IO
386 problems · 17 topics · real accounts, synced everywhere

Prepare for technical interviews like you're operating a system, not studying for an exam.

A structured DSA learning graph — topics, prerequisites, company frequency, and proven sheets — with progress that syncs across every device you sign in on.

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386Problems
17Topics
9Companies
5Sheets

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01Recursion
Progress0/25
8 14 3
6 subtopics
02Hashing
Progress0/7
2 5 0
1 subtopics
03Sorting
Progress0/5
3 2 0
2 subtopics
04Arrays
Progress0/41
17 23 1
5 subtopics
05Binary Search
Progress0/32
8 15 9
3 subtopics
06Bit Manipulation
Progress0/11
7 4 0
2 subtopics

Prep by Company

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Amazon
Amazon284 problems tagged
49 176 59
Microsoft
Microsoft165 problems tagged
37 103 25
Google
Google146 problems tagged
16 86 44
Meta
Meta76 problems tagged
13 51 12
Adobe
Adobe11 problems tagged
4 6 1
Apple
Apple4 problems tagged
3 1 0

Curated Sheets

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StriverA2Z
Progress0/143
51 69 23
NeetCode150
Progress0/133
24 85 24
Blind75
Progress0/47
13 29 5
TopInterview150
Progress0/34
9 23 2
Grind75
Progress0/9
6 3 0

Every problem, organized as a learning graph.

Prerequisites tell you what to learn first. Similar problems reinforce patterns. Company tags tell you what matters most for your target role.

Explore the full problem list