"""
# Definition for a Node.
class Node:
def __init__(self, val=None, children=None):
self.val = val
self.children = children
"""
class Solution:
def preorder(self, root: 'Node') -> List[int]:
a = []
def trav(root):
if not root:
return
a.append(root.val)
for i in range(len(root.children)):
trav(root.children[i])
trav(root)
return a
34. Find First and Last Position of Element in Sorted Array | 33. Search in Rotated Sorted Array |
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1092. Shortest Common Supersequence | 1044. Longest Duplicate Substring |
1032. Stream of Characters | 987. Vertical Order Traversal of a Binary Tree |
952. Largest Component Size by Common Factor | 212. Word Search II |
174. Dungeon Game | 127. Word Ladder |
123. Best Time to Buy and Sell Stock III | 85. Maximal Rectangle |
84. Largest Rectangle in Histogram | 60. Permutation Sequence |
42. Trapping Rain Water | 32. Longest Valid Parentheses |
Cutting a material | Bubble Sort |
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Factorial equations | Removal of vertices |
Happy segments | Cyclic shifts |
Zoos | Build a graph |