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Factorial is an operational symbol invented by Kiston Kaman (Christian kramp,1760~1826) in 1808 and is a mathematical term. A positive integer.factorialEnglishfactorial) is the product of all positive integers less than and equal to the number, and

Recently a pile of questions to fill, has been salted fish, fill a pile of water problems are not necessary to write a problem. Forget about this formula.The meaning of the Stirling formula is that when n is large enough, n! is very difficult to

LightOJ-1045 Digits of factorial
Time Limit: 2000MS
Memory Limit: 32768KB
64bit IO Format: %lld &%llu
Submit StatusDescriptionFactorial of an integer was defined by the following

There are several types of factorial problems:
1. Calculate the number of 0 at the end of the factorial, divide it by 5, and accumulate.
2. How many digits are there in the result of factorial? stirling formula: n! ≈ Sqrt (2 * PI * n) * (n/e) ^ n,

The algorithm of factorial is more than two aspects: first, high precision computation and the second is related to number theory.
First, the high precision calculation factorial
This is actually the least technical content of the problem, but

There are several types of factorial problems:
1. Calculate the number of 0 at the end of the factorial, divide it by 5, and accumulate.
2. How many digits are there in the result of factorial? STIRLING formula: n! ≈ SQRT (2 * pI * n) * (N/E) ^ N,

Find the number of digits of a number factorialFlyfish 2015-8-15For example 7! =5040, the factorial result of 7 is 4 digits (10 binary)Ask for a number of digits1 Loop methodint get_digit_loop(int N) { int0; do { digit ++; while100

Don't be intimidated by factorial. DescriptionFactorial (factorial) is a very interesting function, but a lot of people are afraid of it, let's look at two factorial-related problems:Question 1. Given an integer n, then the factorial n of n! How

Factorial (factorial) is a very interesting function, but many people are afraid of it, let's take a look at two factorial-related problems:
1,
given an integer n, then n's factorial n! How many 0 at the end? For example: n=10,n! =3 628 800,n! Has

The following documents are from: qiaocang Middle School, Jiangmen City, Guangdong Province.
Program: (calculate the exponent of a prime factor contained in the factorial)
(1 ),
Int cal (int n, int p)
{
If (n
Return 0

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