Difference between revisions of "Mock AIME 1 2006-2007 Problems/Problem 11"
(No difference)
|
Revision as of 15:45, 24 July 2006
11. Let 
be the set of strings with only 0's or 1's with length 
such that any 3 adjacent place numbers sum to at least 1. For example, 
works, but 
does not. Find the number of elements in 
.
