From 554ad47f09974f0131df285fda8ea50a1fdad8f5 Mon Sep 17 00:00:00 2001
From: Sebastiano Tronto <sebastiano@tronto.net>
Date: Mon, 11 Dec 2023 15:14:47 +0100
Subject: Initial commit, some solutions

---
 2023/08/8a.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 2023/08/8a.c

(limited to '2023/08/8a.c')

diff --git a/2023/08/8a.c b/2023/08/8a.c
new file mode 100644
index 0000000..62f6fcd
--- /dev/null
+++ b/2023/08/8a.c
@@ -0,0 +1,35 @@
+#include <inttypes.h>
+#include <math.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define N 30000
+
+bool isnum(char c) { return c >= '0' && c <= '9'; }
+int index(char *c) { return c[0]-'A' + (c[1]-'A' + (c[2]-'A')*26)*26; }
+
+int map[N][2];
+
+int main() {
+	char *buf, dir[N], line[N];
+	int n, i, s;
+
+	n = strlen(fgets(dir, N, stdin)) - 1;
+
+	fgets(line, N, stdin);
+	while ((buf = fgets(line, N, stdin)) != NULL) {
+		i = index(buf);
+		while (*buf != '(') buf++;
+		map[i][0] = index(buf+1);
+		while (*buf != ' ') buf++;
+		map[i][1] = index(buf+1);
+	}
+
+	for (i = index("AAA"), s = 0; i != index("ZZZ"); s++)
+		i = map[i][dir[s % n] == 'R'];
+
+	printf("%d\n", s);
+	return 0;
+}
-- 
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