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: 139ms
Memory: 21432kB
Author: shanzhenyu
In contest: 1086

while True:
	n = int(raw_input().strip())
	if n == 0:
		break
	else:
		s = 100 * 0.7**n
		print '%.2f' % s