# 1762. Buildings With an Ocean View

There are `n` buildings in a line. You are given an integer array `heights` of size `n` that represents the heights of the buildings in the line.

The ocean is to the right of the buildings. A building has an ocean view if the building can see the ocean without obstructions. Formally, a building has an ocean view if all the buildings to its right have a smaller height.

Return a list of indices (0-indexed) of buildings that have an ocean view, sorted in increasing order.

Example 1:

```Input: heights = [4,2,3,1]
Output: [0,2,3]
Explanation: Building 1 (0-indexed) does not have an ocean view because building 2 is taller.
```

Example 2:

```Input: heights = [4,3,2,1]
Output: [0,1,2,3]
Explanation: All the buildings have an ocean view.```

Example 3:

```Input: heights = [1,3,2,4]
Output: 
Explanation: Only building 3 has an ocean view.```

Example 4:

```Input: heights = [2,2,2,2]
Output: 
Explanation: Buildings cannot see the ocean if there are buildings of the same height to its right.```

Constraints:

• `1 <= heights.length <= 105`
• `1 <= heights[i] <= 109`

Solution1:

``````class Solution(object):
def findBuildings(self, heights):
"""
:type heights: List[int]
:rtype: List[int]
"""
if not heights:
return []

output = [len(heights)-1]
j = len(heights)-2
largest = heights[-1]

while j >= 0:
if heights[j] > largest:
output.append(j)
largest = heights[j]
j -= 1

return output[::-1]
``````

Solution2:

``````class Solution:
def findBuildings(self, heights):