leetcode - 1762. Buildings With an Ocean View

Description

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:

复制代码
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:

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

Example 3:

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

Constraints:

复制代码
1 <= heights.length <= 10^5
1 <= heights[i] <= 10^9

Solution

Iterate from right to left, only push those taller than top element into the stack.

Time complexity: o ( n ) o(n) o(n)

Space complexity: o ( n ) o(n) o(n)

Code

python3 复制代码
class Solution:
    def findBuildings(self, heights: List[int]) -> List[int]:
        stack = []
        for i in range(len(heights) - 1, -1, -1):
            if not stack or heights[stack[-1]] < heights[i]:
                stack.append(i)
        return stack[::-1]
相关推荐
CoovallyAIHub10 小时前
中科大DSAI Lab团队多篇论文入选ICCV 2025,推动三维视觉与泛化感知技术突破
深度学习·算法·计算机视觉
NAGNIP10 小时前
Serverless 架构下的大模型框架落地实践
算法·架构
moonlifesudo11 小时前
半开区间和开区间的两个二分模版
算法
moonlifesudo11 小时前
300:最长递增子序列
算法
CoovallyAIHub16 小时前
港大&字节重磅发布DanceGRPO:突破视觉生成RLHF瓶颈,多项任务性能提升超180%!
深度学习·算法·计算机视觉
CoovallyAIHub16 小时前
英伟达ViPE重磅发布!解决3D感知难题,SLAM+深度学习完美融合(附带数据集下载地址)
深度学习·算法·计算机视觉
聚客AI1 天前
🙋‍♀️Transformer训练与推理全流程:从输入处理到输出生成
人工智能·算法·llm
大怪v1 天前
前端:人工智能?我也会啊!来个花活,😎😎😎“自动驾驶”整起!
前端·javascript·算法
惯导马工2 天前
【论文导读】ORB-SLAM3:An Accurate Open-Source Library for Visual, Visual-Inertial and
深度学习·算法
骑自行车的码农2 天前
【React用到的一些算法】游标和栈
算法·react.js