山东大学(威海)程序设计竞赛2020新星赛(线上模拟赛)题解

factorial(数论,简单模拟)

In many applications very large integers numbers are required. Some of these applications are using keys for secure transmission of data, encryption, etc. In this problem you are given a number, you have to determine the number of digits in the factorial of the number.


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