message: Update equal-tree-partition.cpp
diff: @@ -22,13 +22,13 @@ public:
  }
  private:
  - int getSumHelper(TreeNode* root, unordered_map<int, int> *lookup) {
  - if (!root) {
  + int getSumHelper(TreeNode* node, unordered_map<int, int> *lookup) {
  + if (!node) {
  return 0;
  }
  - int total = root->val +
  - getSumHelper(root->left, lookup) +
  - getSumHelper(root->right, lookup);
  + int total = node->val +
  + getSumHelper(node->left, lookup) +
  + getSumHelper(node->right, lookup);
  ++(*lookup)[total];
  return total;
  }
  