GUIDED PRACTICE

Two pointers

Use order to eliminate impossible candidates.

A AceYourInterviews editorial · 6 min study

6:00Self-guided practice timer

The timer resets when you leave this page. Save your design separately.

Your challenge

Solve sorted two-sum in O(n) time and O(1) extra space.

Your design draft

Clarify assumptions, explain your approach, and test the difficult cases. Save your draft, then compare it with the study notes.

Self-review checklist

I clarified the requirements and constraints.I explained why the approach works.I considered failures, boundaries, and alternatives.I identified one improvement for my next attempt.

Self-guided practice. Automated AI feedback and code execution are not connected.