Create main.cpp

Author: JawadSher

17 - Binary Tree Data Structure Problems/22 - Binary Tree Right Side View/main.cpp

@@ -0,0 +1,31 @@
+/**
+ * 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) {}
+ * };
+ */
+class Solution {
+private:
+    void solve(TreeNode* root, vector<int> & ans, int level){
+        if(root == NULL) return;
+
+        if(level == ans.size()) ans.push_back(root -> val);
+
+        solve(root -> right, ans, level+1);
+        solve(root -> left, ans, level+1);
+
+    }
+public:
+    vector<int> rightSideView(TreeNode* root) {
+        vector<int> ans;
+
+        solve(root, ans, 0);
+
+        return ans;
+    }
+};