Which data structure is typically used to implement the topological sort algorithm?

The data structure typically used to implement the topological sort algorithm is a Stack.

Here are the steps to implement the topological sort algorithm using a Stack:

1. Create an adjacency list to represent the graph.
2. Initialize a Stack and a boolean array visited[] to keep track of the visited nodes.
3. For every unvisited node in the graph, call the recursive helper function.
4. The helper function will mark the current node as visited and then recursively call the helper function for all its adjacent nodes.
5. After all adjacent nodes are visited, push the current node to the Stack.
6. Finally, print the contents of the stack. The order in which nodes are popped from the stack gives the topological sort of the graph.