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-rw-r--r--lib/graph.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/graph.h b/lib/graph.h
index 9c80dd6..cb47faa 100644
--- a/lib/graph.h
+++ b/lib/graph.h
@@ -1,4 +1,6 @@
+#pragma once
+
#include <inttypes.h>
#include <math.h>
#include <stdlib.h>