From 057afdc268f82a4c908f224dfc7c062894d5ee7d Mon Sep 17 00:00:00 2001
From: June McEnroe <june@causal.agency>
Date: Thu, 3 Dec 2020 01:27:16 -0500
Subject: Solve day 3 part 1

---
 2020/day03.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 2020/day03.c

(limited to '2020/day03.c')

diff --git a/2020/day03.c b/2020/day03.c
new file mode 100644
index 0000000..cd792a7
--- /dev/null
+++ b/2020/day03.c
@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+int main(void) {
+	char grid[512][32];
+	int h = 0;
+	while (EOF != scanf("%s\n", grid[h])) {
+		h++;
+	}
+	int w = strlen(grid[0]);
+	int trees = 0;
+	for (int x = 0, y = 0; y < h; x += 3, y += 1) {
+		trees += grid[y][x%w] == '#';
+	}
+	printf("%d\n", trees);
+}
-- 
cgit 1.4.1