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Pro
₹249₹199/ 30 days
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Real question images and more daily solutions for serious prep.
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Elite
₹399₹349/ 60 days
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Unlimited solutions for two months — the sweet spot for intensive prep.
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Yearly
₹1310₹1299/ 365 days
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A full year of unlimited access plus every future feature.
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Solution revamp in progress. Our Codeforces Candidate Masters are reviewing every solution — this may take a few more weeks. Questions that have already been verified show a Verified tag next to them.
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Feature Spotlight
AI Helper Agent
Your personal coding assistant that gives hints, debugs code, optimizes solutions, and generates test cases — right inside the editor.
AI Helper
Coding Assistant
Give me a hint for Two Sum
Think about complements.
For each
What data structure gives O(1) lookup?
For each
nums[i], the complement is target - nums[i].What data structure gives O(1) lookup?
A hash map!
Exactly! Iterate once, store seen values.
Time: O(n), Space: O(n)
Time: O(n), Space: O(n)
HintDebugOptimizeTestsExplain
Medium
Ask about this problem...
Smart Hints
Get progressive hints that guide you toward the solution without spoiling it. Start conceptual, get specific only when you ask.
Debug & Optimize
Paste your code and get instant bug analysis, edge case detection, and time/space complexity improvements.
4 Thinking Modes
Choose Minimal for quick answers, or High for deep analysis. You control the depth — and the credit cost.
Highlight to Ask
Select any code or problem text — a floating button lets you ask AI Helper about it instantly.
Credits by Plan
Basic
100
credits
₹99 / 15 days
Pro
200
credits
₹199 / 30 days
Elite
300
credits
₹349 / 60 days
Yearly
1,500
credits
₹1299 / 365 days
Each AI Helper interaction uses a small number of credits based on thinking mode depth.
Feature Spotlight
What are "Real Images"?
We provide original photos of the questions so you see exactly what was asked in the test, including diagrams and formatting.
Free / Basic
Locked
Image content hidden
Standard users see blurred placeholders.
Pro / Yearly
Premium
ORIGINAL
Premium users see the crystal clear original images.