Neha contributed to the GDG-IGDTUW/DSA-1 repository by implementing an efficient algorithm in C++ to compute the largest rectangle area in a histogram, addressing a classic data structure and algorithm challenge. She designed a linear-time O(n) solution using a stack, optimizing both performance and resource usage for maximal rectangle area calculations. Neha also created and updated comprehensive documentation in HistogramReadme.md, detailing algorithm usage and complexity, which improved repository maintainability and clarity for future contributors. Her work demonstrated strong skills in C++, algorithm design, and data structures, laying a solid foundation for further enhancements to the project.