public int timeRequiredToBuy(int[] tickets, int k) {

int time = 0;

for (int i = 0 ; i < k ; i++) time += Math.min(tickets[i], tickets[k]);

for (int i = k + 1 ; i < tickets.length ; i++) time += Math.min(tickets[i], tickets[k] - 1);

return time + tickets[k];

}