '25

Day 42: Python Roman Numeral Converter, Bidirectional Conversion Between Roman and Integers with Mapping and Loops

#challenge #python #intermediate #programming

1

3 min read

Shahrouz Nikseresht

Nov 21 '25

Day 41: Python Happy Number Checker, Detect Numbers Leading to 1 Through Digit Square Sums with Cycle Detection

#challenge #python #intermediate #programming

1

3 min read

Shahrouz Nikseresht

Nov 20 '25

Day 40: Python Armstrong Numbers Finder, Detect Narcissistic Numbers in a Range with Digit Power Sum

#challenge #python #intermediate #programming

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2

3 min read

Shahrouz Nikseresht

Nov 19 '25

Day 39: Python Word Counter, Count Words in Text with Whitespace Handling

#challenge #python #beginners #programming

1

2 min read

Shahrouz Nikseresht

Nov 18 '25

Day 38: Python Domain Extractor, Pull Unique Domains from Emails with Validation and Order Preservation

#challenge #python #beginners #programming

1

3 min read

Shahrouz Nikseresht

Nov 17 '25

Demystifying Python's if name == 'main': Easy Guide for Beginners

#python #beginners #tutorial #programming

1

3 min read

Shahrouz Nikseresht

Nov 17 '25

Day 37: Python Image Search, Case-Insensitive Filter for Matching Terms in Lists

#challenge #python #beginners #programming

1

2 min read

Shahrouz Nikseresht

Nov 16 '25

Day 36: Python Integer Sequence Generator, Efficiently Concatenate Numbers from 1 to n with Interactive Input

#challenge #python #beginners #programming

1

5 min read

Shahrouz Nikseresht

Nov 15 '25

Day 35: Python Morse Code Generator, Convert English Text to Morse with Full A-Z Mapping and Interactive Input

#challenge #python #beginners #programming

1

4 min read

Shahrouz Nikseresht

Nov 14 '25

Day 34: Python Balanced Numbers Filter, Identify Numbers with Equal Even and Odd Digits Using Modular Checks

#challenge #python #beginners #programming

4 min read

Shahrouz Nikseresht

Nov 13 '25

Building a Simple Personal Library with Python: My Experience from Zero to Execution

#python #cli #tutorial #programming

5

2

20 min read

Shahrouz Nikseresht

Nov 13 '25

Day 33: Python Sort by Vowels, Custom Sorting Fruits by Vowel Count with Keys

#challenge #python #beginners #programming

1

3 min read

Shahrouz Nikseresht

Nov 12 '25

Day 32: Python Temperature Converter, Switch Between Fahrenheit and Celsius with Inputs

#challenge #python #beginners #programming

1

2 min read

Shahrouz Nikseresht

Nov 11 '25

Day 31: Python List Rotator, Shift Elements Right by One with Manual Indexing

#challenge #python #beginners #programming

1

3 min read

Shahrouz Nikseresht

Nov 10 '25

Day 30: Python List Merger, Combine Two Lists Manually with Loops

#challenge #python #beginners #programming

2 min read

Shahrouz Nikseresht

Nov 9 '25

Day 29: Python Strong Password Generator, Create Secure Passwords with Random and Constraints

#challenge #python #beginners #programming

1

3 min read

Shahrouz Nikseresht

Nov 8 '25

Day 28: Python Bubble Sort, Implement a Simple Sorting Algorithm with Nested Loops

#challenge #python #beginners #programming

3 min read

Shahrouz Nikseresht

Nov 7 '25

Day 27: Python Mode Finder, Find the Most Frequent Element in a List Using Dicts

#algorithms #beginners #tutorial #python

2 min read

Shahrouz Nikseresht

Nov 6 '25

80 Days of Python Challenges: How I Turned Consistency into Progress

#python #learning #devjournal #programming

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1

4 min read

Shahrouz Nikseresht

Nov 6 '25

Day 26: Python Book Sorter, Sort a Library by Page Count with Lambda Keys

#challenge #python #beginners #programming

3 min read

Shahrouz Nikseresht

Nov 5 '25

Day 25: Python Coin Flip Game, Simple Interactive Guessing with Random

#challenge #python #beginners #programming

1

3 min read

Shahrouz Nikseresht

Nov 4 '25

Day 24: Python Countdown with Boom – Reverse Loop Printing "Boom" on Multiples of 3

#challenge #python #beginners #programming

3 min read

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