Binary Search Tree DFS Template
Two methods:
1. Traverse
2. Divide & Conquer
// Traverse: usually do not have return value
public class Solution {
public void traverse(TreeNode root) {
if (root == null)
return;
traverse(root.left);
traverse(root.right);
}
} // Divide & Conquer: usually have return value
public class Solution {
public ResultType traversal(TreeNode root) {
if (root == null) {
// do something and return
} // Divide
ResultType left = traversal(root.left);
ResultType right = traversal(root.right); // Conquer
ResultType merge = Merge from left to right.
return result;
}
}
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