leetcode

Solution to some Leetcode problems written in C++
git clone git://git.dimitrijedobrota.com/leetcode.git
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1038.cpp (462B)

      1 class Solution {
      2   public:
      3     TreeNode *bstToGst(TreeNode *root) {
      4         TreeNode *head = root;
      5         stack<TreeNode *> st;
      6         int sum = 0;
      7         while (true) {
      8             while (root) {
      9                 st.push(root);
     10                 root = root->right;
     11             }
     12             if (st.empty()) break;
     13             root = st.top(), st.pop();
     14             sum = root->val += sum;
     15             root = root->left;
     16         }
     17         return head;
     18     }
     19 };