摘要：
On a broken keyboard, some of the keys are always stucked. So when you type some sentences, the characters corresponding to those keys will appear rep 阅读全文
摘要：
Given a set of N (>) positive integers, you are supposed to partition them into two disjoint sets A1 and A2 of n1 and n2 numbers, respecti 阅读全文
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This time, you are supposed to help us collect the data for family-owned property. Given each person's family members, and the estate（房产）info under hi 阅读全文
摘要：
A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes 阅读全文