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题目：Remove the minimum number of invalid parentheses in order to make the input string valid. Return all possible results.Note: The input string may co... 阅读全文
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题目：Given an unsorted array of integers, find the length of longest increasing subsequence.For example,Given[10, 9, 2, 5, 3, 7, 101, 18],The longest in... 阅读全文
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题目： You are playing the following Bulls and Cows game with your friend: You write down a number and ask your friend to guess what the number is. Each 阅读全文
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题目： Given a binary tree, find the length of the longest consecutive sequence path. The path refers to any sequence of nodes from some starting node to 阅读全文
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题目： Serialization is the process of converting a data structure or object into a sequence of bits so that it can be stored in a file or memory buffer, 阅读全文
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题目： A group of two or more people wants to meet and minimize the total travel distance. You are given a 2D grid of values 0 or 1, where each 1 marks t 阅读全文