Function to check whether it is possible or not to move from ( 0 , 0 ) to ( x , y ) in exactly n steps
def Arrive ( a , b , n ) : NEW_LINE INDENT if ( n >= abs ( a ) + abs ( b ) and ( n - ( abs ( a ) + abs ( b ) ) ) % 2 == 0 ) : NEW_LINE INDENT return True NEW_LINE DEDENT return False NEW_LINE DEDENT