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Difficulty
Difficulty
EASY
MEDIUM
HARD
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Tags
9. Biggest Island
Depth-First Search
25m
12. Binary Tree Path Sum
Depth-First Search
10m
13. BiTree Cousins
Depth-First Search
15m
24. Check if Binary Tree is Uni-valued
Depth-First Search
15m
42. Count Closed Islands
Depth-First Search
25m
43. Counting Islands
Depth-First Search
25m
60. Flood Fill
Depth-First Search
15m
74. Invert Binary Tree
Depth-First Search
10m
80. Left Leaves
Depth-First Search
10m
92. Maximum Path Sum
Depth-First Search
30m
230. BiTree Depth Calculation
Depth-First Search
25m
237. Dependency Resolution
Depth-First Search
25m
240. BiTree Kth Min Value
Depth-First Search
20m
247. Subtree Check in BiTree
Depth-First Search
15m
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