Duzy commit ze smieciami

14 files changed, 0 insertions, 1213 deletions

diff --git a/Semestr 2/racket/lista6/lista8/kappa.py b/Semestr 2/racket/lista6/lista8/kappa.py
deleted file mode 100644
index f359d5c..0000000
--- a/Semestr 2/racket/lista6/lista8/kappa.py
+++ /dev/null
@@ -1,13 +0,0 @@
-import pylab 

-

-a = int(input("podaj liczbe: "))

-b = int(input("podaj liczbe: "))

-

-x = range(-10, 11) 

-y = [] 

-for i in x: 

-    y.append(a * i + b) 

-pylab.plot(x, y) 

-pylab.title('Wykres f(x) = a*x - b') 

-pylab.grid(True) 

-pylab.show()

diff --git a/Semestr 2/racket/lista6/lista8/zad1.bak b/Semestr 2/racket/lista6/lista8/zad1.bak
deleted file mode 100644
index 0960f21..0000000
--- a/Semestr 2/racket/lista6/lista8/zad1.bak
+++ /dev/null
@@ -1,98 +0,0 @@
-#lang racket
-
-; Do let-env.rkt dodajemy wartosci boolowskie
-;
-; Miejsca, ktore sie zmienily oznaczone sa przez !!!
-
-; --------- ;
-; Wyrazenia ;
-; --------- ;
-
-(struct const    (val)      #:transparent)
-(struct binop    (op l r)   #:transparent)
-(struct var-expr (id)       #:transparent)
-(struct let-expr (id e1 e2) #:transparent)
-(struct if-expr  (eb et ef) #:transparent)
-
-(define (expr? e)
-  (match e
-    [(const n) (or (number? n) (boolean? n))] ; <----------------- !!!
-    [(binop op l r) (and (symbol? op) (expr? l) (expr? r))]
-    [(var-expr x) (symbol? x)]
-    [(let-expr x e1 e2)
-     (and (symbol? x) (expr? e1) (expr? e2))]
-    [(if-expr eb et ef) ; <--------------------------------------- !!!
-     (and (expr? eb) (expr? et) (expr? ef))]
-    [_ false]))
-
-(define (parse q)
-  (cond
-    [(number? q) (const q)]
-    [(eq? q 'true)  (const true)]  ; <---------------------------- !!!
-    [(eq? q 'false) (const false)] ; <---------------------------- !!!
-    [(symbol? q) (var-expr q)]
-    [(and (list? q) (eq? (length q) 3) (eq? (first q) 'let))
-     (let-expr (first (second q))
-               (parse (second (second q)))
-               (parse (third q)))]
-    [(and (list? q) (eq? (length q) 4) (eq? (first q) 'if)) ; <--- !!!
-     (if-expr (parse (second q))
-              (parse (third q))
-              (parse (fourth q)))]
-    [(and (list? q) (eq? (length q) 3) (symbol? (first q)))
-     (binop (first q)
-            (parse (second q))
-            (parse (third q)))]))
-
-(define (test-parse) (parse '(let [x (+ 2 2)] (+ x 1))))
-
-; ---------- ;
-; Srodowiska ;
-; ---------- ;
-
-(struct environ (xs))
-
-(define env-empty (environ null))
-(define (env-add x v env)
-  (environ (cons (cons x v) (environ-xs env))))
-(define (env-lookup x env)
-  (define (assoc-lookup xs)
-    (cond [(null? xs) (error "Unknown identifier" x)]
-          [(eq? x (car (car xs))) (cdr (car xs))]
-          [else (assoc-lookup (cdr xs))]))
-  (assoc-lookup (environ-xs env)))
-
-; --------- ;
-; Ewaluacja ;
-; --------- ;
-
-(define (value? v)
-  (or (number? v) (boolean? v)))
-
-(define (op->proc op)
-  (match op ['+ +] ['- -] ['* *] ['/ /] ['% modulo] ; <----------- !!!
-            ['= =] ['> >] ['>= >=] ['< <] ['<= <=]
-            ['and (lambda (x y) (and x y))]
-            ['or  (lambda (x y) (or  x y))]))
-
-(define (eval-env e env)
-  (match e
-    [(const n) n]
-    [(binop op l r) ((op->proc op) (eval-env l env)
-                                   (eval-env r env))]
-    [(let-expr x e1 e2)
-     (eval-env e2 (env-add x (eval-env e1 env) env))]
-    [(var-expr x) (env-lookup x env)]
-    [(if-expr eb et ef) (if (eval-env eb env) ; <----------------- !!!
-                            (eval-env et env)
-                            (eval-env ef env))]))
-
-(define (eval e) (eval-env e env-empty))
-
-(define program
-  '(if (or (< (% 123 10) 5)
-           true)
-       (+ 2 3)
-       (/ 2 0)))
-
-(define (test-eval) (eval (parse program)))
\ No newline at end of file
diff --git a/Semestr 2/racket/lista6/lista8/zad1.rkt b/Semestr 2/racket/lista6/lista8/zad1.rkt
deleted file mode 100644
index 1cd6b0b..0000000
--- a/Semestr 2/racket/lista6/lista8/zad1.rkt
+++ /dev/null
@@ -1,104 +0,0 @@
-#lang racket
-
-; Do let-env.rkt dodajemy wartosci boolowskie
-;
-; Miejsca, ktore sie zmienily oznaczone sa przez !!!
-
-; --------- ;
-; Wyrazenia ;
-; --------- ;
-
-(struct const        (val)        #:transparent)
-(struct binop        (op l r)     #:transparent)
-(struct var-expr     (id)         #:transparent)
-(struct let-expr     (id e1 e2)   #:transparent)
-(struct if-expr      (eb et ef)   #:transparent)
-
-(define (expr? e)
-  (match e
-    [(const n) (or (number? n) (boolean? n))] ; <----------------- !!!
-    [(binop op l r) (and (symbol? op) (expr? l) (expr? r))]
-    [(var-expr x) (symbol? x)]
-    [(let-expr x e1 e2)
-     (and (symbol? x) (expr? e1) (expr? e2))]
-    [(if-expr eb et ef) ; <--------------------------------------- !!!
-     (and (expr? eb) (expr? et) (expr? ef))]
-    [_ false]))
-
-(define (parse q)
-  (cond
-    [(number? q) (const q)]
-    [(eq? q 'true)  (const true)]  ; <---------------------------- !!!
-    [(eq? q 'false) (const false)] ; <---------------------------- !!!
-    [(symbol? q) (var-expr q)]
-    [(and (list? q) (eq? (length q) 3) (eq? (first q) 'let))
-     (let-expr (first (second q))
-               (parse (second (second q)))
-               (parse (third q)))]
-    [(and (list? q) (eq? (length q) 4) (eq? (first q) 'if)) ; <--- !!!
-     (if-expr (parse (second q))
