1 files changed, 17 insertions, 0 deletions
diff --git a/2019/day04.c b/2019/day04.c
index 3c31931..45158cd 100644
--- a/2019/day04.c
+++ b/2019/day04.c
@@ -15,4 +15,21 @@ int main(void) {
 		if (adj && !dec) count++;
 	}
 	printf("%d\n", count);
+
+	count = 0;
+	for (int n = min; n <= max; ++n) {
+		char str[7];
+		snprintf(str, sizeof(str), "%d", n);
+		int adj = 0, dec = 0;
+		for (int i = 1; i < 6; ++i) {
+			if (
+				str[i] == str[i - 1]
+				&& (i < 2 || str[i - 2] != str[i])
+				&& (i > 5 || str[i + 1] != str[i])
+			) adj = 1;
+			if (str[i] < str[i - 1]) dec = 1;
+		}
+		if (adj && !dec) count++;
+	}
+	printf("%d\n", count);
 }