04 2018 档案
摘要：Design a search autocomplete system for a search engine. Users may input a sentence (at least one word and end with a special character '#'). For each
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摘要：Given a string, we can "shift" each of its letter to its successive letter, for example: "abc" -> "bcd". We can keep "shifting" which forms the sequen
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摘要：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 any
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摘要：Given an unsorted array of integers, find the length of the longest consecutive elements sequence. For example,Given [100, 4, 200, 1, 3, 2],The longes
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摘要：Implement a basic calculator to evaluate a simple expression string. The expression string contains only non-negative integers, +, -, *, / operators a
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摘要：Implement a basic calculator to evaluate a simple expression string. The expression string may contain open ( and closing parentheses ), the plus + or
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