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-rw-r--r--tree/data_structures.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/tree/data_structures.h b/tree/data_structures.h
new file mode 100644
index 0000000..dbc7bdc
--- /dev/null
+++ b/tree/data_structures.h
@@ -0,0 +1,14 @@
+#ifndef DATA_STRUCTURES_H
+#define DATA_STRUCTURES_H
+
+struct node {
+ int val;
+ struct node *left;
+ struct node *right;
+};
+
+extern struct node *root;
+
+struct node *insert(struct node* cur, int val);
+
+#endif