#!/usr/bin/python
i=0
n=1
list1=[]
list2=[]
while n>0:
    n=int(raw_input())
    list1.append(n)
    high=100
    while list1[i]>0:
        high*=0.7
        list1[i]-=1 
    list2.append(high)
    i+=1
n-=1
    
for x in range(len(list2)-1):
    print '%.2f'%list2[x]\