Move leetcode solutions to subdir.

1 files changed, 37 insertions, 0 deletions

diff --git a/leetcode/cpp/897.cpp b/leetcode/cpp/897.cpp
new file mode 100644
index 0000000..efc9741
--- /dev/null
+++ b/leetcode/cpp/897.cpp
@@ -0,0 +1,37 @@
+/**

+ * Definition for a binary tree node.

+ * struct TreeNode {

+ *     int val;

+ *     TreeNode *left;

+ *     TreeNode *right;

+ *     TreeNode(int x) : val(x), left(NULL), right(NULL) {}

+ * };

+ */

+class Solution {

+public:

+    std::vector<TreeNode*> result;

+

+    void InOrderTraverse(TreeNode* root) {

+        if (root->left != nullptr)

+            InOrderTraverse(root->left);

+        result.push_back(root);

+        if (root->right != nullptr)

+            InOrderTraverse(root->right);

+    }

+

+    TreeNode* increasingBST(TreeNode* root) {

+        InOrderTraverse(root);

+

+        const auto end = result.end();

+        auto iter1 = result.begin();

+        auto iter2 = result.begin() + 1;

+        for (; iter2 != end; ++iter1, ++iter2) {

+            const auto node = *iter1;

+            node->left = NULL;

+            node->right = *iter2;

+        }

+        (*iter1)->left = (*iter1)->right = NULL;

+

+        return result.front();

+    }

+};