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- Challenges
Programming Challenges
Strengthen your problem-solving skills with language-neutral challenges you can solve in Python, C++, or C#. Every submission is checked by automated tests and reviewed by AI.
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Easy
Distance Between Points
Compute the straight-line distance between two points.
No solutions yet
Easy
Count Handshakes
Count handshakes when every pair of people shakes hands once.
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Medium
Two Nonattacking Knights
Count safe placements of two knights for each square board size.
No solutions yet
Medium
Raise a Fraction to a Real Power
Raise a positive fraction to a real-valued exponent.
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Medium
Raise a Number to a Fractional Power
Raise a positive real number to a rational exponent.
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Medium
Exact Fraction Arithmetic
Perform fraction operations and return a reduced fraction.
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Easy
Hours, Minutes, and Seconds
Convert a duration in seconds to a compact readable string.
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Medium
Number Spiral Lookup
Find a value by row and column in an expanding number spiral.
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