Update inorder-successor-in-bst.cpp

JeremyHide · Sep 22, 2015 · 1fff0ea · 1fff0ea
1 parent 169841a
commit 1fff0ea
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/C++/inorder-successor-in-bst.cpp b/C++/inorder-successor-in-bst.cpp
@@ -14,7 +14,7 @@ class Solution {
 public:
     TreeNode* inorderSuccessor(TreeNode* root, TreeNode* p) {
         // If it has right subtree.
-        if (p->right) {
+        if (p && p->right) {
             p = p->right;
             while (p->left) {
                 p = p->left;