摘要：
Given a 2D board and a list of words from the dictionary, find all words in the board. Each word must be constructed from letters of sequentially adja 阅读全文
posted @ 2019-11-22 10:06
Schwifty
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Implement a basic calculator to evaluate a simple expression string. The expression string contains only non-negative integers, +, -, *, / operators a 阅读全文
posted @ 2019-11-22 07:04
Schwifty
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Write a SQL query to find all numbers that appear at least three times consecutively. + + + | Id | Num | + + + | 1 | 1 | | 2 | 1 | | 3 | 1 | | 4 | 2 | 阅读全文
posted @ 2019-11-22 02:56
Schwifty
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Given a positive integer, return its corresponding column title as appear in an Excel sheet. For example: 1 -> A 2 -> B 3 -> C ... 26 -> Z 27 -> AA 28 阅读全文
posted @ 2019-11-22 02:47
Schwifty
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Given a string which contains only lowercase letters, remove duplicate letters so that every letter appears once and only once. You must make sure you 阅读全文
posted @ 2019-11-22 00:13
Schwifty
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