Create 94. Binary Tree Inorder Traversal (#361)

94. Binary Tree Inorder Traversal

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+/**
+ * Definition for a binary tree node.
+ * struct TreeNode {
+ *     int val;
+ *     TreeNode *left;
+ *     TreeNode *right;
+ *     TreeNode() : val(0), left(nullptr), right(nullptr) {}
+ *     TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}
+ *     TreeNode(int x, TreeNode *left, TreeNode *right) : val(x), left(left), right(right) {}
+ * };
+ */
+   #include <bits/stdc++.h>
+#pragma GCC optimize("O3")
+#pragma GCC optimize("Ofast", "inline", "ffast-math", "unroll-loops", "no-stack-protector")
+#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native", "f16c")
+static const auto DPSolver = []()
+{ std::ios_base::sync_with_stdio(false); std::cin.tie(nullptr); std::cout.tie(nullptr); return 'c'; }();
+using namespace std;
+
+class Solution {
+public:
+
+void inorderTrav(TreeNode*node, vector<int>&res){
+    if(!node)
+        return;
+    if (!node->left && !node->right)
+     {
+        res.push_back(node->val); 
+        return; 
+     }    
+    if (node->left)
+        inorderTrav(node->left, res); 
+    res.push_back(node->val); 
+    if (node->right)
+        inorderTrav(node->right, res); 
+
+}
+
+vector<int> inorderTraversal(TreeNode *root)
+{
+    DPSolver;
+    vector<int> res; 
+    inorderTrav(root, res); 
+    return res; 
+}
+};