human
Minimum steps to delete a string by deleting substring comprising of same characters | Function to return the minimum number of delete operations.
When a single character is deleted.
When a group of consecutive characters are deleted if any of them matches.
When both the characters are same then delete the letters in between them.
Memoize.
Driver code"
How can the above be solved in Python?
 ... What is a code to minimum steps to delete a string by deleting substring comprising of same characters and the other steps required?
assistant
#Here is code to minimum steps to delete a string by deleting substring comprising of same characters and the other steps required.
 def findMinimumDeletion ( l , r , dp , s ) :
	if l > r :
		return 0
	if l == r :
		return 1
	if dp [ l ] [ r ] != - 1 :
		return dp [ l ] [ r ]
	res = 1 + findMinimumDeletion ( l + 1 , r , dp , s )
	for i in range ( l + 1 , r + 1 ) :
		if s [ l ] == s [ i ] :
			res = min ( res , findMinimumDeletion ( l + 1 , i - 1 , dp , s ) + findMinimumDeletion ( i , r , dp , s ) )
	dp [ l ] [ r ] = res
	return res
if __name__ == " _ _ main _ _ " :
	s = " abcddcba "
	n = len ( s )
	N = 10
	dp = [ [ - 1 for i in range ( N ) ] for j in range ( N ) ]
	print ( findMinimumDeletion ( 0 , n - 1 , dp , s ) )