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Count of pairs having each element equal to index of the other from an Array | Function to print the count of pair.
Iterate over all the elements of the array.
Increment the count.
Print the result.
Driver Code"
Solution in Python:
assistant
#Here is code to count of pairs having each element equal to index of the other from an Array and the other steps required.
 def countPairs ( N , arr ) :
	count = 0
	for i in range ( N ) :
		if ( i == arr [ arr [ i ] - 1 ] - 1 ) :
			count += 1
	print ( count // 2 )
if __name__ == " _ _ main _ _ " :
	arr = [ 2 , 1 , 4 , 3 ]
	N = len ( arr )
	countPairs ( N , arr )