Count Number of Possible Root Nodes

Count Pairs of Connectable Servers in a Weighted Tree Network

Count Paths That Can Form a Palindrome in a Tree

Count Subtrees With Max Distance Between Cities

Employee Importance

Find Elements in a Contaminated Binary Tree

Find Subtree Sizes After Changes

Frog Position After T Seconds

K-th Largest Perfect Subtree Size in Binary Tree

Maximum Points After Collecting Coins From All Nodes

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