Code solver - AI Code Debugging and C++ Problem Helper

Example

You paste: for (int i = 0; i <= v.size(); i++) sum += v[i]; and say the program sometimes crashes. The reply points out that i <= v.size() reads one element past the end of the vector and changes the condition to i < v.size().

Scenario

A typical answer has three parts: the cause in one or two sentences, the corrected code, and why the fix works. Include the exact error message and a sample input so the explanation matches what you actually see.

Example

"Explain how Dijkstra's algorithm finds the shortest path, then show a C++ version with a priority queue."

Scenario

Useful before an exam or a coding interview: ask for the idea in plain words first, then the code, then a small graph traced step by step.

Example

"Walk me through the 0/1 knapsack problem: the state, the transition, and a C++ solution."

Scenario

The GPT can lay out what each table cell means and how it is filled. Ask it to run the solution on a tiny input by hand so you can check the logic yourself.

Example

You paste a bubble sort on a large array; it suggests std::sort and explains the change from O(n²) to O(n log n) comparisons.

Scenario

Ask for the time and memory complexity of both versions, and keep your original as a reference when you test that the output is still the same.