> #Attendence Q1:
> #Who was Gian-Carlo Rota
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> #Ans: He was one of the greatest mathmaticism in the world. And he was professor of MIT. 
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> #Attendence Q2:
> #Use in the internet to find the quotes of Rota about how userful pie exists
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> #Ans: "One of the most useful principles of enumeration in discrete probability and combinatorial theory is the celebrated principle of inclusion–exclusion. When skillfully applied, this principle has yielded the solution to many a combinatorial problem."
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> #Attendence Q3:
> #What does recontres mean in french? Who made the problem up? 
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> #Ans: Meeting.  PIERRE R~MOND DE MONTMORT
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> #Attendence Q4: 
> #What is the OEIS a number of this sequence? 0,1,2,9,44,265,1854,14833,133496,13334961...
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> #Ans: A166
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