[freemjstudio] WEEK 14 Solutions

binary-tree-level-order-traversal/freemjstudio.py

@@ -0,0 +1,31 @@
+from collections import deque
+
+# Definition for a binary tree node.
+# class TreeNode:
+#     def __init__(self, val=0, left=None, right=None):
+#         self.val = val
+#         self.left = left
+#         self.right = right
+class Solution:
+    def levelOrder(self, root: TreeNode | None) -> list[list[int]]:
+        visits = []
+
+        # bfs
+        queue = deque([])
+        queue.append(root)
+
+        while queue:
+            temp = []
+            for _ in range(len(queue)):
+                node = queue.popleft()
+                if node:
+                    temp.append(node.val)
+
+                if node and node.left:
+                    queue.append(node.left)
+                if node and node.right:
+                    queue.append(node.right)
+            if temp:
+                visits.append(temp)
+
+        return visits