human
Give me a code to count common characters in two strings and the other steps required given the following:
Count common characters in two strings | Function to return the count of valid indices pairs.
To store the frequencies of characters of string s1 and s2.
To store the count of valid pairs.
Update the frequencies of the characters of string s1.
Update the frequencies of the characters of string s2.
Find the count of valid pairs.
Driver code"
Solution in Python:
assistant
#Here is code to count common characters in two strings and the other steps required.
 def countPairs ( s1 , n1 , s2 , n2 ) :
	freq1 = [ 0 ] * 26 ;
	freq2 = [ 0 ] * 26 ;
	count = 0 ;
	for i in range ( n1 ) :
		freq1 [ ord ( s1 [ i ] ) - ord ( ' a ' ) ] += 1 ;
	for i in range ( n2 ) :
		freq2 [ ord ( s2 [ i ] ) - ord ( ' a ' ) ] += 1 ;
	for i in range ( 26 ) :
		count += min ( freq1 [ i ] , freq2 [ i ] ) ;
	return count ;
if __name__ == " _ _ main _ _ " :
	s1 = " geeksforgeeks " ;
	s2 = " platformforgeeks " ;
	n1 = len ( s1 ) ;
	n2 = len ( s2 ) ;
	print ( countPairs ( s1 , n1 , s2 , n2 ) ) ;