human
Check whether a subsequence exists with sum equal to k if arr [ i ] > 2 * arr [ i | Function to check whether sum of any set of the array element is equal to k or not.
Traverse the array from end to start.
if k is greater than arr [ i ] then subtract it from k.
If there is any subsequence whose sum is equal to k.
Driver code"
Solution in Python:
 Write me a code to check whether a subsequence exists with sum equal to k if arr [ i ] > 2 * arr [ i and the other steps required?
assistant
#Here is code to check whether a subsequence exists with sum equal to k if arr [ i ] > 2 * arr [ i and the other steps required.
 def CheckForSequence ( arr , n , k ) :
	for i in range ( n - 1 , - 1 , - 1 ) :
		if ( k >= arr [ i ] ) :
			k -= arr [ i ] ;
	if ( k != 0 ) :
		return False ;
	else :
		return True ;
if __name__ == " _ _ main _ _ " :
	A = [ 1 , 3 , 7 , 15 , 31 ] ;
	n = len ( A ) ;
	if ( CheckForSequence ( A , n , 18 ) ) :
		print ( True )
	else :
		print ( False )