Start: Apr, 17, 2017 10:00:00
Python程序设计基础培训第二次作业
End: Apr, 23, 2017 14:00:00
Time elapsed:
Time remaining:
Problem_ID: C
Result: Accepted
Time: 129ms
Memory: 21432kB
Author: 13967581231
In contest: 1086 
n=int(raw_input())
s=100
i=1
while n!=0:
	while i<=n:
		s=s*0.7
		i=i+1
	print '%.2f'%s
	n=int(raw_input())