X-Git-Url: https://git.martlubbers.net/?a=blobdiff_plain;f=13b.c;h=dafd0ea07fcb50799474fa8093ef2da59391d182;hb=a622aa41088ddf29d38c50e2032ca84984b0e12b;hp=092cf7a68e4e06fe3bdf1a9d76558ac176e1743b;hpb=967152a3319e0207e16901ecc0344edaf8c8193e;p=advent21.git

diff --git a/13b.c b/13b.c
index 092cf7a..dafd0ea 100644
--- a/13b.c
+++ b/13b.c
@@ -1,5 +1,4 @@
 #include <stdio.h>
-#include <stdbool.h>
 
 #include <uthash.h>
 
@@ -49,15 +48,14 @@ int main()
 		*(to++)= '\0';
 		add_dot(&grid, pnt(atoi(buf), atoi(to)));
 	}
-	while (getline(&buf, &len, stdin) != -1) {
-		char *to = strchr(buf, '=');
-		fold (&grid, *(to-1), atoi(to+1));
-	}
 
 	int maxx = 0, maxy = 0;
-	for (struct dot *d = grid; d!=NULL; d = d->hh.next) {
-		maxx = maxx < d->p.x ? d->p.x : maxx;
-		maxy = maxy < d->p.y ? d->p.y : maxy;
+	while (getline(&buf, &len, stdin) != -1) {
+		char *to = strchr(buf, '=')-1;
+		int foldline = atoi(to+2);
+		fold (&grid, *to, foldline--);
+		if (*to == 'x') maxx = foldline;
+		else            maxy = foldline;
 	}
 
 	struct dot *d;