Problem Statement  
It is a common mistake to sort numbers as strings. For example, a sorted sequence like {"1", "174", "23", "578", "71", "9"} is not correctly sorted if its elements are interpreted as numbers rather than strings. You will be given a String[] sequence that is sorted in nondescending order using string comparison. Return this sequence sorted in nondescending order using numerical comparison instead.  
Definition  
 
Constraints  
  sequence will contain between 2 and 50 elements inclusive.  
  Each element of sequence will contain between 1 and 9 characters inclusive.  
  Each element of sequence will consist of only digits ('0''9').  
  Each element of sequence will not start with a '0' digit.  
  sequence will be ordered lexicographically.  
Examples  
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