text: Maximum sum from three arrays such that picking elements consecutively from same is not allowed | Function to return the maximum sum ; Base case ; Already visited ; If the element has been taken from first array in previous step ; If the element has been taken from second array in previous step ; If the element has been taken from third array in previous step ; Driver code ; Pick element from first array ; Pick element from second array ; Pick element from third array ; Print the maximum of them
code: def FindMaximumSum ( ind , kon , a , b , c , n , dp ) : NEW_LINE INDENT if ind == n : NEW_LINE INDENT return 0 NEW_LINE DEDENT if dp [ ind ] [ kon ] != - 1 : NEW_LINE INDENT return dp [ ind ] [ kon ] NEW_LINE DEDENT ans = - 10 ** 9 + 5 NEW_LINE if kon == 0 : NEW_LINE INDENT ans = max ( ans , b [ ind ] + FindMaximumSum ( ind + 1 , 1 , a , b , c , n , dp ) ) NEW_LINE ans = max ( ans , c [ ind ] + FindMaximumSum ( ind + 1 , 2 , a , b , c , n , dp ) ) NEW_LINE DEDENT elif kon == 1 : NEW_LINE INDENT ans = max ( ans , a [ ind ] + FindMaximumSum ( ind + 1 , 0 , a , b , c , n , dp ) ) NEW_LINE ans = max ( ans , c [ ind ] + FindMaximumSum ( ind + 1 , 2 , a , b , c , n , dp ) ) NEW_LINE DEDENT elif kon == 2 : NEW_LINE INDENT ans = max ( ans , a [ ind ] + FindMaximumSum ( ind + 1 , 1 , a , b , c , n , dp ) ) NEW_LINE ans = max ( ans , b [ ind ] + FindMaximumSum ( ind + 1 , 0 , a , b , c , n , dp ) ) NEW_LINE DEDENT dp [ ind ] [ kon ] = ans NEW_LINE return ans NEW_LINE DEDENT if __name__ == " _ _ main _ _ " : NEW_LINE INDENT N = 3 NEW_LINE a = [ 6 , 8 , 2 , 7 , 4 , 2 , 7 ] NEW_LINE b = [ 7 , 8 , 5 , 8 , 6 , 3 , 5 ] NEW_LINE c = [ 8 , 3 , 2 , 6 , 8 , 4 , 1 ] NEW_LINE n = len ( a ) NEW_LINE dp = [ [ - 1 for i in range ( N ) ] for j in range ( n ) ] NEW_LINE x = FindMaximumSum ( 0 , 0 , a , b , c , n , dp ) NEW_LINE y = FindMaximumSum ( 0 , 1 , a , b , c , n , dp ) NEW_LINE z = FindMaximumSum ( 0 , 2 , a , b , c , n , dp ) NEW_LINE print ( max ( x , y , z ) ) NEW_LINE DEDENT