1009: 买铅笔

Memory Limit:128 MB Time Limit:1.000 S
Judge Style:Text Compare Creator:
Submit:61 Solved:30

Description

铅笔2.5元一支,小明买了n支笔,求他一共需要多少钱?

Input

输入要买的铅笔数量

Output

输出买铅笔一共需要多少钱

Sample Input Copy

2

Sample Output Copy

5.0