Question
Write a lisp program to check whether a binary tree is a Binary Search Tree. A Binary Search Tree (BST) is a tree in which all the nodes follow the below-mentioned properties:
- The left sub-tree of a node has a key less than or equal to its parent node's key.
- The right sub-tree of a node has a key greater than to its parent node's key.
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Q .2 -------

Lambda :

(setq V (list 2 6 8))
(setq VSquare (mapcar '(lambda (n) (* n n)) V))
(setq VSqrt (sqrt (+ (car VSquare) (cadr VSquare) (caddr VSquare))))

Iteration :

(setq V (list 2 6 8))
(setq i 0)
(setq sum 0)
(loop while (< i (length V)) do
   (setq sum ( + sum (* (nth i V) (nth i V))))
   (setq i (1+ i))
)
(print (sqrt sum))



Q.3 ------------

(defun SubProcessList(argList)
   (let ((len 0)(i 0))
       ; Anything within let stays local for defined variables .. which are len and i in this case
       (setq len (length argList))      
       (setq i 0)
       (loop while (< i len) do
          (setq item (nth i argList))
          (cond
               (
                  (listp item)
                  ; Check if the current item if is type list, Call SubProcessList recursivly
                  (SubProcessList item)
               )
               (
                  (symbolp item)
                  ; check if the current item is symbol
                  ; Append in finallst is the item is not a member in finallst
                  (if(null (member item finallst))
                   (setq finallst (append finallst (list item))))
                )
          )
          (setq i (1+ i))
       )
      finallst   
    )
)

(defun ProcessList (argList)
   (SETQ finallst NIL)
   (setq finallst(SubProcessList argList))
   (print finallst)
)

(setq lst '( (n) 2 (6 h 7.8) (w f) (n) (c) n) )
(ProcessList lst)

Q.4 -----



(defun even-indices-rec(argList argIndex)
      (cond
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8.1.0PHP Version944msRequest Duration45MBMemory UsageGET college-homework-library/{category}/{subject}/{id}Route
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        • 17. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 18. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
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        1.08mstwenty4_siteHomeworkLibraryController.php#97
        Backtrace
        • 21. app/Http/Controllers/HomeworkLibraryController.php:97
        • 22. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 23. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
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        5.78mstwenty4_siteHomeworkLibraryController.php#97
        Backtrace
        • 21. app/Http/Controllers/HomeworkLibraryController.php:97
        • 22. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 23. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
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        Backtrace
        • 20. app/Models/HomeworkLibrary/HomeworkLibrary.php:201
        • 26. app/Http/Controllers/HomeworkLibraryController.php:105
        • 27. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 28. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 29. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
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        Bindings
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        Backtrace
        • 14. app/Repositories/HomeworkLibraryRepository.php:30
        • 15. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
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        • 18. app/Repositories/HomeworkLibraryRepository.php:39
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      • select * from `subjects` where `subjects`.`id` in (460)
        1.43mstwenty4_siteHomeworkLibraryRepository.php#30
        Backtrace
        • 19. app/Repositories/HomeworkLibraryRepository.php:30
        • 20. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
        • 21. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:419
        • 23. app/Repositories/HomeworkLibraryRepository.php:39
        • 24. app/Http/Controllers/HomeworkLibraryController.php:139
      • select * from `solutionslibrary_files` where `solutionslibrary_files`.`solutionlib_id` = 49655 and `solutionslibrary_files`.`solutionlib_id` is not null and `publish` = 'question' order by `order` asc, `id` asc
        1.34mstwenty4_siteHomeworkLibrary.php#260
        Bindings
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        Backtrace
        • 15. app/Models/HomeworkLibrary/HomeworkLibrary.php:260
        • 16. app/Transformers/HomeworkLibrary/HomeworkLibraryTransformer.php:58
        • 19. vendor/league/fractal/src/TransformerAbstract.php:128
        • 20. vendor/league/fractal/src/TransformerAbstract.php:107
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        Backtrace
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        • 19. vendor/league/fractal/src/TransformerAbstract.php:128
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        5.85mstwenty4_siteHomeworkLibrary.php#260
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        Backtrace
        • 15. app/Models/HomeworkLibrary/HomeworkLibrary.php:260
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