Tick and Tick

描述

The three hands of the clock are rotating every second and meeting each other many times everyday. Finally, they get bored of this and each of them would like to stay away from the other two. A hand is happy if it is at least D degrees from any of the rest. You are to calculate how much time in a day that all the hands are happy.

输入

The input contains many test cases. Each of them has a single line with a real number D between 0 and 120, inclusively. The input is terminated with a D of -1.

输出

For each D, print in a single line the percentage of time in a day that all of the hands are happy, accurate up to 3 decimal places.

样例

样例输入 #1

0
120
90
-1

样例输出 #1

100.000
0.000
6.251

来源

ZJCPC2004
HDOJ-1006
题目来源:HDOJ-1006
时间限制:1000 MS
内存限制:32768 KB
Java 类名:Main
64 位整数占位符:%I64d