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: 84ms
Memory: 21432kB
Author: 13757854779
In contest: 1086 
while True:
	c=100
	a=int(input())
	if a==0:
		break
	else:
		c=c*0.7**a
	print '%.2f' %c