Added first solution of day 11

3 files changed, 201 insertions, 0 deletions

diff --git a/2020/11/Makefile b/2020/11/Makefile
new file mode 100644
index 0000000..7f68e56
--- /dev/null
+++ b/2020/11/Makefile
@@ -0,0 +1,10 @@
+.PHONY: solve.c
+
+solve.o: solve.c
+	@gcc $+ -o $@ -lm
+
+clean:
+	@rm -f *.o
+
+run: solve.o
+	@./solve.o
diff --git a/2020/11/input b/2020/11/input
new file mode 100644
index 0000000..bbaf4ea
--- /dev/null
+++ b/2020/11/input
@@ -0,0 +1,97 @@
+LLLLLLLLL.L.LLL.L.LLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLL.LLLLL.LLLLLLLLLLLLLLLL
+LLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLLLLL
+LLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLL.LLLLLLL.LLLL.LLLLLL.LLLLL.LLLLLLLLLLLLLLLL
+LLLLLLLLLLLLL.LLLLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLL.LLLLLL.LLLLLLLLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLLLLL
+LLLLLLLLLLLLLLL.LLLLLLL.LLL.LLLLLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLL
+L..LL.L.L....L..L.L....L.....L.L.L......L..L..L....L.LL.......L.....L....L..L................L....
+LLLLLLLLLLLLLLL.LLL.LLL.LLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLL.LLLLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLL
+LLLLLLLLLLLLLLL.LLLLLLLLLLLLLLL..LLLLLLLL.LLLLLLL.LLLLL.LLLLLLL.LLLL.LLLLLL.LLLLLLLLL.LLL.LLLLLLLL
+LLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLL.LLLLLLLLLLLLL.LLLLLLLL
+LLLLLLLLL.LLLLL.LLL.LLL.LLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLL.LLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLL
+LL.LLLLLLLLLLLL.LLL.LLL.LLLLLLLL.LLLLLLLL.LLLLLLL..LLLL.LLLLLLL.LLLL.LLLLLL.LLLLL.LLLL.LL.LLLLLLLL
+LLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLLLL.L.LLLLLLL.LLLL.LLLLLL.LLLLLLLLLLLLLLLLLLLLLL
+LLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLLLLL
+LLLLLLLLL.LLLLLLLLLLLLL.LLLL.LLL.LLLLLLLL.LLLLLLLLL.LLLLLLLLLLL.LLLL.LLLLLLLLLLLLLLLLLLLL.LLLLLLLL
+LLLLLLLLLL.LLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLL.LLLLLLLLLLLLL.LLLL.LLLLLLLLL.LL.LLLLLLLLLLLLLLLL
+.LLLL..L.L..L....L.LLL...LLL..L.L....L.L.L...L.....L...L.....L...L..L...LL...L..LLL..L...L....L..L
+LLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLL.LLLL.LLLLLLLLLLLLLLL.LLLLLLLLLLLLL
+LLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLL.LLLLLLLLLLLL.LLLLLLL.LLLLLLLL
+LLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLL.LLLLL.LLLLLLL.LLLL.LLLLLL.LLLL..LLLLLLL.LLLLLLLL
+LLLLLLLLL.LLLLL..LLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLL.LLLLL.LLLLLLL.LLLL.LLLLLL.LLLLLLLLLLLLL.LLLLLLLL
+.....LL...LL..L...L..L..LL.L..LLL...L..L.LLL...LLL..L.....L...L.....L........LLLL..LLL.....L....L.
+LLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLL.LLLLLL.LLLLL.LLLLLLLLLLLLLLLL
+LLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLLLLL
+LLLLLLLLL.LLLLLLLLLLLLLLL.LLLLLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLL.LLLLLL.LLLLLLLLLLLLLLLLLLLLLL
+LLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLL.LLLLLLL.LLLL.LLLLLL.LLLLLLLLLLLLLLLLLLLLLL
+LLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLLL.LLLL.LLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLL
+LLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLL.LLLLL.LLLLLLLLLLLLL.LL
+LLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLL.LLLL.LL.LLLLLLLLLLLLL.LLLLLLLLLLL.LLLLL.LLLLLLL.LLLLLL.L
+LLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLL.LLLLLLLLL.LLLLLLL.LLLL.LLL.LL.LLLLL.LLLLLLLLLLLLLLLL
+LLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.L.LLLLL.LLLLLLLL
+....L..LL.L.L......L..LL.......LL......L..L...L..L.........LL....LL.LLL..LLLL..L..L.......L....L..
+LLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLL.LLLL.LLLLLL.LLLLL.LLLLLLL.LLLLLLLL
+LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLL.LLLLLL.LLLLL.LLLLLLLLLLLLLLLL
+LLLLLLLLL.LLL.L.LLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLLLL.LLL.LLLLLLLLLLLL
+LLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLLLLLL.LLLLLLL.LLLL.LLLLLLLLLLLLLLLLLLLL.LLLLLLLL
+LLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLL
+.LL..LLLLL.LL.L...L...L...L....LLLL...LLLL.LL...LL...L.LL...LL..LL.L..L......L....L.L.L.L...LL...L
+LLLLLLLLL.LLLLLLLLLLLLL..LLLLLLL.LLLLLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLL.LLLLLL.LLLLLLLLLLLLL.LLLLLLLL
+LLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLL.LLLLL.LLLLLLL.LLLL.LLLLLLLLL.LL.LLLLLLLLLLLLLLLL
+LLLLLLLLL.LLLLL.L.LLLLL.LLLLLLLL.LLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLLLLL
+LLLLLLLLL.LLLL..LLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLL.LLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLL.LLLLLLLL
+LLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLL.LLLLL.LLLLLLL.LLLL.LLLLLL.LLLLL.LLLLLLL.LLLLLLLL
+LLLLLLLLL.LL.LL.LLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLL.LLLL.LLLLLL.LLLLLLLLLLLLL.LLLLLLLL
+LLLLLLLLLLLL.LLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLL.LLLLLLLLLL.LLLLLLL.LLLLLL.LLLLLLLLLLLLL.LLLLLLLL
+LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLL.LLLLLLL.LLLL.LLLLLLLLLLLL.LLLLL.L.LLLLLLLL
+....L.........LL...L.L..LL.L.L..L......L.L.L...L....L.......LL.LL....L.L...L....L...L....L...L....
+L.LLLLLLL.LLLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLLLLLL.LLLLLLLLLLLL.LLLLLL.LLLLL.LLLLLLL.LL..LLLL
+LLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLL.LLLLLLL..LLLLLLL.LLLLLLLLLLLLL.LLLL.LLLLLL.LLLLL.LLLLLLL.LLLLLLLL
+LLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLL.L.LLLLLLL.LLLLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLL
+LLLLLL.LL.LLLLLLLLLLLLL.LLLL.LLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLL
+LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLL
+LLL..L.L........L...L..L.LLLLLLL..LLLL..L...L..L.L..LLL....L..L.LLL..L...L..L.......L.LLLLLL.LL.L.
+LLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLL.LLLLL.LL.LLLL.LLLL.LLLLLL.LLLLL.LLLLLLLLLLLLLLLL
+LLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLL.LLLL.LLLLLLLLLLLL.LLLLLLL.LLLLLLLL
+LLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLL.LL.LL.LLLLLLL.LLLL.LLLLLL.LLLLLLLLLLLLL.LLLLLLLL
+LLLLLLLLL.LLLLL.LLLLLLL.LLL.LLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLL.LLLLLLLL
+L...L.....LL....L.L.LLLLL.....L....LL..L.....L...L.L.LL.......LL...LL............L.L..L..LLL..LL..
+LLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLLLL.LLLL.LLLLLLLLLLLL.LLLLLLL.LLLLLLLL
+LLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLL.LLLLL.LLLLLLL.LLLL.LLLLLL.LLLLL.LLLLLLL.LLLLL.LL
+LL.LLLLLLLLLLLL.L.LLL.LLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLL.LL.LLLL.LLLLLL.LLLLL.LLLLLLL.L.LLLLLL
+LLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLL.LLL.LLLL
+LLLLLLLLL.LLLLL.L.LLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLL.LLLLLLL.LLLLLLLL
+LLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLL.LLLLLLL.LLLL.LLLLLLLLLLLLLL.LLLLLLLLLLLLLL
+LLLL.LLLL.LLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLL.LLLLL.LLLLLL..LLLL.LLLLLL.LLLLL.LLLLLLL.LLLLLLLL
+LL...L.........L..LLL........L.L..L....L.L.L....LLLL.LL.L....LL....L.LL.LLL..L..L....LL.L......LLL
+LLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLL.LLLLLL.L.LLLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL
+LLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL
+LLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLL.LLLLLLLLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLL
+LLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLL.LLLLLLL.LLLL.LLLLLLLLLLLLLLLLLLLL.LLLLLLLL
+...L........L....L.L.LL.LL.L.L.....L.L..L.....LL....L..L.L.L..L..L.L...L.........L.LL.LLLLL..L....
+LLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLL..LLLL.LLLLLLL.LLLLLLLLLLL.LLL.L.LLLLLLLLLLLLLLLL
+LLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLLLL.LLLLL.L.LLLLLLLL
+LLLLLLLLL.LLLLLLLLLLLLL.LL.LLLLLLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLL.LLLLL.LLLLLLL..LLLLLLL
+LLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLL
+..LLLL.L..LL.L......LL.L...L.L..L....LLL.........L....L.......LL.LLL.L.L.....LL.L...L.LLL....L....
+LLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLL.L.LLL.LLLLLLL.LLLL.LLLLLL.LLLL..LLLLLLL.LLLLLLLL
+LLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLL.LLLLLLLLLLLL.LLLLLLLLL.L.LLLLLLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLL
+LLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLL.LLLLLLL.LLLL.LLLLLLLLLLLLLLLLLLLL.LLLLLLLL
+LLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLL
+LLLLLLLLLLLLLLLLLLLL.LL.LLLLLLLL.LLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLL.LLLLLL.LLLLL.LLLLLLLLLLLLLLLL
+LLLL.LLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLL.LLLLL.LLLLLLL.LLLL.LLLLLLLLLLLL.LLLLLLL.LLLLLLLL
+LL...LLLLL.....LL..L.....L....L......L.L........LL......LL.LL..L..LLL.L...L..L..L.L.....LLLL...LLL
+LLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLL
+LLLLLLLLLLLLLLL.LLLLLLL.LL.LLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLL
+LLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLL.LLLLLLLLLLLLL.LLLL.LLLLLL.LLLLL.LLLLLLL.LLLLLLLL
+LLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLL.LLLLLL.LLLLLLLLLLLLL.LLLLLLLL
+LLLLLLLLL.LLLLL.LLLLLLL.LLLLL.LLL.LLLLLLL.LLLLLLL.LLLLLLLLLLLLL.LLLL.LLLLLL.LLLLL.LLLLLLLLLLLLLLLL
+.LL..L.....LLLL.LL..L.LL....L.LL...L..LL......L..LL...LL..L.L.LLLL...LL.L..L..LLL.L.L.....L.LL.LL.
+LLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLL
+LLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLL.LLLLL.LLLLLLLLL.LL.LLLLLLLLLLLL.LLLLLLL.LLLLLLLL
+LLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLL.LLLL.LLLLLLLLLLLL.LLLLLLL.LLLLLLLL
+LLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLL
+LLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLL.LLLLLLLLLLL.LLLL.LLLLL.LLLLLLL.LLLL.LLLLLLLLLLLLLLLLLLLL.LLLLL.LL
+LLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLL.LLLLLLLLLLLLLLLL
+LLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLL.LLLLLL.LLLLL.LLLLLLLLLLLLLLLL
+LLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLL.LLLL..LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL
+LLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLL.LLL.L.LLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLL.LLLLLLLL
diff --git a/2020/11/solve.c b/2020/11/solve.c
new file mode 100644
index 0000000..6fd8691
--- /dev/null
+++ b/2020/11/solve.c
@@ -0,0 +1,94 @@
+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define SIZE 10000
+#define X_MAX 99
+#define Y_MAX 97
+
+// Quite magical, isn't it?
+#define ADJACENT(x, y, p)                                                                          \
+	(x != 0 && y != 0 ? *(p - X_MAX - 1) == '#' : 0) + (y != 0 ? *(p - X_MAX) == '#' : 0) +    \
+		(x != X_MAX && y != 0 ? *(p - X_MAX + 1) == '#' : 0) +                             \
+		(x != 0 ? *(p - 1) == '#' : 0) + (x != X_MAX ? *(p + 1) == '#' : 0) +              \
+		(x != 0 && y != Y_MAX ? *(p + X_MAX - 1) == '#' : 0) +                             \
+		(y != Y_MAX ? *(p + X_MAX) == '#' : 0) +                                           \
+		(x != X_MAX && y != Y_MAX ? *(p + X_MAX + 1) == '#' : 0);
+
+int count(char *buf1, char *buf2)
+{
+	int x = 0, y = 0;
+	for (char *p = buf1; *p; p++) {
+		if (*p == '.') {
+			x++;
+			buf2[p - buf1] = '.';
+			continue;
+		}
+
+		if (*p == '\n') {
+			x = 0;
+			y++;
+			buf2[p - buf1] = '\n';
+			continue;
+		}
+
+		int cnt = ADJACENT(x, y, p);
+
+		if (*p == 'L' && !cnt) {
+			buf2[p - buf1] = '#';
+		} else if (*p == '#' && cnt >= 4) {
+			buf2[p - buf1] = 'L';
+		} else {
+			buf2[p - buf1] = *p;
+		}
+
+		x++;
+	}
+
+	if (memcmp(buf1, buf2, SIZE)) {
+		return count(buf2, buf1); // Swap buffers
+	} else {
+		int cnt = 0;
+		for (char *p = buf1; *p; p++) {
+			if (*p == '#')
+				cnt++;
+		}
+		return cnt;
+	}
+}
+
+int part_one(char *data)
+{
+	int res = 0;
+
+	char buf1[SIZE] = { 0 };
+	memcpy(buf1, data, SIZE);
+	char buf2[SIZE] = { 0 };
+	memcpy(buf2, data, SIZE);
+
+	return count(buf1, buf2);
+}
+
+int part_two(char *data)
+{
+	int res = 0;
+
+	return res;
+}
+
+int main(int argc, char *argv[])
+{
+	FILE *fp = fopen("input", "r");
+	if (!fp)
+		exit(EXIT_FAILURE);
+	char buf[SIZE] = { 0 };
+	fread(buf, SIZE, 1, fp);
+
+	printf("%d\n", part_one(buf));
+	printf("%d\n", part_two(buf));
+
+	fclose(fp);
+	return 0;
+}