ChaiComet

Stuck on a coding problem? Get it explained in one keystroke.

ChaiComet reads the problem on your screen and walks you through the approach, the code and the complexity, so you actually learn the pattern instead of copying an answer.

Try ChaiComet free

No card needed

Free to try. Then a one-time $20, no subscription. Credits last a year.

Practice shouldn't mean staring at the screen for an hour

  • You've been stuck for 40 minutes and the discussion tab just gives you code with no explanation.
  • Copy-pasting problems into ChatGPT loses the formatting and the constraints.
  • Premium explanation plans charge every month, even in the weeks you don't practice.

Three steps, no copy-paste

  1. 1Open any problem: LeetCode, HackerRank, a PDF or a screenshot.
  2. 2Press the ChaiComet shortcut.
  3. 3Read the approach, the code and the Big-O, right next to the problem.

Here's what an explanation looks like

Pattern

Hash map lookup.

Idea

For each number, check whether target minus the number has been seen. Store each number's index as you go.

Code

def two_sum(nums, target):
    seen = {}
    for i, num in enumerate(nums):
        need = target - num
        if need in seen:
            return [seen[need], i]
        seen[num] = i

Complexity

O(n) time, O(n) space.

Why not brute force

The nested loop is O(n²).

Try ChaiComet free

No card needed

  • Learn the pattern, not just the answer.

    Every explanation names the technique (sliding window, two pointers, DP…) so you recognise it next time.

  • Big-O on every answer.

    Time and space complexity, with the reason, every time.

  • Pay once, practice all semester.

    Free to try, then a one-time $20. No subscription, credits last a year.

Questions

Which sites does it work on?

Anything on your screen: LeetCode, HackerRank, Codeforces, PDFs, slides, screenshots.

Which languages?

Python, Java, C++, JavaScript and more. It follows the language shown on screen, or you can choose one.

Is it just giving me answers?

It explains the reasoning first, then the code, so you can redo it yourself.

How much does it cost?

Free to try with no card. After that, a one-time $20 pack with no subscription. Credits last a year.

Mac or Windows?

Both.

Your next stuck problem is one keystroke away.

Try ChaiComet free

No card needed