Problem Statement  
Given an int, bound, consider the infinite set of all reduced fractions whose numerator is a positive integer and whose denominator is a positive integer less than or equal to bound. Now, find the N^{th} smallest (indexed from 1) fraction and return it as a String in the form "a/b", with no leading zeros in either integer. See example 0 for further clarifications.  
Definition  
 
Notes  
  A reduced fraction is one of the form a/b for which there is no integer g > 1 such that both a and b are divisible by g.  
Constraints  
  N will be between 1 and 2,000,000,000, inclusive.  
  bound will be between 1 and 1000, inclusive.  
Examples  
0)  
 
1)  
 
2)  
 
3)  