-              (parse (third q))
-              (parse (fourth q)))]
-    [(and (list? q) (eq? (length q) 3) (eq? (first q) 'and))
-     (if-expr (parse (second q))
-              (parse (third q))
-              (const false))]
-    [(and (list? q) (eq? (length q) 3) (eq? (first q) 'or))
-     (if-expr (parse (second q))
-              (const true)
-              (parse (third q)))]
-    [(and (list? q) (eq? (length q) 3) (symbol? (first q)))
-     (binop (first q)
-            (parse (second q))
-            (parse (third q)))]))
-
-(define (test-parse) (parse '(let [x (+ 2 2)] (+ x 1))))
-
-; ---------- ;
-; Srodowiska ;
-; ---------- ;
-
-(struct environ (xs))
-
-(define env-empty (environ null))
-(define (env-add x v env)
-  (environ (cons (cons x v) (environ-xs env))))
-(define (env-lookup x env)
-  (define (assoc-lookup xs)
-    (cond [(null? xs) (error "Unknown identifier" x)]
-          [(eq? x (car (car xs))) (cdr (car xs))]
-          [else (assoc-lookup (cdr xs))]))
-  (assoc-lookup (environ-xs env)))
-
-; --------- ;
-; Ewaluacja ;
-; --------- ;
-
-(define (value? v)
-  (or (number? v) (boolean? v)))
-
-(define (op->proc op)
-  (match op ['+ +] ['- -] ['* *] ['/ /] ['% modulo] ; <----------- !!!
-            ['= =] ['> >] ['>= >=] ['< <] ['<= <=]))
-
-(define (eval-env e env)
-  (match e
-    [(const n) n]
-    [(binop op l r) ((op->proc op) (eval-env l env)
-                                   (eval-env r env))]
-    [(let-expr x e1 e2)
-     (eval-env e2 (env-add x (eval-env e1 env) env))]
-    [(var-expr x) (env-lookup x env)]
-    [(if-expr eb et ef) (if (eval-env eb env) ; <----------------- !!!
-                            (eval-env et env)
-                            (eval-env ef env))]))
-
-(define (eval e) (eval-env e env-empty))
-
-(define program
-  '(if (or (< (% 123 10) 5)
-           true)
-       (+ 2 3)
-       (/ 2 0)))
-
-(define (test-eval) (eval (parse program)))
\ No newline at end of file
diff --git a/Semestr 2/racket/lista6/lista8/zad4.bak b/Semestr 2/racket/lista6/lista8/zad4.bak
deleted file mode 100644
index 503099d..0000000
--- a/Semestr 2/racket/lista6/lista8/zad4.bak
+++ /dev/null
@@ -1,114 +0,0 @@
-#lang racket
-
-; Do boolean.rkt dodajemy pary
-;
-; Miejsca, ktore sie zmienily oznaczone sa przez !!!
-
-; --------- ;
-; Wyrazenia ;
-; --------- ;
-
-(struct const     (val)      #:transparent)
-(struct binop     (op l r)   #:transparent)
-(struct var-expr  (id)       #:transparent)
-(struct let-expr  (id e1 e2) #:transparent)
-(struct if-expr   (eb et ef) #:transparent)
-(struct cons-expr (e1 e2)    #:transparent) ; <------------------- !!!
-(struct car-expr  (e)        #:transparent) ; <------------------- !!!
-(struct cdr-expr  (e)        #:transparent) ; <------------------- !!!
-
-(define (expr? e)
-  (match e
-    [(const n) (or (number? n) (boolean? n))]
-    [(binop op l r) (and (symbol? op) (expr? l) (expr? r))]
-    [(var-expr x) (symbol? x)]
-    [(let-expr x e1 e2)
-     (and (symbol? x) (expr? e1) (expr? e2))]
-    [(if-expr eb et ef)
-     (and (expr? eb) (expr? et) (expr? ef))]
-    [(cons-expr e1 e2) (and (expr? e1) (expr? e2))] ; <----------- !!!
-    [(car-expr e) (expr? e)] ; <---------------------------------- !!!
-    [(cdr-expr e) (expr? e)] ; <---------------------------------- !!!
-    [_ false]))
-
-(define (parse q)
-  (cond
-    [(number? q) (const q)]
-    [(eq? q 'true)  (const true)]
-    [(eq? q 'false) (const false)]
-    [(symbol? q) (var-expr q)]
-    [(and (list? q) (eq? (length q) 3) (eq? (first q) 'cons)) ; <- !!!
-     (cons-expr (parse (second q))
-                (parse (third q)))]
-    [(and (list? q) (eq? (length q) 2) (eq? (first q) 'car)) ; <-- !!!
-     (car-expr (parse (second q)))]
-    [(and (list? q) (eq? (length q) 2) (eq? (first q) 'cdr)) ; <-- !!!
-     (cdr-expr (parse (second q)))]
-    [(and (list? q) (eq? (length q) 3) (eq? (first q) 'let))
-     (let-expr (first (second q))
-               (parse (second (second q)))
-               (parse (third q)))]
-    [(and (list? q) (eq? (length q) 4) (eq? (first q) 'if))
-     (if-expr (parse (second q))
-              (parse (third q))
-              (parse (fourth q)))]
-    [(and (list? q) (eq? (length q) 3) (symbol? (first q)))
-     (binop (first q)
-            (parse (second q))
-            (parse (third q)))]))
-
-(define (test-parse) (parse '(let [x (+ 2 2)] (+ x 1))))
-
-; ---------- ;
-; Srodowiska ;
-; ---------- ;
-
-(struct environ (xs))
-
-(define env-empty (environ null))
-(define (env-add x v env)
-  (environ (cons (cons x v) (environ-xs env))))
-(define (env-lookup x env)
-  (define (assoc-lookup xs)
-    (cond [(null? xs) (error "Unknown identifier" x)]
-          [(eq? x (car (car xs))) (cdr (car xs))]
-          [else (assoc-lookup (cdr xs))]))
-  (assoc-lookup (environ-xs env)))
-
-; --------- ;
-; Ewaluacja ;
-; --------- ;
-
-(define (value? v)
-  (or (number? v)
-      (boolean? v)
-      (and (pair? v) (value? (car v)) (value? (cdr v)))))
-
-(define (op->proc op)
-  (match op ['+ +] ['- -] ['* *] ['/ /] ['% modulo]
-            ['= =] ['> >] ['>= >=] ['< <] ['<= <=]
-            ['and (lambda (x y) (and x y))]
-            ['or  (lambda (x y) (or  x y))]))
-
-(define (eval-env e env)
-  (match e
-    [(const n) n]
-    [(binop op l r) ((op->proc op) (eval-env l env)
-                                   (eval-env r env))]
