Solution: Number of Visible People in a Queue
Explore the stack pattern to solve the problem of counting visible people in a queue based on height. Understand how to implement a monotonic decreasing stack to efficiently calculate visibility for each person, ensuring you grasp both the algorithm and its O(n) time and space complexity.
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We'll cover the following...
Statement
You are given an array heights representing n people standing in a queue, numbered from 0 to n - 1 from left to right. Each element heights[i] denotes the height of the person at position i. All heights are distinct.
A person at position i can see a person at position j (i < j) to their right if every person between them is shorter than both heights[i] and heights[j].
Forma ...