1
var timeRequiredToBuy = function (tickets, k) {
2
  let countTime = 0;
3

4
  while (tickets[k] !== 0) {
5
    for (let i = 0; i < tickets.length; i++) {
6
      if (tickets[k] == 0) {
7
        return countTime;
8
      }
9
      if (tickets[i] !== 0) {
10
        tickets[i] = tickets[i] - 1;
11
        countTime++;
12
      }
13
    }
14
  }
15

16
  return countTime;
17
};