CCO Preparation Test 2 P3 - Subsets
View as PDFWhen Bruce learned set theory, he assigned a homework question to his students.
Given a positive integer , find the number of subsets of the whole set 
 that satisfies the following constraint: if an integer 
 is in the subset, then the integers 
 and 
 are not in the subset. For example, given 
, the whole set is 
. The number of subsets satisfying the constraint is 
, including the empty set: 
, 
, 
, 
, 
, 
, 
, and 
.
Input Specification
The input will consist of one integer  
.
Output Specification
Output the number of subsets that satisfy the above constraints mod  
.
Sample Input
4
Sample Output
8
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