摘要： Among all the factors of a positive integer N, there may exist several consecutive numbers. For example, 630 can be factored as 3×5×6×7, where 5, 6, a 阅读全文

摘要： Being unique is so important to people on Mars that even their lottery is designed in a unique way. The rule of winning is simple: one bets on a numbe 阅读全文

摘要： Given two sets of integers, the similarity of the sets is defined to be N​c​​/N​t​​×100%, where N​c​​ is the number of distinct common numbers shared 阅读全文

摘要： 转自：https://www.cnblogs.com/mfrbuaa/p/5319365.html 麻省理工学院线性代数课笔记。 1.一维投影 2.三维投影 最后还涉及到了最小二乘法的几何意义。也就是投影得到的公式啊！ 阅读全文

摘要： The basic task is simple: given N real numbers, you are supposed to calculate their average. But what makes it complicated is that some of the input n 阅读全文

摘要： 全文转自：https://www.cnblogs.com/gatherstars/p/6084696.html#commentform 这篇真的讲的清楚明白！要多复习！加深记忆！ 1.概述 AUC（Area Under roc Curve）是一种用来度量分类模型好坏的一个标准。这样的标准其实有很多， 阅读全文

摘要： On a broken keyboard, some of the keys are worn out. So when you type some sentences, the characters corresponding to those keys will not appear on sc 阅读全文

摘要： The string APPAPT contains two PAT's as substrings. The first one is formed by the 2nd, the 4th, and the 6th characters, and the second one is formed 阅读全文

摘要： Given a tree, you are supposed to tell if it is a complete binary tree. Input Specification: Each input file contains one test case. For each case, th 阅读全文

摘要： Zhejiang University has 40000 students and provides 2500 courses. Now given the student name lists of all the courses, you are supposed to output the 阅读全文