Minimal Inversions

Initially, Chef had an array $A$ of length $N$. Chef performs the following operation on $A$ **at most** once: - Select $L$ and $R$ such that $1 \le L \le R \le N$ and set $A_i := A_i + 1$ for all $L \le i \le R$. Determine the **maximum** number of *inversions* Chef can decrease from the array $A$ by applying the operation **at most** once. More formally, let the final array obtained after app