Volcanic Eruption

There are $N$ positions along a line, each of which contains either a building (with positive height) or a volcano. You are given this information as an array $A$ of length $N$, where $A_i = 0$ represents a volcano at position $i$, and $A_i \gt 0$ represents a building with height $A_i$ at position $i$. Initially, the lava level is $0$. Every second, all the volcanoes erupt simultaneously, incr