Given a binary tree, count the number of uni-value subtrees. A Uni-value subtree means all nodes of the subtree ...
Given a binary tree, count the number of uni value subtrees. A Uni value subtree means all nodes of the subtree have the same value. For example:Given binary tree, return . 給一個二叉樹,求唯一值子樹的個數。唯一值子樹的所有節點 ...
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Given a binary tree, count the number of uni-value subtrees. A Uni-value subtree means all nodes of the subtree ...
Given a binary tree, find the length of the longest path where each node in the path has the same ...
Given a non-negative integer n, count all numbers with unique digits, x, where 0 ≤ x < 10n. Example: Given n = 2, return 91. (The answer ...
You are given an integer array nums and you have to return a new counts array. The countsarray ha ...
Count the number of prime numbers less than a non-negative number, n. Example: References: How Many Primes Are There? Sieve ...
Define S = [s,n] as the string S which consists of n connected strings s. For example, ["abc", 3] ...
Given a binary tree, return all duplicate subtrees. For each kind of duplicate subtrees, you only need to return the root node of any oneof ...
Given a complete binary tree, count the number of nodes. Note: Definition of a complete binary tree from Wikipedia:In a complete binary tree ...