## The Guthrie index of a positive number n is defined to be how many iterations of the above algorithm it takes before n becomes 1.

The Guthrie index of a positive number n is defined to be how many iterations of the above algorithm it takes before n becomes 1.
For example, the Guthrie index of the number 7 is 16 because the following sequence is 16 numbers long.
22, 11, 34, 17, 52, 26, 13, 40, 20, 10, 5, 16, 8, 4, 2, 1

## The Guthrie sequence of a positive number n is defined to be the numbers generated by the above algorithm.

Start with a positive number n if n is even then divide by 2
if n is odd then multiply by 3 and add 1 continue this until n becomes 1
The Guthrie sequence of a positive number n is defined to be the numbers generated by the above algorithm.

## The Stanton measure of an array is computed as follows. Count the number of 1s in the array. Let this count be n.

The Stanton measure of an array is computed as follows. Count the number of 1s in the array. Let this count be n. The Stanton measure is the number of times that n appears in the array. For example, the Stanton measure of {1, 4, 3, 2, 1, 2, 3, 2} is 3 because 1 occurs 2 times in the array and 2 occurs 3 times.

## c#四舍五入实现方法

C# 中没有四舍五入函数，事实上我知道的程序语言都没有四舍五入函数，因为四舍五入算法不科学，国际通行的是 Ba…

## A prime number is an integer that is divisible only by 1 and itself. A porcupine number is a prime number whose last digit is 9 and the next prime number that follows it also ends with the digit 9.

A prime number is an integer that is divisible only by 1 and itself. A porcupine number is a prime number whose last digit is 9 and the next prime number that follows it also ends with the digit 9.

## An array is defined to be inertial if the following conditions hold

An array is defined to be inertial if the following conditions hold

## Define a square pair to be the tuple where x and y are positive, non-zero integers, x

Define a square pair to be the tuple where x and y are positive, non-zero integers, x

## connectionstring属性尚未初始化3个解决方案-（huamaodashu.com)

connectionstring属性尚未初始化3个解决方案连接数据库时，提示”ConnectionString属性尚未初始化”

integer 可以为负数吗

## zigzag扫描简介

zigzag扫描是在图像处理里边使用的，比如采样、变换、量化、编码，在图像编码的算法中，需要将一个给定的方形矩阵进行Z字形扫描(Zigzag Scan)。给定一个n×n的矩阵，Z字形扫描的过程如下图所示：