-    [(let-expr x e1 e2)
-     (eval-env e2 (env-add x (eval-env e1 env) env))]
-    [(var-expr x) (env-lookup x env)]
-    [(if-expr eb et ef) (if (eval-env eb env)
-                            (eval-env et env)
-                            (eval-env ef env))]
-    [(cons-expr e1 e2) (cons (eval-env e1 env) ; <---------------- !!!
-                             (eval-env e2 env))]
-    [(car-expr e) (car (eval-env e env))] ; <--------------------- !!!
-    [(cdr-expr e) (cdr (eval-env e env))])) ; <------------------- !!!
-
-(define (eval e) (eval-env e env-empty))
-
-(define program
-  '(car (if true (cons 1 2) false)))
-
-(define (test-eval) (eval (parse program)))
\ No newline at end of file
diff --git a/Semestr 2/racket/lista6/lista8/zad4.rkt b/Semestr 2/racket/lista6/lista8/zad4.rkt
deleted file mode 100644
index 7934435..0000000
--- a/Semestr 2/racket/lista6/lista8/zad4.rkt
+++ /dev/null
@@ -1,118 +0,0 @@
-#lang racket
-
-; Do boolean.rkt dodajemy pary
-;
-; Miejsca, ktore sie zmienily oznaczone sa przez !!!
-
-; --------- ;
-; Wyrazenia ;
-; --------- ;
-
-(struct const     (val)      #:transparent)
-(struct binop     (op l r)   #:transparent)
-(struct var-expr  (id)       #:transparent)
-(struct let-expr  (id e1 e2) #:transparent)
-(struct if-expr   (eb et ef) #:transparent)
-(struct cons-expr (e1 e2)    #:transparent) ; <------------------- !!!
-(struct car-expr  (e)        #:transparent) ; <------------------- !!!
-(struct cdr-expr  (e)        #:transparent) ; <------------------- !!!
-(struct is-pair   (e)        #:transparent)
-
-(define (expr? e)
-  (match e
-    [(const n) (or (number? n) (boolean? n))]
-    [(binop op l r) (and (symbol? op) (expr? l) (expr? r))]
-    [(var-expr x) (symbol? x)]
-    [(let-expr x e1 e2)
-     (and (symbol? x) (expr? e1) (expr? e2))]
-    [(if-expr eb et ef)
-     (and (expr? eb) (expr? et) (expr? ef))]
-    [(cons-expr e1 e2) (and (expr? e1) (expr? e2))] ; <----------- !!!
-    [(car-expr e) (expr? e)] ; <---------------------------------- !!!
-    [(cdr-expr e) (expr? e)] ; <---------------------------------- !!!
-    [(is-pair e)  (expr? e)]
-    [_ false]))
-
-(define (parse q)
-  (cond
-    [(number? q) (const q)]
-    [(eq? q 'true)  (const true)]
-    [(eq? q 'false) (const false)]
-    [(symbol? q) (var-expr q)]
-    [(and (list? q) (eq? (length q) 3) (eq? (first q) 'cons)) ; <- !!!
-     (cons-expr (parse (second q))
-                (parse (third q)))]
-    [(and (list? q) (eq? (length q) 2) (eq? (first q) 'car)) ; <-- !!!
-     (car-expr (parse (second q)))]
-    [(and (list? q) (eq? (length q) 2) (eq? (first q) 'cdr)) ; <-- !!!
-     (cdr-expr (parse (second q)))]
-    [(and (list? q) (eq? (length q) 3) (eq? (first q) 'let))
-     (let-expr (first (second q))
-               (parse (second (second q)))
-               (parse (third q)))]
-    [(and (list? q) (eq? (length q) 4) (eq? (first q) 'if))
-     (if-expr (parse (second q))
-              (parse (third q))
-              (parse (fourth q)))]
-    [(and (list? q) (eq? (length q) 3) (symbol? (first q)))
-     (binop (first q)
-            (parse (second q))
-            (parse (third q)))]
-    [(and (list? q) (eq? (length q) 2) (eq? (first q) 'pair?))
-     (is-pair (parse (second q)))]))
-
-(define (test-parse) (parse '(let [x (+ 2 2)] (+ x 1))))
-
-; ---------- ;
-; Srodowiska ;
-; ---------- ;
-
-(struct environ (xs))
-
-(define env-empty (environ null))
-(define (env-add x v env)
-  (environ (cons (cons x v) (environ-xs env))))
-(define (env-lookup x env)
-  (define (assoc-lookup xs)
-    (cond [(null? xs) (error "Unknown identifier" x)]
-          [(eq? x (car (car xs))) (cdr (car xs))]
-          [else (assoc-lookup (cdr xs))]))
-  (assoc-lookup (environ-xs env)))
-
-; --------- ;
-; Ewaluacja ;
-; --------- ;
-
-(define (value? v)
-  (or (number? v)
-      (boolean? v)
-      (and (pair? v) (value? (car v)) (value? (cdr v)))))
-
-(define (op->proc op)
-  (match op ['+ +] ['- -] ['* *] ['/ /] ['% modulo]
-            ['= =] ['> >] ['>= >=] ['< <] ['<= <=]
-            ['and (lambda (x y) (and x y))]
-            ['or  (lambda (x y) (or  x y))]))
-
-(define (eval-env e env)
-  (match e
-    [(const n) n]
-    [(binop op l r) ((op->proc op) (eval-env l env)
-                                   (eval-env r env))]
-    [(let-expr x e1 e2)
-     (eval-env e2 (env-add x (eval-env e1 env) env))]
-    [(var-expr x) (env-lookup x env)]
-    [(if-expr eb et ef) (if (eval-env eb env)
-                            (eval-env et env)
-                            (eval-env ef env))]
-    [(cons-expr e1 e2) (cons (eval-env e1 env) ; <---------------- !!!
-                             (eval-env e2 env))]
-    [(car-expr e) (car (eval-env e env))] ; <--------------------- !!!
-    [(cdr-expr e) (cdr (eval-env e env))] ; <------------------- !!!
-    [(is-pair e) (cons? (eval-env e env))]))
-(define (eval e) (eval-env e env-empty))
-
-(define program
-  '(car (if true (cons 1 2) false)))
-
-(define (test-eval) (eval (parse program)))
\ No newline at end of file
diff --git a/Semestr 2/racket/lista6/lista8/zad5.bak b/Semestr 2/racket/lista6/lista8/zad5.bak
deleted file mode 100644
index 6f1f7b4..0000000
--- a/Semestr 2/racket/lista6/lista8/zad5.bak
+++ /dev/null
@@ -1 +0,0 @@
-#lang racket
diff --git a/Semestr 2/racket/lista6/lista8/zad5.rkt b/Semestr 2/racket/lista6/lista8/zad5.rkt
