human
Lexicographically largest string possible for a given cost of appending characters | Function to find the lexicographically largest string possible.
If sum is less than 0.
If sum is equal to 0.
If sum is less than 0.
Add current character.
Check if selecting current character generates lexicographically largest string.
Backtrack if solution not found.
Find the lexicographically largest string excluding the current character.
Function to print the lexicographically largest string generated.
Function call.
Stores the string.
Print the lexicographically largest string formed.
Driver code.
Cost of adding each alphabet.
Cost of generating the string"
Solution in Python:

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Write me a code to lexicographically largest string possible for a given cost of appending characters and the other steps required?
assistant
#Here is code to lexicographically largest string possible for a given cost of appending characters and the other steps required.
 def lexi_largest_string ( a , i , sum , v ) :
	if ( sum < 0 ) :
		return False
	if ( sum == 0 ) :
		return True
	if ( i < 0 ) :
		return False
	v . append ( i )
	if ( lexi_largest_string ( a , i , sum - a [ i ] , v ) ) :
		return True
	v . pop ( - 1 )
	return lexi_largest_string ( a , i - 1 , sum , v )
def generateString ( a , sum ) :
	v = [ ]
	lexi_largest_string ( a , 25 , sum , v )
	s = " "
	for j in range ( len ( v ) ) :
		s += chr ( v [ j ] + ord ( ' a ' ) )
	print ( s )
if __name__ == ' _ _ main _ _ ' :
	a = [ 1 , 1 , 2 , 33 , 4 , 6 , 9 , 7 , 36 , 32 , 58 , 32 , 28 , 904 , 22 , 255 , 47 , 69 , 558 , 544 , 21 , 36 , 48 , 85 , 48 , 58 ]
	sum = 236
	generateString ( a , sum )