Recognize the pattern · Apply the template · Solve in minutes
Learn DSA by Pattern
Stop memorising solutions. Learn to recognise which pattern applies, then apply the template. 13 patterns · 107+ curated problems · Java code throughout.
13Patterns
107+Problems
5Hard Patterns
#01#02
🪟
Sliding Window
Process a window of elements that slides across an array or string.
0/10 solved0%
medium
👆👆
Two Pointers
Use two indices to scan from both ends or at different speeds.
0/7 solved0%
easy
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Full access to all 13 patterns, Java templates, and 107+ practice problems.
How to use this section
Pick a pattern, read the description and when-to-use signals, study the Java template, then solve problems in order of difficulty. Once you can write the template from memory you are ready for any interview question using that pattern.