DSAMind
For engineers who know the answer but blank in the room.

Practice DSA
without the noise.

LeetCode tells you pass/fail. NeetCode shows you the answer. Neither tells you why you froze when you knew it. We do.

Start PracticingSee the 20 patterns →
20 canonical patterns8 metrics per attempt6 named failure modes

Sketch the plan.

Before the editor unlocks, write the pattern, the algorithm in three lines, the complexity target, and the confidence. The interview moment starts here.

1. Approach
Pattern
two_pointer
Sketch
Lo + hi. Move lo when sum < target, hi when sum > target.
Target time
O(n)
Target space
O(1)
Confidence
1No idea
2Shaky
3Workable
4Solid
5Lock

Mark the moment you stall.

Three keys: Blank, Stuck, Lost. One tap, no modal — capture what your brain just did, then keep coding.

SignalsBlank⌘1Stuck⌘2Lost⌘3

Recorded silently with line number + timestamp. Re-rendered on the timeline.

A coach that names the failure.

The AI reads your sketch, your code, and your signals — then tells you which of pattern_mismatch, implementation_drift, or edge_case_blindness just happened.

Coach
What you got right

You named the pattern instantly and your O(n) target was correct.

Where it diverged
Implementation drift

Your sketch used two pointers, but the code reached for a nested loop.

Next attempt

→ Hold the sketched plan through one minute of doubt.

Twelve owned patterns = senior ready.

4
of 12 owned
two_pointer
sliding_window
hashmap
binary_search
bfs
graph_dfs
tree_dfs_bottom_up
topological_sort
heap
trie
dp_linear
dp_knapsack
Social Proof

Trusted by candidates landing tier-1 offers.

“The blank key is genius. I realized I was spending 6 minutes of absolute panic at the start of array problems. DSAMind forced me to sit with the pattern before coding.”

L
Lars K.
Senior Staff Engineer · Stripe

“Unlike regular sites that only check code correctness, the radar score on 'Plan ↔ Code Alignment' helped me identify why my code drifted from my initial algorithm.”

E
Elena M.
L5 Software Engineer · Google

“I used the 90-day Interview Pass. The failing-mode diagnostics (especially pattern_mismatch) gave me direct instructions on where my mathematical foundation was lacking.”

R
Ryan D.
Staff Engineer · Uber
Simple Pricing

Upgrade to unlock unlimited practice.

Your first 5 AI reviews are completely free. Upgrade anytime to continue your preparation with unlimited coaching.

Pro Monthly

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$9/ month
  • Unlimited AI feedback & reviews
  • All 20 pattern contracts unlocked
  • Complete attempt history
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Interview Pass

Popular

One-time purchase, 90 days access.

$29one-time
  • 90 days of unlimited AI reviews
  • No recurring subscription
  • Ideal for active recruiting seasons
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Stop blanking in interviews.

Start your first attempt — the loop is the same for problem #1 and problem #1000.

Start Practicing