Learn Python Through Practical Projects
Master Python programming with 40 hands-on challenges designed for college-level learning. Progress from fundamentals to advanced algorithms and data structures.
Filter Challenges
🌱 Beginner
Anagram Cleanse: Letters Only
📚 CS 101
🏷️ strings
🏷️ normalize
🏷️ anagram
Estimated time: 30-60 minutes
🌱 Beginner
Caesar Cipher: Rotate Letters
📚 CS 101
🏷️ strings
🏷️ cipher
🏷️ modular arithmetic
Estimated time: 30-60 minutes
🌿 Intermediate
Canopy Walk: Level Order Traversal
📚 Data Structures I
🏷️ trees
🏷️ bfs
🏷️ queue
🏷️ level-order
Estimated time: 30-60 minutes
🌿 Intermediate
Crystal Heap: Min-Heap Core
📚 Data Structures I
🏷️ heap
🏷️ priority-queue
🏷️ data-structures
Estimated time: 30-60 minutes
🌿 Intermediate
Crystal Matrix: Kth Gleam
📚 Algorithms I
🏷️ heap
🏷️ binary-search
🏷️ matrix
🏷️ merge-k-sorted
Estimated time: 30-60 minutes
🌱 Beginner
Crystal Slot: Binary Search Insert Index
📚 CS 102: Problem Solving & Logic
🏷️ binary-search
🏷️ arrays
🏷️ search
Estimated time: 30-60 minutes
🌱 Beginner
Feather Sort: By Length then Lexicographic
📚 CS 101
🏷️ sorting
🏷️ strings
🏷️ multi-key sorting
Estimated time: 30-60 minutes
🌱 Beginner
First Unique Unicorn
📚 CS 102: Problem Solving & Logic
🏷️ strings
🏷️ hash-map
🏷️ counting
Estimated time: 30-60 minutes
🌿 Intermediate
Glass-Hoof Mirror: K-Edit Palindrome
📚 CS 101
🏷️ strings
🏷️ two-pointers
🏷️ palindrome
🏷️ greedy
Estimated time: 30-60 minutes
🌿 Intermediate
Glimmer MinStack: Constant-Time Min
📚 Data Structures I
🏷️ stack
🏷️ design
🏷️ data-structures
Estimated time: 30-60 minutes
🌳 Advanced
GroveMap: Simple HashMap
📚 Data Structures I
🏷️ hashmap
🏷️ design
🏷️ data structures
Estimated time: 30-60 minutes
🌿 Intermediate
Guild of Anagrams: Group Words
📚 CS 102: Problem Solving & Logic
🏷️ hashmap
🏷️ strings
🏷️ sorting
🏷️ grouping
Estimated time: 30-60 minutes
🌿 Intermediate
Hornsmith's Modular Inverse
📚 CS 101
🏷️ number-theory
🏷️ math
🏷️ extended-gcd
🏷️ cryptography
Estimated time: 30-60 minutes
🌱 Beginner
Isomorphic Runes: One-to-One Mapping
📚 CS 102: Problem Solving & Logic
🏷️ hashmap
🏷️ strings
🏷️ bijection
🏷️ pattern-matching
Estimated time: 30-60 minutes
🌿 Intermediate
Merge the Moons: Merge Intervals
📚 CS 102: Problem Solving & Logic
🏷️ sorting
🏷️ intervals
🏷️ greedy-algorithm
Estimated time: 30-60 minutes
🌿 Intermediate
Mini CSV: Sum Column by Header
📚 CS 101
🏷️ parsing
🏷️ strings
🏷️ data-processing
Estimated time: 30-60 minutes
🌱 Beginner
Mode Finder: Smallest on Tie
📚 CS 101
🏷️ hashmap
🏷️ statistics
🏷️ frequency-counting
Estimated time: 30-60 minutes
🌿 Intermediate
Moonbeam Queue: Two-Stack Queue
📚 Data Structures I
🏷️ queue
🏷️ stack
🏷️ design
🏷️ amortized-analysis
Estimated time: 30-60 minutes
🌳 Advanced
Moonlit Maze with Portals
📚 Algorithms I
🏷️ graphs
🏷️ bfs
🏷️ grid
🏷️ shortest-path
+1 more
Estimated time: 30-60 minutes
🌱 Beginner
One-Level Flatten
📚 CS 101
🏷️ lists
🏷️ arrays
🏷️ iteration
Estimated time: 30-60 minutes
🌱 Beginner
Orbital Shift: Rotate Array Right
📚 CS 102: Problem Solving & Logic
🏷️ arrays
🏷️ math
🏷️ modulo
🏷️ slicing
Estimated time: 30-60 minutes
🌱 Beginner
Pair Finder: Sum to Target
📚 CS 101
🏷️ arrays
🏷️ hashmap
🏷️ two-pointer
🏷️ complement-pattern
Estimated time: 30-60 minutes
🌱 Beginner
Parens Oracle: Valid Parentheses
📚 CS 102: Problem Solving & Logic
🏷️ stack
🏷️ strings
🏷️ validation
