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authorJune McEnroe <june@causal.agency>2019-12-04 01:49:17 -0500
committerJune McEnroe <june@causal.agency>2020-11-22 00:14:26 -0500
commit612fb33a9b07f8588013c6114119060e8f6b8f54 (patch)
tree50eb3f6d71f9c4e762e6f949a855105ee71f250b
parentSolve day 4 part 1 (diff)
downloadaoc-612fb33a9b07f8588013c6114119060e8f6b8f54.tar.gz
aoc-612fb33a9b07f8588013c6114119060e8f6b8f54.zip
Solve day 4 part 2
-rw-r--r--2019/day04.c17
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);
 }