4 files changed, 831 insertions, 0 deletions
diff --git a/Semestr 2/racket/l11/rozw.bak b/Semestr 2/racket/l11/rozw.bak
new file mode 100644
index 0000000..cda82ce
--- /dev/null
+++ b/Semestr 2/racket/l11/rozw.bak
@@ -0,0 +1,2 @@
+#lang racket
+
diff --git a/Semestr 2/racket/l11/rozw.rkt b/Semestr 2/racket/l11/rozw.rkt
new file mode 100644
index 0000000..e45e403
--- /dev/null
+++ b/Semestr 2/racket/l11/rozw.rkt
@@ -0,0 +1,776 @@
+#reader(lib"read.ss""wxme")WXME0109 ## 
+#|
+   This file uses the GRacket editor format.
+   Open this file in DrRacket version 7.6 or later to read it.
+
+   Most likely, it was created by saving a program in DrRacket,
+   and it probably contains a program with non-text elements
+   (such as images or comment boxes).
+
+            http://racket-lang.org/
+|#
+ 33 7 #"wxtext\0"
+3 1 6 #"wxtab\0"
+1 1 8 #"wximage\0"
+2 0 8 #"wxmedia\0"
+4 1 34 #"(lib \"syntax-browser.ss\" \"mrlib\")\0"
+1 0 36 #"(lib \"cache-image-snip.ss\" \"mrlib\")\0"
+1 0 68
+(0
+ #"((lib \"image-core.ss\" \"mrlib\") (lib \"image-core-wxme.rkt\" \"mr"
+ #"lib\"))\0"
+) 1 0 16 #"drscheme:number\0"
+3 0 44 #"(lib \"number-snip.ss\" \"drscheme\" \"private\")\0"
+1 0 36 #"(lib \"comment-snip.ss\" \"framework\")\0"
+1 0 93
+(1
+ #"((lib \"collapsed-snipclass.ss\" \"framework\") (lib \"collapsed-sni"
+ #"pclass-wxme.ss\" \"framework\"))\0"
+) 0 0 43 #"(lib \"collapsed-snipclass.ss\" \"framework\")\0"
+0 0 19 #"drscheme:sexp-snip\0"
+0 0 29 #"drscheme:bindings-snipclass%\0"
+1 0 101
+(2
+ #"((lib \"ellipsis-snip.rkt\" \"drracket\" \"private\") (lib \"ellipsi"
+ #"s-snip-wxme.rkt\" \"drracket\" \"private\"))\0"
+) 2 0 88
+(3
+ #"((lib \"pict-snip.rkt\" \"drracket\" \"private\") (lib \"pict-snip.r"
+ #"kt\" \"drracket\" \"private\"))\0"
+) 0 0 55
+#"((lib \"snip.rkt\" \"pict\") (lib \"snip-wxme.rkt\" \"pict\"))\0"
+1 0 34 #"(lib \"bullet-snip.rkt\" \"browser\")\0"
+0 0 25 #"(lib \"matrix.ss\" \"htdp\")\0"
+1 0 22 #"drscheme:lambda-snip%\0"
+1 0 29 #"drclickable-string-snipclass\0"
+0 0 26 #"drracket:spacer-snipclass\0"
+0 0 57
+#"(lib \"hrule-snip.rkt\" \"macro-debugger\" \"syntax-browser\")\0"
+1 0 26 #"drscheme:pict-value-snip%\0"
+0 0 45 #"(lib \"image-snipr.ss\" \"slideshow\" \"private\")\0"
+1 0 38 #"(lib \"pict-snipclass.ss\" \"slideshow\")\0"
+2 0 55 #"(lib \"vertical-separator-snip.ss\" \"stepper\" \"private\")\0"
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+1 0 21 #"drscheme:scheme-snip\0"
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+1 0 10 #"text-box%\0"
+1 0 32 #"(lib \"text-snipclass.ss\" \"xml\")\0"
+1 0 1 6 #"wxloc\0"
+          0 0 81 0 1 #"\0"
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+#"Standard\0"
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+0 0 24 3 1 #")"
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+0 0 24 3 2 #") "
+0 0 14 3 3 #"beg"
+0 0 24 3 3 #")))"
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+0 0 24 29 1 #"\n"
+0 0 24 3 1 #"("
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+0 0 24 3 2 #" ("
+0 0 14 3 7 #"compose"
+0 0 24 3 1 #" "
+0 0 14 3 2 #"bc"
+0 0 24 3 1 #" "
+0 0 14 3 2 #"ab"
+0 0 24 3 1 #")"
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+0 0 24 3 1 #" "
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+0 0 14 3 1 #"c"
+0 0 24 3 3 #") ("
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+0 0 24 3 1 #" "
+0 0 14 3 1 #"b"
+0 0 24 3 3 #") ("
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+0 0 14 3 1 #"a"
+0 0 24 3 1 #" "
+0 0 14 3 1 #"c"
+0 0 24 3 3 #")))"
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+0 0 15 3 6 #"lambda"
