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: 95ms
Memory: 24436kB
Author: jszxl
In contest: 1122 
n=100
while True:
   n=int(input())
   if n==0 :
        break
   s=100
   s=s*0.7**n
   print('%.2f'%(s))