Why You Should Remove Inactive Subscribers from Your Email List

  • 时间：2020-09-10 12:50:03
  • 分类：网络文摘
  • 阅读：92 次
Email marketing is all about engagement: how many people open and click through your emails. If you manage to get them to reply or forward your messages, you know you’re sending great content. But every list has inactive subscribers, as we... ...

5 Most Important SEO Keyword Metrics, Explained

  • 时间：2020-09-10 12:50:03
  • 分类：网络文摘
  • 阅读：104 次
Search engine optimization and keyword selection can be a tricky horse to tame especially for blogging beginners. There are metrics on top of metrics and layers upon layers of information you need to process. However, it doesn’t need to be ... ...

How to Use Priority Queue in Java or C++ to Compute Last Stone W

  • 时间：2020-09-10 12:45:51
  • 分类：网络文摘
  • 阅读：96 次
We have a collection of stones, each stone has a positive integer weight. Each turn, we choose the two heaviest stones and smash them together. Suppose the stones have weights x and y with x <= y. The result of this smash is: If x == y,... ...

Computing the Longest Recurring Cycle in its Decimal Fraction Pa

  • 时间：2020-09-10 12:45:51
  • 分类：网络文摘
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A unit fraction contains 1 in the numerator. The decimal representation of the unit fractions with denominators 2 to 10 are given: 1/2 = 0.5 1/3 = 0.(3) 1/4 = 0.25 1/5 = 0.2 1/6 = 0.1(6) 1/7 = 0.(142857) 1/8 = 0.125 1/9 = 0.(1) 1/10 = 0.1 ... ...

Digit factorials: Find the Sum of All the Curious Numbers

  • 时间：2020-09-10 12:45:51
  • 分类：网络文摘
  • 阅读：85 次
145 is a curious number, as 1! + 4! + 5! = 1 + 24 + 120 = 145. Find the sum of all numbers which are equal to the sum of the factorial of their digits. Note: as 1! = 1 and 2! = 2 are not sums they are not included. Pre-computing the Digit... ...

Power Digit Sum: What is the sum of the digits of the number 2^1

  • 时间：2020-09-10 12:45:51
  • 分类：网络文摘
  • 阅读：102 次
215 = 32768 and the sum of its digits is 3 + 2 + 7 + 6 + 8 = 26. What is the sum of the digits of the number 21000? You probably can compute the direct value of 2^1000. For example, in Python, you can obtain value of (2**1000) and convert... ...

Compute the Maximum Integer Right Triangles Solutions

  • 时间：2020-09-10 12:45:51
  • 分类：网络文摘
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If p is the perimeter of a right angle triangle with integral length sides, {a,b,c}, there are exactly three solutions for p = 120. {20,48,52}, {24,45,51}, {30,40,50} For which value of p ≤ 1000, is the number of solutions maximised? Maxi... ...

Compute Factorial Digit Sum: Find the sum of the digits in the n

  • 时间：2020-09-10 12:45:51
  • 分类：网络文摘
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n! means n × (n − 1) × … × 3 × 2 × 1 For example, 10! = 10 × 9 × … × 3 × 2 × 1 = 3628800, and the sum of the digits in the number 10! is 3 + 6 + 2 + 8 + 8 + 0 + 0 = 27. Find the sum of the digits in the number 100! Algorithm t... ...

How many different ways can £2 be made using any number of coins

  • 时间：2020-09-10 12:45:51
  • 分类：网络文摘
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In the United Kingdom the currency is made up of pound (£) and pence (p). There are eight coins in general circulation: 1p, 2p, 5p, 10p, 20p, 50p, £1 (100p), and £2 (200p). It is possible to make £2 in the following way: 1×£1 + 1×50p + 2×2... ...

Smallest Multiple Algorithm using Bruteforce or GCD/LCM

  • 时间：2020-09-10 12:45:51
  • 分类：网络文摘
  • 阅读：97 次
2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder. What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20? Bruteforce Algorithm to Find the ... ...