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: 97ms
Memory: 24436kB
Author: zhuzhu
In contest: 1122 
n=int(input())
while n!=0:
  h=100
  while n>0:
    h=h*0.7
    n-=1
  else:
    print('%.2f'%h)
    n=int(input())