F - Stone Land

In a country **Stone Land**, there are $N$ stones arranged in a row from left to right. Each stone has some height represented by a positive number. The stones are numbered from $1$ to $N$ from left to right. You are given an array **H** of size $N$ consisting of the height of the $N$ stones from left to right. Stone at $j^{th}$ position is visible from the stone at $i^{th}$ position if:-