C++ and Java solutions based on BFS
C++ []\nclass Solution {\npublic:\n    int findBottomLeftValue(TreeNode* root) {\n        queue<TreeNode*> q;\n        q.push(root);\n        \n        while(!q
```C++ []\nclass Solution {\npublic:\n    int findBottomLeftValue(TreeNode* root) {\n        queue<TreeNode*> q;\n        q.push(root);\n        \n        while(!q.empty()) {\n            root=q.front(); // get the value before pop coz pop will not return anyy val\n            q.pop();\n            if (root->right) q.push(root->right);\n            if(root->left) q.push(root->left);\n        }\n        return root->val;\n        \n    }\n};\n```\n```Java []\nclass Solution {\n    public int findBottomLeftValue(TreeNode root) {\n        Queue<TreeNode> q = new LinkedList<>();\n        q.offer(root);\n\n        while(q.peek() != null) {\n            root = q.poll();\n            if(root.right !=null) q.offer(root.right);\n            if(root.left !=null) q.offer(root.left);\n        }\n        return root.val;\n    }\n}\n```
['Breadth-First Search', 'C', 'C++', 'Java']