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: 121ms
Memory: 21432kB
Author: 13575562058
In contest: 1086 
while True:
	n=int(input())
	if n==0:
		break
	else:
		s=100
		s=s*0.7**n
		print '%.2f' % s