This visualization animates the execution of tourist’s C++ solution for Google Code Jam’s “what is this omg” problem. It shows the code’s built-in graph, forest, DFS, LCA, and heavy-light decomposition classes processing a tree, with the code flow traced line by line. The view uses a custom renderer to draw the tree nodes and edges, highlighting visited vertices and their traversal order. The source gist by Restuta provides the code, which relies on standard C++ templates for graph algorithms rather than any external visualization library.