06 2018 档案
摘要：We are given an array A of positive integers, and two positive integers L and R (L <= R). Return the number of (contiguous, non-empty) subarrays such
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摘要：A Tic-Tac-Toe board is given as a string array board. Return True if and only if it is possible to reach this board position during the course of a va
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摘要：Let f(x) be the number of zeroes at the end of x!. (Recall that x! = 1 * 2 * 3 * ... * x, and by convention, 0! = 1.) For example, f(3) = 0 because 3!
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摘要：Given a string s and an array of strings words, return the number of words[i] that is a subsequence of s. A subsequence of a string is a new string ge
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摘要：S and T are strings composed of lowercase letters. In S, no letter occurs more than once. S was sorted in some custom order previously. We want to per
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摘要：You have two types of tiles: a 2 x 1 domino shape and a tromino shape. You may rotate these shapes. Given an integer n, return the number of ways to t
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摘要：You are playing a simplified Pacman game. You start at the point (0, 0), and your destination is (target[0], target[1]). There are several ghosts on t
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摘要：X is a good number if after rotating each digit individually by 180 degrees, we get a valid number that is different from X. Each digit must be rotate
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摘要：Vim是公认的终端编辑神器，配置文件设置的好，再加上各种功能的插件，更能使其如虎添翼，下面就分享出博主的配置文件，也是从网上大神那里拷过来的。配置文件在用户目录下~/.vimrc ,如果没有，就自己创建一个。 安装插件管家Vundle： 然后再建立一个插件的文件，如果没有，就创建一个 ~/.vimr
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摘要：A sorted list A contains 1, plus some number of primes. Then, for every p < q in the list, we consider the fraction p/q. What is the K-th smallest fra
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