beta

Belt & badges.

Every lesson, problem and daily solve earns Bits. Bits move you up the belts, from White to Black. Belts show how far you have come; they never lock anything.

My stats →

Your belt

White belt0 Bits

300 Bits to the Yellow belt.

Everyone starts here.

The belts

White0+Everyone starts here.
Yellow300+Your first lessons and problems.
Orange1,500+The toolkit and the first structures.
Green4,000+Core data structures in hand.
Blue8,000+Algorithms and patterns, solved for real.
Brown14,000+The launch course, done.
Black35,000+Near everything in DSA Mastery.

Mastery badges

0 earned

Finish every lesson, practice problem and checkpoint in a module to earn its badge. Earn every module badge in a world for the world badge.

Academy

world badge · +300 Bits

1.1Toolkit
Coming soon: still being written
1.2Complexity
Coming soon: still being written
2.1Arrays and strings
Coming soon: still being written
2.2Hashing
0 of 38 · +50 Bits
2.3Linked lists
0 of 19 · 3 more coming · +50 Bits
2.4Stacks
0 of 22 · +50 Bits
2.5Queues and deques
0 of 8 · 3 more coming · +50 Bits
2.6Trees and binary search trees
0 of 21 · 4 more coming · +50 Bits
2.7Heaps and priority queues
0 of 10 · 2 more coming · +50 Bits
2.8Graphs
0 of 8 · +50 Bits
2.9Tries
0 of 8 · +50 Bits
3.1Recursion
Coming soon: still being written
3.2Sorting
Coming soon: still being written
3.3Binary search
0 of 25 · 3 more coming · +50 Bits
3.4BFS and DFS
0 of 7 · 3 more coming · +50 Bits
3.5Shortest paths
0 of 8 · +50 Bits
3.6Topological sort
0 of 8 · +50 Bits
3.7Union-find
0 of 8 · +50 Bits
3.8Greedy
0 of 8 · 4 more coming · +50 Bits
3.9Dynamic programming
0 of 8 · 7 more coming · +50 Bits
3.10String basics
0 of 1 · +50 Bits
3.11Bits and maths
0 of 1 · +50 Bits
3.12Range queries
Coming soon: still being written
4.1Two pointers
0 of 27 · +50 Bits
4.2Sliding window
0 of 28 · +50 Bits

Interview practice

world badge · +300 Bits

District 1Arrays & Hashing
0 of 28 · 20 more coming · +50 Bits
District 2Two Pointers & Windows
0 of 24 · 22 more coming · +50 Bits
District 3Sorting & Intervals
0 of 26 · 22 more coming · +50 Bits
District 4Binary Search
0 of 26 · 14 more coming · +50 Bits
District 5Linked Lists
0 of 1 · 12 more coming · +50 Bits
District 6Stacks & Queues
0 of 2 · 9 more coming · +50 Bits
District 7Monotonic structures
0 of 4 · 8 more coming · +50 Bits
District 8Trees I
0 of 5 · 14 more coming · +50 Bits
District 9Trees II
0 of 1 · 13 more coming · +50 Bits
District 10Heaps
0 of 3 · 18 more coming · +50 Bits
District 11Graphs I
Coming soon: still being written
District 12Graphs II (topological sort, cycles)
Coming soon: still being written
District 13Shortest paths
Coming soon: still being written
District 14Union-find & MST
Coming soon: still being written
District 15Backtracking
Coming soon: still being written
District 16Greedy
Coming soon: still being written
District 17DP I and II
Coming soon: still being written
District 18DP III, Tries & Strings, Bits & Maths, Range Queries
Coming soon: still being written

Interview-ready

Finish interview rounds in a problem's Interview tab. A topic becomes Interview-ready after 3 rounds scoring 4 or more.

Where your Bits came from

How to earn Bits

Solve a problem (Easy · Medium · Hard): 10 · 20 · 40
…on your first submit: +5 · +10 · +20
…without opening a hint: +3 · +5 · +10
…after opening the editorial: a quarter of the base
Read a lesson beat · finish the lesson: 2 · 10
Pass a checkpoint quiz: 15
Pass a build-it lab: 30
Watch a lecture to the end: 10
Quick check right first time · dry run: 1 · 5
Explain it back (partly · solid): 5 · 10
Finish an interview round (scored 4+): 15 (25)
Today's daily problem: +5
Daily streak of 3, 7, 14, 30, 60, 100 days: 10, 25, 50, 100, 150, 250
Module badge · world badge: 50 · 300

Small print

Only Accepted solves count, once per problem. Every award counts once, however often you repeat it. Belts show progress only: nothing in DSA Mastery is ever locked. Bits are separate from System Design Mastery's XP.

Leaderboard

Bits earned since Monday, India time. A fresh start every week.

