As said in comments, no hope for a closed form result.
You are looking for the zero's of function
$$f(n)=99n + \log(n)- \log^2(n)$$ for which
$$f'(n)=\frac{1}{n}-\frac{2 \log (n)}{n}+99$$
$$f''(n)=\frac{2 \log (n)}{n^2}-\frac{3}{n^2}$$
The first derivative cancels at
$$n_*=-\frac{2}{99} W\left(-\frac{99 \sqrt{e}}{2}\right)$$ where appears Lambert function but, since its argument is $ < - \frac 1e$, this is not a real. This makes the derivative to be positive for any value of $n$.
For inspection, let $n=\frac{1}{e^{k}}$ and you will notice that the function change sign between $k=2$ and $k=3$. So, start Newton method with $n_0=\frac{1}{e^{5/2}}$. You should get the following iterates
$$\left(
\begin{array}{cc}
m & n_m \\
0 & 0.08208499862 \\
1 & 0.08570849302 \\
2 & 0.08575340627 \\
3 & 0.08575341274
\end{array}
\right)$$