Chandelier

A linear chandelier is held up by $N$ supports. The $i^{th}$ support initially holds up a weight $W_i$, and will collapse if the weight on it is **more than or equal to** $A_i$. Note that initially, $W_i \lt A_i$ for all $1 \le i \le N$. Whenever $W_i\ge A_i$ for some support, the following happens: - The $i^{th}$ support is destroyed; - Let $x$ and $y$ be uniformly random non-negative integers