Create main.cpp

Author: JawadSher

17 - Binary Tree Data Structure Problems/20 - Left View of Binary Tree/main.cpp

@@ -0,0 +1,19 @@
+class Solution {
+  private: 
+    void solve(Node* root, vector<int> &ans, int level){
+        if(root == NULL) return;
+        
+        if(level == ans.size()) ans.push_back(root -> data);
+        
+        solve(root -> left, ans, level+1);
+        solve(root -> right, ans, level+1);
+    }
+  public:
+    vector<int> leftView(Node *root) {
+        vector<int> ans;
+        
+        solve(root, ans, 0);
+        
+        return ans;
+    }
+};