A New Quadratic Bound for the Manickam-Mikl\'os-Singhi Conjecture

More than twenty-five years ago, Manickam, Miklos, and Singhi conjectured that for positive integers $n,k$ with $n\ge 4k$, every set of $n$ real numbers with nonnegative sum has at least $\left(\genfrac{}{}{0px}{}{n-1}{k-1}\right)$ $k$-element subsets whose sum is also nonnegative. We verify this conjecture when $n \geq 8k^2$, which simultaneously improves and simplifies a bound of Alon, Huang, and Sudakov and also a bound of Pokrovskiy when $k<{10}^{45}$.