human
Count of index pairs with equal elements in an array | Set 2 | Function that counts the pair in the array arr [ ].
Sort the array.
Initialize two pointers.
Add all valid pairs to answer.
Return the answer.
Driver Code.
Given array arr [ ].
Function call"
Solution in Python:
 ... Can you provide a code to count of index pairs with equal elements in an array and the other steps required?
assistant
#Here is code to count of index pairs with equal elements in an array and the other steps required.
 def countPairs ( arr , n ) :
	ans = 0
	arr . sort ( )
	left = 0
	right = 1 ;
	while ( right < n ) :
		if ( arr [ left ] == arr [ right ] ) :
			ans += right - left ;
		else :
			left = right ;
		right += 1
	return ans
if __name__ == " _ _ main _ _ " :
	arr = [ 2 , 2 , 3 , 2 , 3 ]
	N = len ( arr )
	print ( countPairs ( arr , N ) )