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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.

  • Python · C++ · C#
  • Automated tests
  • AI code review
  • Community solutions
Learning path
150
Challenges
2
Solutions shared
3
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All challenges

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7 challenges
Hard

Course Schedule Order

Order courses so every prerequisite comes first.

AdvancedGraphsHackathonTopological-sort
Python C++ C#
0 solved
No solutions yet
Medium

Shortest Weighted Routes

Find the minimum total route cost from city 1 to each city.

GraphsPriority-queuesShortest-path
Python C++ C#
0 solved
No solutions yet
Hard

Minimum Network Connection Cost

Choose undirected links so that every vertex can reach every other vertex, with minimum total cost.

Disjoint-setsGraphsMinimum-spanning-tree
Python C++ C#
0 solved
No solutions yet
Hard

Longest Path in a DAG

Find the heaviest path in a task dependency graph.

AdvancedGraphsHackathonTopological-sort
Python C++ C#
0 solved
No solutions yet
Hard

Strongly Connected Components

Count groups of nodes that can all reach each other.

AdvancedCompetitive-programmingGraphs
Python C++ C#
0 solved
No solutions yet
Medium

Tree Diameter

A tree is a connected undirected graph with no cycles.

GraphsTrees
Python C++ C#
0 solved
No solutions yet
Medium

Can We Split Into Two Teams?

Decide whether people can be assigned to two teams so that each listed pair is on opposite teams.

BipartiteGraphs
Python C++ C#
0 solved
No solutions yet