Start: Nov, 12, 2017 10:00:00
2017秋Python程序设计基础培训第二次作业
End: Nov, 19, 2017 12:00:00
Time elapsed:
Time remaining:
Problem_ID: C
Result: Accepted
Time: 101ms
Memory: 24436kB
Author: ajwuzhicheng
In contest: 1122 
ns=[]
n=int(input())
while n>0:
	ns.append(n)
	n=int(input())
for n in ns:
	print("%.2f"%(100*0.7**n))