deleted file mode 100644
index 721f5bf..0000000
--- a/Semestr 2/racket/lista6/lista8/zad5.rkt
+++ /dev/null
@@ -1,151 +0,0 @@
-#lang racket
-
-; Do list.rkt dodajemy procedury
-;
-; Miejsca, ktore sie zmienily oznaczone sa przez !!!
-
-; --------- ;
-; Wyrazenia ;
-; --------- ;
-
-(struct const      (val)      #:transparent)
-(struct binop      (op l r)   #:transparent)
-(struct unop       (op e)     #:transparent)
-(struct var-expr   (id)       #:transparent)
-(struct let-expr   (id e1 e2) #:transparent)
-(struct if-expr    (eb et ef) #:transparent)
-(struct cons-expr  (e1 e2)    #:transparent)
-(struct null-expr  ()         #:transparent)
-(struct null?-expr (e)        #:transparent)
-(struct app        (f e)      #:transparent) ; <------------------ !!!
-(struct lam        (id e)     #:transparent) ; <------------------ !!!
-
-
-(define (expr? e)
-  (match e
-    [(const n) (or (number? n) (boolean? n))]
-    [(binop op l r) (and (symbol? op) (expr? l) (expr? r))]
-    [(var-expr x) (symbol? x)]
-    [(let-expr x e1 e2)
-     (and (symbol? x) (expr? e1) (expr? e2))]
-    [(if-expr eb et ef)
-     (and (expr? eb) (expr? et) (expr? ef))]
-    [(cons-expr e1 e2) (and (expr? e1) (expr? e2))]
-    [(null-expr) true]
-    [(null?-expr e) (expr? e)]
-    [(app f e) (and (expr? f) (expr? e))] ; <--------------------- !!!
-    [(lam id e) (and (symbol? id) (expr? e))] ; <----------------- !!!
-    [_ false]))
-
-(define (parse q)
-  (cond
-    [(number? q) (const q)]
-    [(eq? q 'true)  (const true)]
-    [(eq? q 'false) (const false)]
-    [(eq? q 'null)  (null-expr)]
-    [(symbol? q) (var-expr q)]
-    [(and (list? q) (eq? (length q) 2) (eq? (first q) 'null?))
-     (null?-expr (parse (second q)))]
-    [(and (list? q) (eq? (length q) 3) (eq? (first q) 'cons))
-     (cons-expr (parse (second q))
-                (parse (third q)))]
-    [(and (list? q) (eq? (length q) 3) (eq? (first q) 'let))
-     (let-expr (first (second q))
-               (parse (second (second q)))
-               (parse (third q)))]
-    [(and (list? q) (eq? (length q) 4) (eq? (first q) 'if))
-     (if-expr (parse (second q))
-              (parse (third q))
-              (parse (fourth q)))]
-    [(and (list? q) (eq? (length q) 3) (eq? (first q) 'lambda)) ; <!!!
-     (parse-lam (second q) (third q))]
-    [(and (list? q) (pair? q) (not (op->proc (car q)))) ; <------- !!!
-     (parse-app q)]
-    [(and (list? q) (eq? (length q) 3) (symbol? (first q)))
-     (binop (first q)
-            (parse (second q))
-            (parse (third q)))]
-    [(and (list? q) (eq? (length q) 2) (symbol? (first q)))
-     (unop (first q) (parse (second q)))]))
-
-(define (parse-app q) ; <----------------------------------------- !!!
-  (define (parse-app-accum q acc)
-    (cond [(= 1 (length q)) (app acc (parse (car q)))]
-          [else (parse-app-accum (cdr q) (app acc (parse (car q))))]))
-  (parse-app-accum (cdr q) (parse (car q))))
-
-(define (parse-lam pat e) ; <------------------------------------- !!!
-  (cond [(= 1 (length pat))
-         (lam (car pat) (parse e))]
-        [else
-         (lam (car pat) (parse-lam (cdr pat) e))]))
-
-; ---------- ;
-; Srodowiska ;
-; ---------- ;
-
-(struct environ (xs) #:transparent)
-
-(define env-empty (environ null))
-(define (env-add x v env)
-  (environ (cons (cons x v) (environ-xs env))))
-(define (env-lookup x env)
-  (define (assoc-lookup xs)
-    (cond [(null? xs) (error "Unknown identifier" x)]
-          [(eq? x (car (car xs))) (cdr (car xs))]
-          [else (assoc-lookup (cdr xs))]))
-  (assoc-lookup (environ-xs env)))
-
-; --------- ;
-; Ewaluacja ;
-; --------- ;
-
-(struct clo (id e env) #:transparent) ; <------------------------- !!!
-
-(define (value? v)
-  (or (number? v)
-      (boolean? v)
-      (and (pair? v) (value? (car v)) (value? (cdr v)))
-      (null? v)
-      (clo? v))) ; <---------------------------------------------- !!!
-
-(define (op->proc op)
-  (match op ['+ +] ['- -] ['* *] ['/ /] ['% modulo]
-            ['= =] ['> >] ['>= >=] ['< <] ['<= <=]
-            ['and (lambda (x y) (and x y))]
-            ['or  (lambda (x y) (or  x y))]
-            ['not not] ['car car] ['cdr cdr]
-            [_ false])) ; <--------------------------------------- !!!
-
-(define (eval-env e env)
-  (match e
-    [(const n) n]
-    [(binop op l r) ((op->proc op) (eval-env l env)
-                                   (eval-env r env))]
-    [(unop op e) ((op->proc op) (eval-env e env))]
-    [(let-expr x e1 e2)
-     (eval-env e2 (env-add x (eval-env e1 env) env))]
-    [(var-expr x) (env-lookup x env)]
-    [(if-expr eb et ef) (if (eval-env eb env)
-                            (eval-env et env)
-                            (eval-env ef env))]
-    [(cons-expr e1 e2) (cons (eval-env e1 env)
-                             (eval-env e2 env))]
-    [(null-expr) null]
-    [(null?-expr e) (null? (eval-env e env))]
-    [(lam x e) (clo x e env)] ; <--------------------------------- !!!
-    [(app f e) ; <------------------------------------------------ !!!
-     (let ([vf (eval-env f env)]
-           [ve (eval-env e env)])
-       (match vf [(clo x body fun-env)
-                  (eval-env body (env-add x ve fun-env))]))]))
-
-(define (eval e) (eval-env e env-empty))
-
-(define program
-  '(let [twice (lambda (f x) (f (f x)))]
