Package g2001_2100.s2073_time_needed_to_buy_tickets

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    2073 - Time Needed to Buy Tickets.

    Easy

    There are n people in a line queuing to buy tickets, where the <code>0<sup>th</sup></code> person is at the front of the line and the <code>(n - 1)<sup>th</sup></code> person is at the back of the line.

    You are given a 0-indexed integer array tickets of length n where the number of tickets that the <code>i<sup>th</sup></code> person would like to buy is tickets[i].

    Each person takes exactly 1 second to buy a ticket. A person can only buy 1 ticket at a time and has to go back to the end of the line (which happens instantaneously ) in order to buy more tickets. If a person does not have any tickets left to buy, the person will leave the line.

    Return the time taken for the person at position k(0-indexed) to finish buying tickets.

    Example 1:

    Input: tickets = 2,3,2, k = 2

    Output: 6

    Explanation:

    • In the first pass, everyone in the line buys a ticket and the line becomes 1, 2, 1.

    • In the second pass, everyone in the line buys a ticket and the line becomes 0, 1, 0.

    The person at position 2 has successfully bought 2 tickets and it took 3 + 3 = 6 seconds.

    Example 2:

    Input: tickets = 5,1,1,1, k = 0

    Output: 8

    Explanation:

    • In the first pass, everyone in the line buys a ticket and the line becomes 4, 0, 0, 0.

    • In the next 4 passes, only the person in position 0 is buying tickets.

    The person at position 0 has successfully bought 5 tickets and it took 4 + 1 + 1 + 1 + 1 = 8 seconds.

    Constraints:

    • n == tickets.length

    • 1 &lt;= n &lt;= 100

    • 1 &lt;= tickets[i] &lt;= 100

    • 0 &lt;= k &lt; n

    • 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 Integer timeRequiredToBuy(IntArray tickets, Integer k)

      • Methods inherited from class java.lang.Object

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