🏷️ matching
Estimated time: 30-60 minutes
🌿 Intermediate
Pasture Paint: Flood Fill
📚 CS 102: Problem Solving & Logic
🏷️ dfs
🏷️ bfs
🏷️ grid
🏷️ graph-traversal
+1 more
Estimated time: 30-60 minutes
🌳 Advanced
Rainbow Window: Minimum Covering Substring
📚 CS 102: Problem Solving & Logic
🏷️ sliding-window
🏷️ hashmap
🏷️ two-pointer
🏷️ strings
+1 more
Estimated time: 30-60 minutes
🌿 Intermediate
Rooted Runes: Shortest Prefix Replacement
📚 CS 102: Problem Solving & Logic
🏷️ trie
🏷️ strings
🏷️ prefix-matching
🏷️ dictionary
Estimated time: 30-60 minutes
🌿 Intermediate
Rootweave Trie: Dictionary Roots
📚 CS 102: Problem Solving & Logic
🏷️ trie
🏷️ data-structures
🏷️ prefix-tree
🏷️ dictionary
Estimated time: 30-60 minutes
🌱 Beginner
Royal Treasury: Currency Validator
📚 CS 101: Fundamentals
🏷️ regex
🏷️ validation
🏷️ strings
🏷️ parsing
Estimated time: 30-60 minutes
🌱 Beginner
Rune Ledger: Character Frequency
📚 CS 101: Fundamentals
🏷️ strings
🏷️ hash-map
🏷️ counting
🏷️ dictionary
Estimated time: 30-60 minutes
🌱 Beginner
Runic Compression: Run-Length Encoding
📚 CS 102: Problem Solving & Logic
🏷️ strings
🏷️ compression
🏷️ iteration
🏷️ encoding
Estimated time: 30-60 minutes
🌳 Advanced
Silvermane LRU Cache: Design Revisited
📚 CS 102: Problem Solving & Logic
🏷️ design
🏷️ lru-cache
🏷️ doubly-linked-list
🏷️ hashmap
+1 more
Estimated time: 30-60 minutes
🌳 Advanced
Stablehorn LRU Cache
📚 Data Structures
🏷️ design
🏷️ lru
🏷️ hashmap
🏷️ doubly-linked-list
Estimated time: 30-60 minutes
🌱 Beginner
Stablehorn Stack: Implement Stack
📚 CS 101: Fundamentals
🏷️ stack
🏷️ data-structures
🏷️ design
🏷️ arrays
+1 more
Estimated time: 30-60 minutes
🌿 Intermediate
Starbough: Validate BST
📚 Data Structures I
🏷️ bst
🏷️ trees
🏷️ dfs
🏷️ recursion
+1 more
Estimated time: 30-60 minutes
🌿 Intermediate
Summit Seeker: Find a Peak
📚 CS 102: Problem Solving & Logic
🏷️ binary-search
🏷️ arrays
🏷️ divide-and-conquer
Estimated time: 30-60 minutes
🌿 Intermediate
Tailflip: Reverse Singly Linked List
📚 Data Structures I
🏷️ linked-list
🏷️ pointers
🏷️ iteration
🏷️ in-place
Estimated time: 30-60 minutes
🌳 Advanced
Twin Song: Shortest Common Supersequence Length
📚 Algorithms I
🏷️ dp
🏷️ strings
🏷️ dynamic-programming
🏷️ lcs
+1 more
Estimated time: 30-60 minutes
🌳 Advanced
Unicorn Gala Scheduler
📚 Algorithms I
🏷️ dp
🏷️ intervals
🏷️ binary-search
🏷️ greedy
+1 more
Estimated time: 30-60 minutes
🌱 Beginner
Unicorn IDs: Deduplicate in Order
📚 CS 101
🏷️ lists
🏷️ sets
🏷️ order
🏷️ deduplication
+1 more
Estimated time: 30-60 minutes
🌱 Beginner
Vowel Valley: Most Common Vowel
📚 CS 101
🏷️ strings
🏷️ counts
Estimated time: 30-60 minutes
🌟 The Path to Code Mastery 🌟
Embark on your magical coding journey! Our enchanted progression system ensures you master each spell before learning the next. Every quest builds upon the last, creating powerful synergies.
🌱
Apprentice Level
Master the fundamentals: variables, input/output, and basic magical operations to begin your journey
Challenges 1-30
🌿
Adept Level
Learn advanced spells: functions, loops, lists, and dictionaries to manipulate data with precision
Challenges 31-70
🌳
Master Level
Wield ultimate power: classes, objects, and complex algorithms to create legendary software
Advanced Challenges
🌱
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🌿
→
🌳
→
🦄
Each completed quest brings you closer to becoming a Code Unicorn!