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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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Medium
Robot Command Simulator
Move a robot using L (turn left 90 degrees), R (turn right 90 degrees), and A (advance one step).
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Hard
Count Numbers With Distinct Neighbors
Count range values whose adjacent decimal digits are never equal.
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Medium
Count Coin Combinations
Count ways to make an amount with unlimited coins of specified denominations.
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Medium
Smallest Missing Coin Sum
Find the first positive amount that cannot be made from the available coins.
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