Initial data commit

Task/Balanced-brackets/Factor/balanced-brackets-1.factor

@@ -0,0 +1,22 @@
+USING: io formatting locals kernel math sequences unicode.case ;
+IN: balanced-brackets
+
+:: balanced ( str -- )
+   0 :> counter!
+   1 :> ok!
+   str
+   [ dup length 0 > ]
+   [ 1 cut swap
+     "[" = [ counter 1 + counter! ] [ counter 1 - counter! ] if
+     counter 0 < [ 0 ok! ] when
+   ]
+   while
+   drop
+   ok 0 =
+   [ "NO" ]
+   [ counter 0 > [ "NO" ] [ "YES" ] if ]
+   if
+   print ;
+
+readln
+balanced

Task/Balanced-brackets/Factor/balanced-brackets-2.factor

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+USING: io formatting locals kernel math sequences unicode.case ;
+IN: balanced-brackets
+
+: map-braces ( -- qout )
+  [
+    {
+      { "[" [ drop  1 ] }
+      { "]" [ drop -1 ] }
+            [ drop  0 ]
+    } case
+  ]
+;
+
+: balanced? ( str -- ? )
+  map-braces map sum 0 =
+;
+
+"[1+2*[3+4*[5+6]-3]*4-[3*[3+3]]]" balanced?
+-- Data stack:
+t