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Check if two same sub | Function to check if similar subsequences occur in a string or not.
iterate and count the frequency.
counting frequency of the letters.
check if frequency is more than once of any character.
Driver Code"
Solution in Python:
assistant
#Here is code to check if two same sub and the other steps required.
 def check ( s , l ) :
	freq = [ 0 for i in range ( 26 ) ]
	for i in range ( l ) :
		freq [ ord ( s [ i ] ) - ord ( ' a ' ) ] += 1
	for i in range ( 26 ) :
		if ( freq [ i ] >= 2 ) :
			return True
	return False
if __name__ == ' _ _ main _ _ ' :
	s = " geeksforgeeks "
	l = len ( s )
	if ( check ( s , l ) ) :
		print ( " YES " )
	else :
		print ( " NO " )