Trip to Haroumpia

Annoula is planning a trip to Haroumpia, where the currency is the "hahanolira." She has gathered some money and wants to calculate how many hahanoliras she will have. She knows that ~1~ euro is equal to ~3~ chachanoliras.

The input is Annoula's money in euros.

The output is her money in hahanoliras.

Example

Input

50

Output

150