1 files changed, 4 insertions, 0 deletions
diff --git a/src/03/graph.h b/src/03/graph.h
index d295490..95c96d8 100644
--- a/src/03/graph.h
+++ b/src/03/graph.h
@@ -1,10 +1,14 @@
+#include <stdbool.h>
+
 typedef struct {
   char label;
 } Vertex;
 
 typedef struct {
   Vertex *vertices[128];
+  bool edges[128][128];
 } Graph;
 
 Graph *graph_initialize(void);
 Vertex *graph_add_vertex(Graph *graph, char label);
+void graph_add_edge(Graph *graph, Vertex *a, Vertex *b);