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Number of Visible People in a Queue

Explore how to solve the problem of counting visible people in a queue by applying stack-based techniques. Understand the problem constraints and implement an efficient algorithm in C# to return the number of people each person can see to their right.

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].

Formally, person i can see person j if:

  • i<ji < j and min(heights[i],h ...