Names show as first name and initial for public profiles, otherwise as engineer-xxxx.

Belt & badges.

Every lesson, problem and daily solve earns Bits. Bits move you up the belts, from White to Black. Belts show how far you have come; they never lock anything.

My stats →

Your belt

White belt0 Bits

300 Bits to the Yellow belt.

Everyone starts here.

The belts

White0+Everyone starts here.
Yellow300+Your first lessons and problems.
Orange1,500+The toolkit and the first structures.
Green4,000+Core data structures in hand.
Blue8,000+Algorithms and patterns, solved for real.
Brown14,000+The launch course, done.
Black35,000+Near everything in DSA Mastery.

Mastery badges

0 earned

Finish every lesson, practice problem and checkpoint in a module to earn its badge. Earn every module badge in a world for the world badge.

Academy

world badge · +300 Bits

1.1Toolkit
Coming soon: still being written
1.2Complexity
Coming soon: still being written
2.1Arrays and strings
Coming soon: still being written
2.2Hashing
0 of 38 · +50 Bits
2.3Linked lists
0 of 19 · 3 more coming · +50 Bits
2.4Stacks
0 of 22 · +50 Bits
2.5Queues and deques
0 of 8 · 3 more coming · +50 Bits
2.6Trees and binary search trees
0 of 21 · 4 more coming · +50 Bits
2.7Heaps and priority queues
0 of 10 · 2 more coming · +50 Bits
2.8Graphs
0 of 8 · +50 Bits
2.9Tries
0 of 8 · +50 Bits
3.1Recursion
Coming soon: still being written
3.2Sorting
Coming soon: still being written
3.3Binary search
0 of 25 · 3 more coming · +50 Bits
3.4BFS and DFS
0 of 7 · 3 more coming · +50 Bits
3.5Shortest paths
0 of 8 · +50 Bits
3.6Topological sort
0 of 8 · +50 Bits
3.7Union-find
0 of 8 · +50 Bits
3.8Greedy
0 of 8 · 4 more coming · +50 Bits
3.9Dynamic programming
0 of 8 · 7 more coming · +50 Bits
3.10String basics
0 of 1 · +50 Bits
3.11Bits and maths
0 of 1 · +50 Bits
3.12Range queries
Coming soon: still being written
4.1Two pointers
0 of 27 · +50 Bits
4.2Sliding window
0 of 28 · +50 Bits

Interview practice

world badge · +300 Bits

District 1Arrays & Hashing
0 of 28 · 20 more coming · +50 Bits
District 2Two Pointers & Windows
0 of 24 · 22 more coming · +50 Bits
District 3Sorting & Intervals
0 of 26 · 22 more coming · +50 Bits
District 4Binary Search
0 of 26 · 14 more coming · +50 Bits
District 5Linked Lists
0 of 1 · 12 more coming · +50 Bits
District 6Stacks & Queues
0 of 2 · 9 more coming · +50 Bits
District 7Monotonic structures
0 of 4 · 8 more coming · +50 Bits
District 8Trees I
0 of 5 · 14 more coming · +50 Bits
District 9Trees II
0 of 1 · 13 more coming · +50 Bits
District 10Heaps
0 of 3 · 18 more coming · +50 Bits
District 11Graphs I
Coming soon: still being written
District 12Graphs II (topological sort, cycles)
Coming soon: still being written
District 13Shortest paths
Coming soon: still being written
District 14Union-find & MST
Coming soon: still being written
District 15Backtracking
Coming soon: still being written
District 16Greedy
Coming soon: still being written
District 17DP I and II
Coming soon: still being written
District 18DP III, Tries & Strings, Bits & Maths, Range Queries
Coming soon: still being written

Interview-ready

Finish interview rounds in a problem's Interview tab. A topic becomes Interview-ready after 3 rounds scoring 4 or more.

Where your Bits came from

How to earn Bits

Solve a problem (Easy · Medium · Hard): 10 · 20 · 40
…on your first submit: +5 · +10 · +20
…without opening a hint: +3 · +5 · +10
…after opening the editorial: a quarter of the base
Read a lesson beat · finish the lesson: 2 · 10
Pass a checkpoint quiz: 15
Pass a build-it lab: 30
Watch a lecture to the end: 10
Quick check right first time · dry run: 1 · 5
Explain it back (partly · solid): 5 · 10
Finish an interview round (scored 4+): 15 (25)
Today's daily problem: +5
Daily streak of 3, 7, 14, 30, 60, 100 days: 10, 25, 50, 100, 150, 250
Module badge · world badge: 50 · 300

Small print

Leaderboard

Bits earned since Monday, India time. A fresh start every week.

Names show as first name and initial for public profiles, otherwise as engineer-xxxx.