Problem7189--公式计算

7189: 公式计算

[Creator : ]
Time Limit : 1.000 sec  Memory Limit : 256 MiB

SubmitSolved: 2Submit Num: 2StatisticsShowOff!

Description


Input


Output


Sample 1 Input 

6

Sample 1 Output 

8.00

Sample 2 Input 

7

Sample 2 Output 

13.00

Sample 3 Input 

9

Sample 3 Output 

34.00

Source/Category

 
Submit