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Challenges
2,500 Python challenges
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When to Sleep?
Hard
Python
arrays
logic
numbers
Single Letter Swaps
Hard
Python
arrays
validation
loops
Sort by Factor Length
Hard
Python
arrays
sorting
loops
RegEx V: Negative Lookahead
Hard
Python
regex
formatting
strings
Matrix Multiplication
Hard
Python
algorithms
arrays
functional_programming
Paul Cipher
Hard
Python
cryptography
functional_programming
math
Maximize the First Number
Hard
Python
higher_order_functions
strings
XOR Cipher
Hard
Python
cryptography
algorithms
strings
Is It a Parallelogram?
Hard
Python
math
algebra
validation
Complete the Word
Hard
Python
strings
validation
regex
Message from Space
Hard
Python
strings
regex
recursion
Ordering People in a Line
Hard
Python
arrays
loops
Simple Minesweeper
Hard
Python
games
arrays
The Susquehanna Hat Company
Hard
Python
loops
math
Palindrome Sequence
Hard
Python
loops
strings
numbers
Mountains or Valleys
Hard
Python
arrays
functional_programming
higher_order_functions
Sexagenary Cycle (Chinese Zodiac)
Hard
Python
language_fundamentals
loops
Fruit Smoothie
Hard
Python
classes
formatting
objects
Piggy Bank
Hard
Python
algebra
math
loops
Difference Cipher
Hard
Python
strings
arrays
loops
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