Two Pointers (visual)
Sorted array? Converge from both ends.
Teaching this in the lesson? Read the chapter.
Step 1 of 3
1. l=0, r=n-1
Two fingers on the array.
- [1 2 7 11]l at 0, r at 3
Prefer prose? Every animation has a matching chapter, listed above. Diagrams use text labels, so they read aloud with the listen button on the lesson page.