Restore the new numbers
f_n1 = 0 NEW_LINE f_n2 = 0 NEW_LINE for i in range ( l1 - 1 , - 1 , - 1 ) : NEW_LINE INDENT f_n1 = ( f_n1 * 10 ) + arr1 [ i ] NEW_LINE f_n2 = ( f_n2 * 10 ) + arr2 [ i ] NEW_LINE DEDENT