Time Needed to Buy Tickets

There are n people in a line queuing to buy tickets. The 0th person is at the front, and the (n-1)th person is at the back. An integer array tickets represents the number of tickets each person wants to buy. Each person takes exactly 1 second to buy a ticket and must go back to the end of the line to purchase another if needed. Return the time taken for the person initially at position k to finish buying their tickets.

Constraints

• n == tickets.length
• 1 <= n <= 100
• 1 <= tickets[i] <= 100
• 0 <= k < n