Solution: Nested Loop with Multiplication (Intermediate)

int n = 10; // 'n' can be anything, this is just an example
int sum = 0;
double pie = 3.14;
for (int i = 1; i < n; i += 3)
{
    int j = 1;
    System.Console.WriteLine(pie);
    while (j < n)
    {
        sum += 1;
        j *= 3;
    }
}
System.Console.WriteLine(sum); // O(1)