1 files changed, 13 insertions, 0 deletions

diff --git a/mat/advent/6/prog.c b/mat/advent/6/prog.c
new file mode 100644
index 0000000..14eb68a
--- /dev/null
+++ b/mat/advent/6/prog.c
@@ -0,0 +1,13 @@
+#include <stdio.h>
+#include <stdlib.h>
+int main (int argc, char ** argv) {
+	double x;
+	size_t s = 0;
+	for (double a = 1; a <= 2020; a++) {
+		x = ((float)7/(float)5)*(float)a;
+		if (x == (int)x)
+			s++;
+	}
+	fprintf(stderr, "%lu\n", s);
+	return 0;
+}