LISP Funcs, Common Lisp

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;gnu clisp  2.49.60

; ЛР 5, 1
(defun lstLength (lst) 
     (cond ((null lst) 0)
           (t (+ 1 (lstLength (cdr lst))))    
     )
)

; ЛР 5, 2
(defun isMember (n lst)
    (cond ((null lst) NIL)
          ((atom (car lst)) 
              (cond ((eq (car lst) n) T)
                    (t (isMember n (cdr lst)))
              )
          )
          (t 
              (cond ((isMember n (car lst)) T)
                    (t (isMember n (cdr lst)))
              )          
          )  
    ) 
)

; ЛР 5, 3
(defun fibonacciNum (n)
    (cond ((eq n 0) 0)
          ((eq n 1) 1)
          (t (+ (fibonacciNum (- n 1)) (fibonacciNum (- n 2))))
    )
)

; ЛР 5, 4
(defun invers (lst)
    (cond ((null lst) ())
          (t (append (invers (cdr lst)) (list (car lst))))
    )
)

; ЛР 5, 5
(defun makeList (n x)
    (cond ((eq n 0) ())
          ((eq n 1) (list x))
          (t (cons x (makeList (- n 1) x)))
    )    
)

; ЛР 6, 6
;(listElSum '(() 15 (5) (11 (()))))
(defun listElSum (lst)
    (cond ((null lst) 0)
          ((atom (car lst)) 
              (cond ((null (car lst)) (+ 0 (listElSum (cdr lst))))
                    (t (+ (car lst) (listElSum (cdr lst))))
              )
          )
          (t (+ (listElSum (car lst)) (listElSum (cdr lst))))
    )
)

; ЛР 6, 1 
(defun floatSum (lst) 
    (cond ((null lst) 0)
          ((atom (car lst))
		      (cond ((floatp (car lst)) (+ (car lst) (floatSum (cdr lst))))
				    (t (floatSum (cdr lst)))
			  )
		  )
          (t (+ (floatSum (car lst)) (floatSum (cdr lst))))
    )
)

; ЛР 6, 2
(defun isRepeat (el lst)
    (cond ((null lst) NIL)
          ((eq el (car lst)) t)
          (t (isRepeat el (cdr lst)))
    )
)

(defun lstInverse (lst)
    (cond ((null lst) ())
          ((listp (car lst)) (append (lstInverse (cdr lst)) (lstInverse (car lst))))
          ((isRepeat (car lst) (cdr lst)) (append (lstInverse (cdr lst)) ()))
          (t (append (lstInverse (cdr lst)) (list (car lst))))
    )
)

; Бонус, 3
(defun romAnalog (n)
    (cond ((eq n 1) 'I)
          ((eq n 2) 'II)
          ((eq n 3) 'III)
          ((eq n 4) 'IV)
          ((eq n 5) 'V)
          ((eq n 6) 'VI)
          ((eq n 7) 'VII)
          ((eq n 8) 'VIII)
          ((eq n 9) 'IX)
          (t ())
    )    
)

(defun chToRom (lst)
    (cond ((null lst) ())
          (t (cons (romAnalog (car lst)) (chToRom (cdr lst))))
    )
)

; Бонус, 5
(defun delRepeatNeighbor (lst)
    (cond ((null lst) ())
          ((listp (car lst))
              (append (delRepeatNeighbor (car lst)) (delRepeatNeighbor (cdr lst)))
          )
          (t
              (cond ((eq (car lst) (cadr lst)) (append () (delRepeatNeighbor (cdr lst))))
                    (t (cons (car lst) (delRepeatNeighbor (cdr lst))))
              )
          )
    )
)

; Бонус, 6
(defun square (lst) 
    (cond ((null lst) ())
          ((listp (car lst)) (append (square (car lst)) (square (cdr lst))))
          (t (cons (* (car lst) (car lst)) (square (cdr lst))))
    )    
)

(print
 (delRepeatNeighbor '(2 -1 4 4 -9 -1))
)

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Absolute running time: 0.17 sec, cpu time: 0.03 sec, memory peak: 6 Mb, absolute service time: 0,22 sec