+0 0 24 3 2 #" ("
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+0 0 24 3 3 #") ("
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+0 0 24 3 2 #" ("
+0 0 14 3 2 #"ab"
+0 0 24 3 1 #" "
+0 0 14 3 1 #"x"
+0 0 24 3 4 #"))))"
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+0 0 24 29 1 #"\n"
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+0 0 24 3 1 #" "
+0 0 14 3 1 #"f"
+0 0 24 3 1 #")"
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+0 0 24 3 2 #" ["
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+0 0 24 3 3 #"] ("
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+0 0 24 3 2 #" ("
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+0 0 24 3 2 #" ("
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+0 0 14 3 1 #"a"
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+0 0 14 3 8 #"identity"
+0 0 24 3 2 #"))"
+0 0 24 29 1 #"\n"
+0 0 24 29 1 #"\n"
+0 0 17 3 13 #";;; Zadanie 4"
+0 0 24 29 1 #"\n"
+0 0 24 29 1 #"\n"
+0 0 24 3 1 #"("
+0 0 15 3 15 #"define/contract"
+0 0 24 3 2 #" ("
+0 0 14 3 12 #"broken-contr"
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+0 0 14 3 1 #"x"
+0 0 24 3 1 #")"
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+0 0 14 3 1 #"b"
+0 0 24 3 3 #"] ("
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+0 0 24 3 2 #"))"
+0 0 24 29 1 #"\n"
+0 0 24 29 1 #"\n"
+0 0 24 29 1 #"\n"
+0 0 17 3 13 #";;; Zadanie 5"
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+0 0 15 3 15 #"define/contract"
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+0 0 14 3 9 #"foldl-map"
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+0 0 14 3 2 #"ys"
+0 0 24 3 5 #")))))"
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+0 0 24 3 2 #"))"
+0           0
diff --git a/Semestr 2/racket/l11/solution.bak b/Semestr 2/racket/l11/solution.bak
new file mode 100644
index 0000000..3ae167a
--- /dev/null
+++ b/Semestr 2/racket/l11/solution.bak
@@ -0,0 +1,18 @@
+#lang racket
+
+(require racket/contract)
+
+(provide (contract-out [square square/c]))
+(provide square/c)
+
+(define square/c (-> number? (not/c negative?)))
+
+(define (square x) (* x x))
+
+
+(define with-labels/c (parametric->/c [a b] (-> (-> a b))
+
+(define (with-labels f xs)
+  (if (null? xs)
+      null
+      (cons (list (f (car xs)) (car xs)) (with-labels f (cdr xs)))))
+\ No newline at end of file
diff --git a/Semestr 2/racket/l11/solution.rkt b/Semestr 2/racket/l11/solution.rkt
new file mode 100644
index 0000000..55e4ba6
--- /dev/null
+++ b/Semestr 2/racket/l11/solution.rkt
@@ -0,0 +1,35 @@
+#lang racket
+
+(provide (contract-out
+           [with-labels with-labels/c]
+           [foldr-map foldr-map/c]
+           [pair-from pair-from/c]))
+(provide with-labels/c foldr-map/c pair-from/c)
+
+
+(define with-labels/c (parametric->/c [a b] (-> (-> a b) (listof a) (listof (cons/c b (cons/c a null?))))))
+
+(define (with-labels f xs)
+  (if (null? xs)
+      null
+      (cons (list (f (car xs)) (car xs)) (with-labels f (cdr xs)))))
+
+
+
+(define foldr-map/c (parametric->/c [x a f] (-> (-> x a (cons/c f a)) a (listof x) (cons/c (listof f) a))))
+
+(define (foldr-map f a xs)
+  (define (it a xs ys)
+    (if (null? xs)
+        (cons ys a)
+        (let [(p (f (car xs) a))]
+          (it (cdr p)
+              (cdr xs)
+              (cons (car p) ys)))))
+  (it a (reverse xs) null))
+
+
+(define pair-from/c (parametric->/c [x fx gx] (-> (-> x fx) (-> x gx) (-> x (cons/c fx gx)))))
+
+(define (pair-from f g)
+  (lambda (x) (cons (f x) (g x))))
+\ No newline at end of file