Solve day 6 part 2

1 files changed, 15 insertions, 1 deletions

diff --git a/2022/day06.awk b/2022/day06.awk
index 176cd4f..b682780 100644
--- a/2022/day06.awk
+++ b/2022/day06.awk
@@ -1,5 +1,13 @@
+function repeats(s, i) {
+	for (i = 1; i <= length(s); i++) {
+		for (j = i+1; j <= length(s); j++) {
+			if (substr(s, i, 1) == substr(s, j, 1)) return 1;
+		}
+	}
+	return 0;
+}
 {
-	for (i = 1; i < length; i++) {
+	for (i = 1; i <= length; i++) {
 		c1 = c2;
 		c2 = c3;
 		c3 = c4;
@@ -11,4 +19,10 @@
 		print i;
 		break;
 	}
+	for (i = 1; i+14 <= length; i++) {
+		s = substr($1, i, 14);
+		if (repeats(s)) continue;
+		print 13+i;
+		break;
+	}
 }