Developer

This experience deserves a bigger screen

The DSA Visualizer is designed for deep focus,
side-by-side code, and real-time execution insight.

On small screens, that level of clarity can't be preserved.

Open on a tablet (landscape) or desktop for the intended experience.

Desktop experience preview

Implement strStrStep-by-Step Visualization

Find substring in string.

Problem Statement

Find first occurrence of needle in haystack.

Approach

Sliding window comparison. Or KMP for O(n+m).

Time & Space Complexity

Time O(n×m) naive, O(n+m) KMP.

Interactive Visualization

Loading Interactive Visualizer...

Click "Play" or use arrow keys to step through the execution.