https://www.1point3acres.com/bbs/thread-805786-1-1.html
Similar question: 某code 2115
Example.
input: recipe, a list of items
hamburger {
bread, steak}
bread {
flour，yeast}
steak {
beef, butter}
return a map of recipe, key is a recipe, value is its raw ingredients.
What are the ambiguities? How do we design the class?
Clarification
Ambiguities