-   (let [inc (lambda (x) (+ 1 x))]
-     (twice twice twice twice inc 1))))
-    
-
-(define (test-eval) (eval (parse program)))
\ No newline at end of file
diff --git a/Semestr 2/racket/lista6/lista8/zad6.bak b/Semestr 2/racket/lista6/lista8/zad6.bak
deleted file mode 100644
index 721f5bf..0000000
--- a/Semestr 2/racket/lista6/lista8/zad6.bak
+++ /dev/null
@@ -1,151 +0,0 @@
-#lang racket
-
-; Do list.rkt dodajemy procedury
-;
-; Miejsca, ktore sie zmienily oznaczone sa przez !!!
-
-; --------- ;
-; Wyrazenia ;
-; --------- ;
-
-(struct const      (val)      #:transparent)
-(struct binop      (op l r)   #:transparent)
-(struct unop       (op e)     #:transparent)
-(struct var-expr   (id)       #:transparent)
-(struct let-expr   (id e1 e2) #:transparent)
-(struct if-expr    (eb et ef) #:transparent)
-(struct cons-expr  (e1 e2)    #:transparent)
-(struct null-expr  ()         #:transparent)
-(struct null?-expr (e)        #:transparent)
-(struct app        (f e)      #:transparent) ; <------------------ !!!
-(struct lam        (id e)     #:transparent) ; <------------------ !!!
-
-
-(define (expr? e)
-  (match e
-    [(const n) (or (number? n) (boolean? n))]
-    [(binop op l r) (and (symbol? op) (expr? l) (expr? r))]
-    [(var-expr x) (symbol? x)]
-    [(let-expr x e1 e2)
-     (and (symbol? x) (expr? e1) (expr? e2))]
-    [(if-expr eb et ef)
-     (and (expr? eb) (expr? et) (expr? ef))]
-    [(cons-expr e1 e2) (and (expr? e1) (expr? e2))]
-    [(null-expr) true]
-    [(null?-expr e) (expr? e)]
-    [(app f e) (and (expr? f) (expr? e))] ; <--------------------- !!!
-    [(lam id e) (and (symbol? id) (expr? e))] ; <----------------- !!!
-    [_ false]))
-
-(define (parse q)
-  (cond
-    [(number? q) (const q)]
-    [(eq? q 'true)  (const true)]
-    [(eq? q 'false) (const false)]
-    [(eq? q 'null)  (null-expr)]
-    [(symbol? q) (var-expr q)]
-    [(and (list? q) (eq? (length q) 2) (eq? (first q) 'null?))
-     (null?-expr (parse (second q)))]
-    [(and (list? q) (eq? (length q) 3) (eq? (first q) 'cons))
-     (cons-expr (parse (second q))
-                (parse (third q)))]
-    [(and (list? q) (eq? (length q) 3) (eq? (first q) 'let))
-     (let-expr (first (second q))
-               (parse (second (second q)))
-               (parse (third q)))]
-    [(and (list? q) (eq? (length q) 4) (eq? (first q) 'if))
-     (if-expr (parse (second q))
-              (parse (third q))
-              (parse (fourth q)))]
-    [(and (list? q) (eq? (length q) 3) (eq? (first q) 'lambda)) ; <!!!
-     (parse-lam (second q) (third q))]
-    [(and (list? q) (pair? q) (not (op->proc (car q)))) ; <------- !!!
-     (parse-app q)]
-    [(and (list? q) (eq? (length q) 3) (symbol? (first q)))
-     (binop (first q)
-            (parse (second q))
-            (parse (third q)))]
-    [(and (list? q) (eq? (length q) 2) (symbol? (first q)))
-     (unop (first q) (parse (second q)))]))
-
-(define (parse-app q) ; <----------------------------------------- !!!
-  (define (parse-app-accum q acc)
-    (cond [(= 1 (length q)) (app acc (parse (car q)))]
-          [else (parse-app-accum (cdr q) (app acc (parse (car q))))]))
-  (parse-app-accum (cdr q) (parse (car q))))
-
-(define (parse-lam pat e) ; <------------------------------------- !!!
-  (cond [(= 1 (length pat))
-         (lam (car pat) (parse e))]
-        [else
-         (lam (car pat) (parse-lam (cdr pat) e))]))
-
-; ---------- ;
-; Srodowiska ;
-; ---------- ;
-
-(struct environ (xs) #:transparent)
-
-(define env-empty (environ null))
-(define (env-add x v env)
-  (environ (cons (cons x v) (environ-xs env))))
-(define (env-lookup x env)
-  (define (assoc-lookup xs)
-    (cond [(null? xs) (error "Unknown identifier" x)]
-          [(eq? x (car (car xs))) (cdr (car xs))]
-          [else (assoc-lookup (cdr xs))]))
-  (assoc-lookup (environ-xs env)))
-
-; --------- ;
-; Ewaluacja ;
-; --------- ;
-
-(struct clo (id e env) #:transparent) ; <------------------------- !!!
-
-(define (value? v)
-  (or (number? v)
-      (boolean? v)
-      (and (pair? v) (value? (car v)) (value? (cdr v)))
-      (null? v)
-      (clo? v))) ; <---------------------------------------------- !!!
-
-(define (op->proc op)
-  (match op ['+ +] ['- -] ['* *] ['/ /] ['% modulo]
-            ['= =] ['> >] ['>= >=] ['< <] ['<= <=]
-            ['and (lambda (x y) (and x y))]
-            ['or  (lambda (x y) (or  x y))]
-            ['not not] ['car car] ['cdr cdr]
-            [_ false])) ; <--------------------------------------- !!!
-
-(define (eval-env e env)
-  (match e
-    [(const n) n]
-    [(binop op l r) ((op->proc op) (eval-env l env)
-                                   (eval-env r env))]
-    [(unop op e) ((op->proc op) (eval-env e env))]
-    [(let-expr x e1 e2)
-     (eval-env e2 (env-add x (eval-env e1 env) env))]
-    [(var-expr x) (env-lookup x env)]
-    [(if-expr eb et ef) (if (eval-env eb env)
-                            (eval-env et env)
-                            (eval-env ef env))]
-    [(cons-expr e1 e2) (cons (eval-env e1 env)
-                             (eval-env e2 env))]
-    [(null-expr) null]
-    [(null?-expr e) (null? (eval-env e env))]
-    [(lam x e) (clo x e env)] ; <--------------------------------- !!!
-    [(app f e) ; <------------------------------------------------ !!!
-     (let ([vf (eval-env f env)]
-           [ve (eval-env e env)])
