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Stacks coding challenges

Practise stacks with 5 coding challenges, from easy to hard. Every challenge runs in your browser with instant tests, an AI review of your code and community solutions to compare.

Medium · 3 Hard · 2

Skills you'll practise: Monotonic stackStacksArea calculationExecuting instructionsLinear timeRAIIRunning minimumTokenizing
  • Python · C++ · C#
  • Automated tests
  • AI code review
  • Community solutions
Programming
Programming fundamentalsFrom variables to recursion, for beginners
AI and machine learning
AI Learning HubNeural networks, ML and LLMs from scratch Neural networks from scratchNeurons, backpropagation and optimizers Machine learning from scratchRegression, classification and clustering Transformers and LLMs from scratchTokenizers, attention and text generation Classical AI and reinforcement learningSearch, games and reinforcement learning
226
Challenges
5
Solutions shared
3
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5 challenges
Hard

Largest Rectangle in a Histogram

Find the largest rectangle that fits under a histogram.

You'll learn Monotonic stackArea calculation
AdvancedCompetitive-programmingStacks
Python C++ C#
0 solved
No solutions yet
Hard

Mini Stack-Language Interpreter

Evaluate a small stack language.

You'll learn TokenizingExecuting instructions
InterpretersParsingStacks
Python C++ C#
0 solved
No solutions yet
Medium

Nearest Smaller Value to the Left

For each number, find the closest earlier position containing a strictly smaller number.

You'll learn Monotonic stackLinear time
ArraysStacks
Python C++ C#
0 solved
No solutions yet
Medium

RAII Release Order

Work out the order in which scoped resources are released when their scopes end, as RAII guarantees.

You'll learn RAIIStacks
Data-structuresSimulationStacks
Python C++ C#
0 solved
No solutions yet
Medium

Min Stack

Build a stack that reports its smallest element instantly after any push or pop.

You'll learn StacksRunning minimum
Data-structuresStacks
Python C++ C#
0 solved
No solutions yet

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