algorithm - Big-O complexity for this loop -


What is the biggest complexity of the following loop: 

  for each vertical? ??? C do it for every top ??? C and V & gt; U do   
 What I'm doing here, imagine the following set {1,2,3,4} loop executes a function for all combinations of 2 elements of this number Is (1,2), (1,3), (1,4), (2,3), (2,4), (3,4).  
 Is it = (n ^ 2) where is the number of elements in n set?   
 
 
 Yes, this  o (n ^ 2) , recognizes the function implemented  O (1) , of course, and the iterator is also on the average repetition of  o (1)  (which is usually a valid assumption).  
 Note that if you also customize it further, then select  (n, 2)  elements, and select  (n, 2) = n ( N-1) / 2 , which is still  O (n ^ 2) .

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