human
Give me a code to minimize cost to empty a given string by removing characters alphabetically and the other steps required given the following:
Minimize cost to empty a given string by removing characters alphabetically | Function to find the minimum cost required to remove each character of the string in alphabetical order.
Stores the frequency of characters of the string.
Iterate through the string.
Count the number of characters smaller than the present character.
If no smaller character precedes current character.
Increase the frequency of the current character.
Return the total cost.
Given string str.
Function call"
How can the above be solved in Python?
assistant
#Here is code to minimize cost to empty a given string by removing characters alphabetically and the other steps required.
 def minSteps ( str , N ) :
	cost = 0
	f = [ 0 ] * 26
	for i in range ( N ) :
		curr_ele = ord ( str [ i ] ) - ord ( ' a ' )
		smaller = 0
		for j in range ( curr_ele + 1 ) :
			if ( f [ j ] ) :
				smaller += f [ j ]
		if ( smaller == 0 ) :
			cost += ( i + 1 )
		else :
			cost += ( i - smaller + 1 )
		f [ ord ( str [ i ] ) - ord ( ' a ' ) ] += 1
	return cost
str = " abcab "
N = len ( str )
print ( minSteps ( str , N ) )