Package g1901_2000.s1944_number_of_visible_people_in_a_queue

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    1944 - Number of Visible People in a Queue.

    Hard

    There are n people standing in a queue, and they numbered from 0 to n - 1 in left to right order. You are given an array heights of distinct integers where heights[i] represents the height of the <code>i<sup>th</sup></code> person.

    A person can see another person to their right in the queue if everybody in between is shorter than both of them. More formally, the <code>i<sup>th</sup></code> person can see the <code>j<sup>th</sup></code> person if i &lt; j and min(heights[i], heights[j]) &gt; max(heights[i+1], heights[i+2], ..., heights[j-1]).

    Return an array answer of length n where answer[i] is the number of people the <code>i<sup>th</sup></code> person can see to their right in the queue.

    Example 1:

    Input: heights = 10,6,8,5,11,9

    Output: 3,1,2,1,1,0

    Explanation:

    Person 0 can see person 1, 2, and 4.

    Person 1 can see person 2.

    Person 2 can see person 3 and 4.

    Person 3 can see person 4.

    Person 4 can see person 5.

    Person 5 can see no one since nobody is to the right of them.

    Example 2:

    Input: heights = 5,1,2,3,10

    Output: 4,1,1,1,0

    Constraints:

    • n == heights.length

    • <code>1 <= n <= 10<sup>5</sup></code>

    • <code>1 <= heightsi<= 10<sup>5</sup></code>

    • All the values of heights are unique.

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final IntArray canSeePersonsCount(IntArray heights)

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait