Skip to content

Problem 20 in C# #195

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
frangiz wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Problem 20 in C# #195

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
32 changes: 32 additions & 0 deletions C#/20.Factorial Digit Sum/frangiz.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,32 @@
using System;
using System.Numerics;
using System.Linq;

namespace FactorialDigitSum
{
public class MainClass
{
public static void Main()
{
BigInteger number = factorial(new BigInteger(100));

int ans = 0;
foreach (char c in number.ToString())
{
ans += c - '0';
}
Console.WriteLine(ans);
}

private static BigInteger factorial(BigInteger n)
{
BigInteger res = new BigInteger(1);
while (n > 1)
{
res *= n;
n -= 1;
}
return res;
}
}
}
2 changes: 1 addition & 1 deletion README.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -49,7 +49,7 @@ Happy Contributing! 😃
| 17 | [Number letter counts](https://projecteuler.net/problem=17) | | | | :white_check_mark: | | | | | | | | |
| 18 | [Maximum path sum I](https://projecteuler.net/problem=18) | | | | :white_check_mark: | | | | | | | | |
| 19 | [Counting Sundays](https://projecteuler.net/problem=19) | | | | | | | | | | | | |
| 20 | [Factorial digit sum](https://projecteuler.net/problem=20) | | :white_check_mark: | | :white_check_mark: | :white_check_mark: | | | | | | | |
| 20 | [Factorial digit sum](https://projecteuler.net/problem=20) | | :white_check_mark: | | :white_check_mark: | :white_check_mark: | | | :white_check_mark: | | | | |
| 21 | [Amicable numbers](https://projecteuler.net/problem=21) | | | | | | | | | | | | |
| 22 | [Names scores](https://projecteuler.net/problem=22) | | | | :white_check_mark: | | | | | | | | |
| 23 | [Non-abundant sums](https://projecteuler.net/problem=23) | | | | | | | | | | | | |
Expand Down