-       (match vf [(clo x body fun-env)
-                  (eval-env body (env-add x ve fun-env))]))]))
-
-(define (eval e) (eval-env e env-empty))
-
-(define program
-  '(let [twice (lambda (f x) (f (f x)))]
-   (let [inc (lambda (x) (+ 1 x))]
-     (twice twice twice twice inc 1))))
-    
-
-(define (test-eval) (eval (parse program)))
\ No newline at end of file
diff --git a/Semestr 2/racket/lista6/lista8/zad6.rkt b/Semestr 2/racket/lista6/lista8/zad6.rkt
deleted file mode 100644
index c7ea9f0..0000000
--- a/Semestr 2/racket/lista6/lista8/zad6.rkt
+++ /dev/null
@@ -1,171 +0,0 @@
-#lang racket
-
-; Do list.rkt dodajemy procedury
-;
-; Miejsca, ktore sie zmienily oznaczone sa przez !!!
-
-; --------- ;
-; Wyrazenia ;
-; --------- ;
-
-(struct const      (val)      #:transparent)
-(struct binop      (op l r)   #:transparent)
-(struct unop       (op e)     #:transparent)
-(struct var-expr   (id)       #:transparent)
-(struct let-expr   (id e1 e2) #:transparent)
-(struct if-expr    (eb et ef) #:transparent)
-(struct cons-expr  (e1 e2)    #:transparent)
-(struct null-expr  ()         #:transparent)
-(struct null?-expr (e)        #:transparent)
-(struct app        (f e)      #:transparent) ; <------------------ !!!
-(struct lam        (id e)     #:transparent) ; <------------------ !!!
-
-(define (expr? e)
-  (match e
-    [(const n) (or (number? n) (boolean? n))]
-    [(unop op e) (and (symbol? op) (expr? e))]
-    [(binop op l r) (and (symbol? op) (expr? l) (expr? r))]
-    [(var-expr x) (symbol? x)]
-    [(let-expr x e1 e2)
-     (and (symbol? x) (expr? e1) (expr? e2))]
-    [(if-expr eb et ef)
-     (and (expr? eb) (expr? et) (expr? ef))]
-    [(cons-expr e1 e2) (and (expr? e1) (expr? e2))]
-    [(null-expr) true]
-    [(null?-expr e) (expr? e)]
-    [(app f e) (and (expr? f) (expr? e))] ; <--------------------- !!!
-    [(lam id e) (and (symbol? id) (expr? e))] ; <----------------- !!!
-    [_ false]))
-
-(define (cedar? f)
-  (let ((letters (string->list (symbol->string f))))
-    (and (> (length letters) 2)
-         (eq? (first letters) #\c)
-         (eq? (first (reverse letters)) #\r)
-         (andmap (lambda (x) (or (eq? x #\a) (eq? x #\d)))
-                 (cdr letters)))))
-
-(define (get-cedar letters xs)
-  (cond [(eq? (car letters) #\r) xs]
-        [(eq? (car letters) #\a) (unop 'car (get-cedar (cdr letters) xs))]
-        [(eq? (car letters) #\d) (unop 'cdr (get-cedar (cdr letters) xs))]))
-
-(define (cedar f xs)
-  (let ((letters (string->list (symbol->string f))))
-    (get-cedar (cdr (reverse letters)) xs)))
-
-(define (parse q)
-  (cond
-    [(number? q) (const q)]
-    [(eq? q 'true)  (const true)]
-    [(eq? q 'false) (const false)]
-    [(eq? q 'null)  (null-expr)]
-    [(symbol? q) (var-expr q)]
-    [(and (list? q) (eq? (length q) 2) (eq? (first q) 'null?))
-     (null?-expr (parse (second q)))]
-    [(and (list? q) (eq? (length q) 3) (eq? (first q) 'cons))
-     (cons-expr (parse (second q))
-                (parse (third q)))]
-    [(and (list? q) (eq? (length q) 3) (eq? (first q) 'let))
-     (let-expr (first (second q))
-               (parse (second (second q)))
-               (parse (third q)))]
-    [(and (list? q) (eq? (length q) 4) (eq? (first q) 'if))
-     (if-expr (parse (second q))
-              (parse (third q))
-              (parse (fourth q)))]
-    [(and (list? q) (eq? (length q) 3) (eq? (first q) 'lambda)) ; <!!!
-     (parse-lam (second q) (third q))]
-    [(and (list? q) (eq? (length q) 2) (symbol? (first q))
-          (cedar? (first q)))
-     (cedar (first q) (parse (second q)))]
-    [(and (list? q) (pair? q) (not (op->proc (car q)))) ; <------- !!!
-     (parse-app q)]
-    [(and (list? q) (eq? (length q) 3) (symbol? (first q)))
-     (binop (first q)
-            (parse (second q))
-            (parse (third q)))]
-    [(and (list? q) (eq? (length q) 2) (symbol? (first q)))
-     (unop (first q) (parse (second q)))]))
-
-(define (parse-app q) ; <----------------------------------------- !!!
-  (define (parse-app-accum q acc)
-    (cond [(= 1 (length q)) (app acc (parse (car q)))]
-          [else (parse-app-accum (cdr q) (app acc (parse (car q))))]))
-  (parse-app-accum (cdr q) (parse (car q))))
-
-(define (parse-lam pat e) ; <------------------------------------- !!!
-  (cond [(= 1 (length pat))
-         (lam (car pat) (parse e))]
-        [else
-         (lam (car pat) (parse-lam (cdr pat) e))]))
-
-; ---------- ;
-; Srodowiska ;
-; ---------- ;
-
-(struct environ (xs) #:transparent)
-
-(define env-empty (environ null))
-(define (env-add x v env)
-  (environ (cons (cons x v) (environ-xs env))))
-(define (env-lookup x env)
-  (define (assoc-lookup xs)
-    (cond [(null? xs) (error "Unknown identifier" x)]
-          [(eq? x (car (car xs))) (cdr (car xs))]
-          [else (assoc-lookup (cdr xs))]))
-  (assoc-lookup (environ-xs env)))
-
-; --------- ;
-; Ewaluacja ;
-; --------- ;
-
-(struct clo (id e env) #:transparent) ; <------------------------- !!!
-
-(define (value? v)
-  (or (number? v)
-      (boolean? v)
-      (and (pair? v) (value? (car v)) (value? (cdr v)))
-      (null? v)
-      (clo? v))) ; <---------------------------------------------- !!!
-
-(define (op->proc op)
-  (match op ['+ +] ['- -] ['* *] ['/ /] ['% modulo]
-            ['= =] ['> >] ['>= >=] ['< <] ['<= <=]
-            ['and (lambda (x y) (and x y))]
