res [terminology]
Terminology
Usage
- Use for a return collection or constructed output.
- Typical types include:
- Lists
- Nested lists
- Sets
- Mappings
- Constructed strings
res = []
q = deque([root])
while q:
level = []
for _ in range(len(q)):
node = q.popleft()
level.append(node.val)
# ...
res.append(level)
See 102. Binary Tree Level Order Traversal.