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- If n is odd like 9, the sequence is as follows:
0 1 2 3 4 4 3 2 1 0
The sum of this sequence:
(0 + 1 + 2 + 3 + 4) + (0 + 1 + 2 + 3 + 4) = 2 * ((0 + 1 + 2 + 3 + 4))
It means twice the sum of the numbers 1 to int(9/2)
- If n is even, like 10, the sequence is as follows:
0 1 2 3 4 5 4 3 2 1 0
The sum of this sequence:
(0 + 1 + 2 + 3 + 4) + (4 + 3 + 2 + 1 + 0) + 5 = 2 * (0 + 1 + 2 +3 + 4) + 5
That is, double the sum of the numbers 1 to (n/2)-1 and then sum it with n/2.
- To add the numbers 1 to
nwe have:
(n * (n + 1))/2
C# .NET 5
- In the directory, run
dotnet build dotnet run
Reach out to the maintainer at one of the following places:
The original setup of this repository is by Hamid Molareza.
This solution is licensed under the GPLv3.