𝐂𝐨𝐝𝐢𝐧𝐠 𝐏𝐚𝐭𝐭𝐞𝐫𝐧𝐬

𝐂𝐨𝐝𝐢𝐧𝐠 𝐩𝐚𝐭𝐭𝐞𝐫𝐧𝐬 𝐞𝐧𝐡𝐚𝐧𝐜𝐞 𝐨𝐮𝐫 “𝐚𝐛𝐢𝐥𝐢𝐭𝐲 𝐭𝐨 𝐦𝐚𝐩 𝐚 𝐧𝐞𝐰 𝐩𝐫𝐨𝐛𝐥𝐞𝐦 𝐭𝐨 𝐚𝐧 𝐚𝐥𝐫𝐞𝐚𝐝𝐲 𝐤𝐧𝐨𝐰𝐧 𝐩𝐫𝐨𝐛𝐥𝐞𝐦.”



Here, gathered around 20 of these coding problem patterns that I believe can help anyone learn these beautiful algorithmic techniques and make a real difference in the coding interviews.

The idea behind these patterns is that once you’re familiar with a pattern, you’ll be able to solve dozens of problems with it.

So, without further ado, let me list all these patterns:



1. 𝐒𝐥𝐢𝐝𝐢𝐧𝐠 𝐖𝐢𝐧𝐝𝐨𝐰



2. 𝐈𝐬𝐥𝐚𝐧𝐝𝐬 (𝐌𝐚𝐭𝐫𝐢𝐱 𝐓𝐫𝐚𝐯𝐞𝐫𝐬𝐚𝐥)


3. 𝐓𝐰𝐨 𝐏𝐨𝐢𝐧𝐭𝐞𝐫𝐬



4. 𝐅𝐚𝐬𝐭 & 𝐒𝐥𝐨𝐰 𝐏𝐨𝐢𝐧𝐭𝐞𝐫𝐬



5. 𝐌𝐞𝐫𝐠𝐞 𝐈𝐧𝐭𝐞𝐫𝐯𝐚𝐥𝐬



6. 𝐂𝐲𝐜𝐥𝐢𝐜 𝐒𝐨𝐫𝐭



7. 𝐈𝐧-𝐩𝐥𝐚𝐜𝐞 𝐑𝐞𝐯𝐞𝐫𝐬𝐚𝐥 𝐨𝐟 𝐚 𝐋𝐢𝐧𝐤𝐞𝐝𝐋𝐢𝐬𝐭



8. 𝐓𝐫𝐞𝐞 𝐁𝐫𝐞𝐚𝐝𝐭𝐡-𝐅𝐢𝐫𝐬𝐭 𝐒𝐞𝐚𝐫𝐜𝐡



9. 𝐓𝐫𝐞𝐞 𝐃𝐞𝐩𝐭𝐡 𝐅𝐢𝐫𝐬𝐭 𝐒𝐞𝐚𝐫𝐜𝐡



10. 𝐓𝐰𝐨 𝐇𝐞𝐚𝐩𝐬

11. 𝐒𝐮𝐛𝐬𝐞𝐭𝐬

12. 𝐌𝐨𝐝𝐢𝐟𝐢𝐞𝐝 𝐁𝐢𝐧𝐚𝐫𝐲 𝐒𝐞𝐚𝐫𝐜𝐡

13. 𝐁𝐢𝐭𝐰𝐢𝐬𝐞 𝐗𝐎𝐑

14. 𝐓𝐨𝐩 '𝐊' 𝐄𝐥𝐞𝐦𝐞𝐧𝐭𝐬

15. 𝐊-𝐰𝐚𝐲 𝐌𝐞𝐫𝐠𝐞

16. 𝐓𝐨𝐩𝐨𝐥𝐨𝐠𝐢𝐜𝐚𝐥 𝐒𝐨𝐫𝐭

17. 0/1 𝐊𝐧𝐚𝐩𝐬𝐚𝐜𝐤

18. 𝐅𝐢𝐛𝐨𝐧𝐚𝐜𝐜𝐢 𝐍𝐮𝐦𝐛𝐞𝐫𝐬

19. 𝐏𝐚𝐥𝐢𝐧𝐝𝐫𝐨𝐦𝐢𝐜 𝐒𝐮𝐛𝐬𝐞𝐪𝐮𝐞𝐧𝐜𝐞

20. 𝐋𝐨𝐧𝐠𝐞𝐬𝐭 𝐂𝐨𝐦𝐦𝐨𝐧 𝐒𝐮𝐛𝐬𝐭𝐫𝐢𝐧𝐠


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