-            ['or  (lambda (x y) (or  x y))]
-            ['not not] ['car car] ['cdr cdr]
-            [_ false])) ; <--------------------------------------- !!!
-
-(define (eval-env e env)
-  (match e
-    [(const n) n]
-    [(binop op l r) ((op->proc op) (eval-env l env)
-                                   (eval-env r env))]
-    [(unop op e) ((op->proc op) (eval-env e env))]
-    [(let-expr x e1 e2)
-     (eval-env e2 (env-add x (eval-env e1 env) env))]
-    [(var-expr x) (env-lookup x env)]
-    [(if-expr eb et ef) (if (eval-env eb env)
-                            (eval-env et env)
-                            (eval-env ef env))]
-    [(cons-expr e1 e2) (cons (eval-env e1 env)
-                             (eval-env e2 env))]
-    [(null-expr) null]
-    [(null?-expr e) (null? (eval-env e env))]
-    [(lam x e) (clo x e env)] ; <--------------------------------- !!!
-    [(app f e) ; <------------------------------------------------ !!!
-     (let ([vf (eval-env f env)]
-           [ve (eval-env e env)])
-       (match vf [(clo x body fun-env)
-                  (eval-env body (env-add x ve fun-env))]))]))
-
-(define (eval e) (eval-env e env-empty))
-
-(define program
-  '(let [twice (lambda (f x) (f (f x)))]
-   (let [inc (lambda (x) (+ 1 x))]
-     (twice twice twice twice inc 1))))
-    
-
-(define (test-eval) (eval (parse program)))
\ No newline at end of file
diff --git a/Semestr 2/racket/lista6/lista8/zadanie.rkt b/Semestr 2/racket/lista6/lista8/zadanie.rkt
deleted file mode 100644
index 0960f21..0000000
--- a/Semestr 2/racket/lista6/lista8/zadanie.rkt
+++ /dev/null
@@ -1,98 +0,0 @@
-#lang racket
-
-; Do let-env.rkt dodajemy wartosci boolowskie
-;
-; Miejsca, ktore sie zmienily oznaczone sa przez !!!
-
-; --------- ;
-; Wyrazenia ;
-; --------- ;
-
-(struct const    (val)      #:transparent)
-(struct binop    (op l r)   #:transparent)
-(struct var-expr (id)       #:transparent)
-(struct let-expr (id e1 e2) #:transparent)
-(struct if-expr  (eb et ef) #:transparent)
-
-(define (expr? e)
-  (match e
-    [(const n) (or (number? n) (boolean? n))] ; <----------------- !!!
-    [(binop op l r) (and (symbol? op) (expr? l) (expr? r))]
-    [(var-expr x) (symbol? x)]
-    [(let-expr x e1 e2)
-     (and (symbol? x) (expr? e1) (expr? e2))]
-    [(if-expr eb et ef) ; <--------------------------------------- !!!
-     (and (expr? eb) (expr? et) (expr? ef))]
-    [_ false]))
-
-(define (parse q)
-  (cond
-    [(number? q) (const q)]
-    [(eq? q 'true)  (const true)]  ; <---------------------------- !!!
-    [(eq? q 'false) (const false)] ; <---------------------------- !!!
-    [(symbol? q) (var-expr q)]
-    [(and (list? q) (eq? (length q) 3) (eq? (first q) 'let))
-     (let-expr (first (second q))
-               (parse (second (second q)))
-               (parse (third q)))]
-    [(and (list? q) (eq? (length q) 4) (eq? (first q) 'if)) ; <--- !!!
-     (if-expr (parse (second q))
-              (parse (third q))
-              (parse (fourth q)))]
-    [(and (list? q) (eq? (length q) 3) (symbol? (first q)))
-     (binop (first q)
-            (parse (second q))
-            (parse (third q)))]))
-
-(define (test-parse) (parse '(let [x (+ 2 2)] (+ x 1))))
-
-; ---------- ;
-; Srodowiska ;
-; ---------- ;
-
-(struct environ (xs))
-
-(define env-empty (environ null))
-(define (env-add x v env)
-  (environ (cons (cons x v) (environ-xs env))))
-(define (env-lookup x env)
-  (define (assoc-lookup xs)
-    (cond [(null? xs) (error "Unknown identifier" x)]
-          [(eq? x (car (car xs))) (cdr (car xs))]
-          [else (assoc-lookup (cdr xs))]))
-  (assoc-lookup (environ-xs env)))
-
-; --------- ;
-; Ewaluacja ;
-; --------- ;
-
-(define (value? v)
-  (or (number? v) (boolean? v)))
-
-(define (op->proc op)
-  (match op ['+ +] ['- -] ['* *] ['/ /] ['% modulo] ; <----------- !!!
-            ['= =] ['> >] ['>= >=] ['< <] ['<= <=]
-            ['and (lambda (x y) (and x y))]
-            ['or  (lambda (x y) (or  x y))]))
-
-(define (eval-env e env)
-  (match e
-    [(const n) n]
-    [(binop op l r) ((op->proc op) (eval-env l env)
-                                   (eval-env r env))]
-    [(let-expr x e1 e2)
-     (eval-env e2 (env-add x (eval-env e1 env) env))]
-    [(var-expr x) (env-lookup x env)]
-    [(if-expr eb et ef) (if (eval-env eb env) ; <----------------- !!!
-                            (eval-env et env)
-                            (eval-env ef env))]))
-
-(define (eval e) (eval-env e env-empty))
-
-(define program
-  '(if (or (< (% 123 10) 5)
-           true)
-       (+ 2 3)
-       (/ 2 0)))
-
-(define (test-eval) (eval (parse program)))
\ No newline at end of file
diff --git a/Semestr 2/racket/lista6/solution.bak b/Semestr 2/racket/lista6/solution.bak
deleted file mode 100644
index 0805991..0000000
--- a/Semestr 2/racket/lista6/solution.bak
+++ /dev/null
@@ -1,27 +0,0 @@
-#lang racket
-
-(provide (struct-out complex) parse eval)
-
-(struct complex (re im) #:transparent)
-
-(define value?
-  complex?)
-
-;; Ponizej znajduje sie interpreter zwyklych wyrazen arytmetycznych.
-;; Zadanie to zmodyfikowac go tak, by dzialal z liczbami zespolonymi.
-
-(struct const (val)    #:transparent)
-(struct binop (op l r) #:transparent)
-
-(define (op->proc op)
-  (match op ['+ +] ['- -] ['* *] ['/ /]))
-
-(define (eval e)
-  (match e
-    [(const n) n]
