1 files changed, 40 insertions, 40 deletions

diff --git a/10/2.rkt b/10/2.rkt
index 0d9c5a6..327fbf1 100644
--- a/10/2.rkt
+++ b/10/2.rkt
@@ -16,12 +16,12 @@
 (define (find-start)
   (let loop ((x 0) (y 0))
     (if (>= y height)
-      #f
-      (if (>= x width)
-        (loop 0 (+ y 1))
-        (if (char=? #\S (char-at x y))
-          (cons x y)
-          (loop (+ x 1) y))))))
+        #f
+        (if (>= x width)
+            (loop 0 (+ y 1))
+            (if (char=? #\S (char-at x y))
+                (cons x y)
+                (loop (+ x 1) y))))))
 
 (define start (find-start))
 
@@ -37,18 +37,18 @@
     (define down (cons (car start) (+ (cdr start) 1)))
     (define left (cons (- (car start) 1) (cdr start)))
     (define right (cons (+ (car start) 1) (cdr start)))
-      (cond ((and (valid-pos? up)
-                  (member (char-at (car up) (cdr up)) (list #\| #\F #\7)))
-            up)
-            ((and (valid-pos? down)
-                  (member (char-at (car down) (cdr down)) (list #\| #\L #\J )))
-            down)
-            ((and (valid-pos? left)
-                  (member (char-at (car left) (cdr left)) (list #\- #\F #\L )))
-            left)
-            ((and (valid-pos? right)
-                  (member (char-at (car right) (cdr right)) (list #\- #\7 #\J)))
-            right))))
+    (cond ((and (valid-pos? up)
+                (member (char-at (car up) (cdr up)) (list #\| #\F #\7)))
+           up)
+          ((and (valid-pos? down)
+                (member (char-at (car down) (cdr down)) (list #\| #\L #\J )))
+           down)
+          ((and (valid-pos? left)
+                (member (char-at (car left) (cdr left)) (list #\- #\F #\L )))
+           left)
+          ((and (valid-pos? right)
+                (member (char-at (car right) (cdr right)) (list #\- #\7 #\J)))
+           right))))
 
 (define (next cur recent)
   (define up (cons (car cur) (- (cdr cur) 1)))
@@ -65,8 +65,8 @@
           ((char=? c #\J) (list up left))))
   (let loop ((cur possible-pos))
     (if (not (equal? (car cur) recent))
-      (car cur)
-      (loop (cdr cur)))))
+        (car cur)
+        (loop (cdr cur)))))
 
 (define pipes (make-hash))
 
@@ -74,22 +74,22 @@
   (let loop ((i 0) (cur first-pos) (recent start))
     (hash-set! pipes cur '())
     (if (equal? cur start)
-      i
-      (let ()
-        (define next-loc (next cur recent))
-        (loop (+ i 1) next-loc cur)))))
+        i
+        (let ()
+          (define next-loc (next cur recent))
+          (loop (+ i 1) next-loc cur)))))
 
 (define (mark-junk)
   (let loop ((x 0) (y 0))
     (if (>= y height)
-      (void)
-      (if (>= x width)
-        (loop 0 (+ y 1))
-        (let ()
-          (when (and (not (hash-has-key? pipes (cons x y)))
-                     (not (char=? #\. (char-at x y))))
-            (string-set! (vector-ref diagram y) x #\.))
-          (loop (+ 1 x) y))))))
+        (void)
+        (if (>= x width)
+            (loop 0 (+ y 1))
+            (let ()
+              (when (and (not (hash-has-key? pipes (cons x y)))
+                         (not (char=? #\. (char-at x y))))
+                (string-set! (vector-ref diagram y) x #\.))
+              (loop (+ 1 x) y))))))
 
 (let ()
   (simulate)
@@ -99,14 +99,14 @@
 (define (ray-cast-find s)
   (let loop ((i 0) (flag #f) (ret 0))
     (if (>= i width)
-      ret
-      (let ()
-        (define char (string-ref s i))
-        (if (and flag (char=? char #\.))
-          (loop (+ 1 i) flag (+ 1 ret))
-          (if (member char (list #\| #\F #\7))
-            (loop (+ 1 i) (not flag) ret)
-            (loop (+ 1 i) flag ret)))))))
+        ret
+        (let ()
+          (define char (string-ref s i))
+          (if (and flag (char=? char #\.))
+              (loop (+ 1 i) flag (+ 1 ret))
+              (if (member char (list #\| #\F #\7))
+                  (loop (+ 1 i) (not flag) ret)
+                  (loop (+ 1 i) flag ret)))))))
 
 (apply + (map ray-cast-find (vector->list diagram)))