LeetCode

Learn LeetCode in a practical order—from the fundamentals to work you can confidently share.

In short— Hakuna kurukaruka tutorials. Follow the route, practice each stage, then ship kitu real.

Free roadmap

What you'll learn

Click any stage kufungua full details.

01Stage 01Build the mental modelWhat Is Leetcode • Find Median From Data Stream • Network Delay Time

Learn the principles that help you make stronger technical decisions.

Focus on

  • What Is Leetcode
  • Find Median From Data Stream
  • Network Delay Time
Build check: Write a one-page LeetCode glossary in your own words.

Usibinge theory pekee—test hii stage kwa project ndio ishike.

02Stage 02Core building blocksAdvanced Graphs • 1 D Dynamic Programming • 2 D Dynamic Programming

Connect the important concepts so you can explain what the tools are doing—not just copy commands.

Focus on

  • Advanced Graphs
  • 1 D Dynamic Programming
  • 2 D Dynamic Programming
Build check: Complete three focused LeetCode exercises without following a full tutorial.

Usibinge theory pekee—test hii stage kwa project ndio ishike.

03Stage 03Everyday workflow3sum • Arrays Hashing • Backtracking

Practice the techniques you will use repeatedly in real projects and team environments.

Focus on

  • 3sum
  • Arrays Hashing
  • Backtracking
Build check: Recreate a small LeetCode example, then change one major requirement.

Usibinge theory pekee—test hii stage kwa project ndio ishike.

04Stage 04Build something usefulBest Time To Buy And Sell • Binary Search • Binary Tree Level Order

Turn the knowledge into a small project with a clear user, purpose and finish line.

Focus on

  • Best Time To Buy And Sell
  • Binary Search
  • Binary Tree Level Order
Build check: Build a useful mini-project with LeetCode.

Usibinge theory pekee—test hii stage kwa project ndio ishike.

05Stage 05Quality and productionBinary Tree Maximum Path Sum • Bit Manipulation • Burst Balloons

Add testing, security, performance and maintainability before calling the work complete.

Focus on

  • Binary Tree Maximum Path Sum
  • Bit Manipulation
  • Burst Balloons
Build check: Review, test and improve the project like it is going to real users.

Usibinge theory pekee—test hii stage kwa project ndio ishike.

06Stage 06Ship proofCharacter Replacement • Cheapest Flights Within K Stops • Climbing Stairs

Publish a polished project, document your decisions and make the learning visible.

Focus on

  • Character Replacement
  • Cheapest Flights Within K Stops
  • Climbing Stairs
Build check: Publish the project with a clear README and a short build story.

Usibinge theory pekee—test hii stage kwa project ndio ishike.

Now build kitu real.

Pick a project that solves an actual problem, ship it, then explain your choices. Hapo ndio skill inakuwa proof.

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