-    [(binop op l r) ((op->proc op) (eval l) (eval r))]))
-
-(define (parse q)
-  (cond [(number? q) (const q)]
-        [(and (list? q) (eq? (length q) 3) (symbol? (first q)))
-         (binop (first q) (parse (second q)) (parse (third q)))]))
\ No newline at end of file
diff --git a/Semestr 2/racket/lista6/solution.rkt b/Semestr 2/racket/lista6/solution.rkt
deleted file mode 100644
index 59bdecd..0000000
--- a/Semestr 2/racket/lista6/solution.rkt
+++ /dev/null
@@ -1,73 +0,0 @@
-#lang racket
-
-(provide (struct-out complex) parse eval)
-
-(struct complex (re im) #:transparent)
-
-(define value?
-  complex?)
-
-(define (comp-plus x y)
-  (let ((x-re (complex-re x))
-        (x-im (complex-im x))
-        (y-re (complex-re y))
-        (y-im (complex-im y)))
-    (complex (+ x-re y-re) (+ x-im y-im))))
-
-(define (comp-minus x y)
-  (let ((x-re (complex-re x))
-        (x-im (complex-im x))
-        (y-re (complex-re y))
-        (y-im (complex-im y)))
-    (complex (- x-re y-re) (- x-im y-im))))
-
-(define (comp-mult x y)
-  (let ((x-re (complex-re x))
-        (x-im (complex-im x))
-        (y-re (complex-re y))
-        (y-im (complex-im y)))
-    (complex (- (* x-re y-re) (* x-im y-im)) (+ (* x-re y-im) (* x-im y-re)))))
-
-(define (comp-mod2 x)
-  (let ((x-re (complex-re x))
-        (x-im (complex-im x)))
-    (complex (+ (* x-re x-re) (* x-im x-im)) 0)))
-
-(define (comp-mod x)
-  (let ((mod2 (comp-mod2 x))
-        (x-re (complex-re x)))
-    (complex (sqrt x-re) 0)))
-
-(define (comp-div x y)
-  (let* ((mod2 (complex-re (comp-mod2 y)))
-        (x-re (complex-re x))
-        (x-im (complex-im x))
-        (y-re (complex-re y))
-        (y-im (complex-im y))
-        (real (+ (* x-re y-re) (* x-im y-im)))
-        (imag (- (* x-im y-re) (* x-re y-im))))
-    (complex (/ real mod2) (/ imag mod2))))
-  
-
-;; Ponizej znajduje sie interpreter zwyklych wyrazen arytmetycznych.
-;; Zadanie to zmodyfikowac go tak, by dzialal z liczbami zespolonymi.
-
-(struct const (val)    #:transparent)
-(struct binop (op l r) #:transparent)
-
-(define (imaginary-unit? c)
-  (eq? c 'i))
-
-(define (op->proc op)
-  (match op ['+ comp-plus] ['- comp-minus] ['* comp-mult] ['/ comp-div]))
-
-(define (eval e)
-  (match e
-    [(const n) n]
-    [(binop op l r) ((op->proc op) (eval l) (eval r))]))
-
-(define (parse q)
-  (cond [(number? q) (const (complex q 0))]
-        [(imaginary-unit? q) (const (complex 0 1))]
-        [(and (list? q) (eq? (length q) 3) (symbol? (first q)))
-         (binop (first q) (parse (second q)) (parse (third q)))]))
\ No newline at end of file
diff --git a/Semestr 2/racket/lista6/zad11/solution.bak b/Semestr 2/racket/lista6/zad11/solution.bak
deleted file mode 100644
index f449481..0000000
--- a/Semestr 2/racket/lista6/zad11/solution.bak
+++ /dev/null
@@ -1,36 +0,0 @@
-#lang racket
-
-(provide (struct-out const) (struct-out binop) rpn->arith)
-
-;; -------------------------------
-;; Wyrazenia w odwr. not. polskiej
-;; -------------------------------
-
-(define (rpn-expr? e)
-  (and (list? e)
-       (pair? e)
-       (andmap (lambda (x) (or (number? x) (member x '(+ - * /))))
-               e)))
-
-;; ----------------------
-;; Wyrazenia arytmetyczne
-;; ----------------------
-
-(struct const (val)    #:transparent)
-(struct binop (op l r) #:transparent)
-
-(define (arith-expr? e)
-  (match e
-    [(const n) (number? n)]
-    [(binop op l r)
-     (and (symbol? op) (arith-expr? l) (arith-expr? r))]
-    [_ false]))
-
-;; ----------
-;; Kompilacja
-;; ----------
-
-(define (rpn->arith e)
-  (error "TODO: Uzupelnij tutaj"))
-
-; Mozesz tez dodac jakies procedury pomocnicze i testy
\ No newline at end of file
diff --git a/Semestr 2/racket/lista6/zad11/solution.rkt b/Semestr 2/racket/lista6/zad11/solution.rkt
deleted file mode 100644
index a44afe4..0000000
--- a/Semestr 2/racket/lista6/zad11/solution.rkt
+++ /dev/null
@@ -1,58 +0,0 @@
-#lang racket
-
-(provide (struct-out const) (struct-out binop) rpn->arith)
-
-;; -------------------------------
-;; Wyrazenia w odwr. not. polskiej
-;; -------------------------------
-
-(define (rpn-expr? e)
-  (and (list? e)
-       (pair? e)
-       (andmap (lambda (x) (or (number? x) (member x '(+ - * /))))
-               e)))
-
-;; ----------------------
-;; Wyrazenia arytmetyczne
-;; ----------------------
-
-(struct const (val)    #:transparent)
-(struct binop (op l r) #:transparent)
-
-(define (arith-expr? e)
-  (match e
-    [(const n) (number? n)]
-    [(binop op l r)
-     (and (symbol? op) (arith-expr? l) (arith-expr? r))]
-    [_ false]))
-
-;; ----------
-;; Kompilacja
-;; ----------
-
-(struct stack (xs))
-
-(define empty-stack (stack null))
-(define (empty-stack? s) (null? (stack-xs s)))
-(define (top s) (car (stack-xs s)))
-(define (push a s) (stack (cons a (stack-xs s))))
-(define (pop s) (stack (cdr (stack-xs s))))
-
-(define (op->proc op)
-  (match op ['+ +] ['- -] ['* *] ['/ /]))
-
-(define (eval-am e s)
-  (cond [(null? e)
-         (top s)]
-        [(number? (car e))
-         (eval-am (cdr e) (push (const (car e)) s))]
-        [(symbol? (car e))
-         (eval-am (cdr e)
-                  (push (binop (car e) (top (pop s)) (top s))
-                        (pop (pop s))))]))
-
-(define (rpn->arith e)
-  (eval-am e empty-stack))
-  
-
-; Mozesz tez dodac jakies procedury pomocnicze i testy
\ No newline at end of file