Second Cheapest Present

The Bloggs family get invited to birthday parties all the time, and they feel they have to buy a present for whoever invited them. The problem is that they do not have much money.

So the family settled on a rule. When they walk into a shop to buy a present, they never buy the cheapest item, because that would look mean. They buy the second cheapest gift they can find in that shop instead. Given the shop's list of prices, find the second cheapest price.

The first line contains $N$, the number of prices ($2 \le N \le 100$).

Each of the next $N$ lines contains one price. A price is a decimal number written with two digits after the decimal point, and it carries no currency symbol. No price appears twice.

Print the second lowest price on a line by itself. Use the same format as the input, with two digits after the decimal point.