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Lattice paths Problem 15 Problem 15 Starting in the top left corner of a 2×2 grid, and only being able to move to the right and down, there are exactl 阅读全文
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By Lu.Qian. Question: Longest Collatz sequence Problem 14 Problem 14 The following iterative sequence is defined for the set of positive integers: n → 阅读全文
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Largest prime factor Problem 3 Problem 3 The prime factors of 13195 are 5, 7, 13 and 29. What is the largest prime factor of the number 600851475143 ? 阅读全文
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Smallest multiple Problem 5 Problem 5 2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder. What 阅读全文
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判断是否为空txt的方法 1 bool empty_file() 2 { 3 bool ret = 0; //初始化为0 4 ifstream fin; 5 fin.open("data.txt"); 6 if(fin.peek() == EOF) 7 ... 阅读全文
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感觉资料现在已经经查阅的差不多了。决定在这里理理思路。 首先是Introduction,这一段放在最后写吧,但现在也有些想法。 This essay will discuss the HCI on wearable devices. 关于在可穿戴设备上的交互,会谈到现在可穿戴式设备交互的的... 阅读全文
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一,本文为写essay所用,是一种思路的记录,也可视为我essay写作时的日志记录。 二,目前还处在资料搜集阶段。我是准备写 可穿戴式设备上的交互(interface),尤其是讨论用在 apple watch 和 Google glass上的技术。 三,就目前可知,用于apple watch上的新技 阅读全文