From eb2fee53e6de6873266944a4c47d748bc818ac69 Mon Sep 17 00:00:00 2001
From: June McEnroe <june@causal.agency>
Date: Wed, 5 Dec 2018 01:51:11 -0500
Subject: Solve day 5 part 1

---
 2018/day05.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 2018/day05.c

diff --git a/2018/day05.c b/2018/day05.c
new file mode 100644
index 0000000..5cb9366
--- /dev/null
+++ b/2018/day05.c
@@ -0,0 +1,17 @@
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int main() {
+	char buf[50000];
+	size_t len = fread(buf, 1, sizeof(buf), stdin);
+	for (size_t i = 0; i < len - 1; ++i) {
+		if (tolower(buf[i]) != tolower(buf[i + 1])) continue;
+		if (islower(buf[i]) == islower(buf[i + 1])) continue;
+		len -= 2;
+		memmove(&buf[i], &buf[i + 2], len - i);
+		i = (size_t)-1;
+	}
+	printf("%zu\n", len);
+}
-- 
cgit 1.4.1