# Crossing the Bridge Alice, Bob, Carrie, and Dan have to cross a rickety bridge. The bridge can only hold two people at a time. They also have a flashlight, and one person on the bridge must be always holding the flashlight. Alice can cross the bridge in 1 minute, Bob can cross the bridge in 2 minutes, Carrie can cross the bridge in 5 minutes, and Dan can cross the bridge in 10 minutes. What is the fastest amount of time that all four of them can cross the bridge? * This problem has no tricks, no one is carrying another person, dragging them, running, etc. * There is a good answer and a best answer * You are as fast as the slowest person on the bridge --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://www.pythonclassroom.com/python-curriculum-map/pedagogy/activities/crossing-the-bridge.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.