Create 0783-minimum-distance-between-bst-nodes.js

Author: aadil42

javascript/0783-minimum-distance-between-bst-nodes.js

@@ -0,0 +1,38 @@
+/**
+ * Definition for a binary tree node.
+ * function TreeNode(val, left, right) {
+ *     this.val = (val===undefined ? 0 : val)
+ *     this.left = (left===undefined ? null : left)
+ *     this.right = (right===undefined ? null : right)
+ * }
+ */
+/**
+ * DFS (level order traversal)
+ * Time O(n) | Space O(n)
+ * https://leetcode.com/problems/minimum-distance-between-bst-nodes/
+ * @param {TreeNode} root
+ * @return {number}
+ */
+var minDiffInBST = function(root) {
+    
+    const sortedArr = [];
+
+    // levelOrderTraversal
+    const dfs = (node) => {
+        if(!node) return;
+
+        dfs(node.left);
+        sortedArr.push(node.val)
+        dfs(node.right);
+    }
+
+    dfs(root);
+
+    let min = Infinity;
+
+    for(let i = 1; i < sortedArr.length; i++) {
+        min = Math.min(min, sortedArr[i] - sortedArr[i-1]);
+    }
+
+    return min;
+};