In [ ]:

    

import math

sum_arr = [None]*27
initial_sum = 1
sum_arr[0] = 1

for i in range(1, 27):
    sum_arr[i] = 1 + 2*sum_arr[i-1]

while True:
    input_param = raw_input()

    if input_param == "00e0":
        break

    tens_value = int(input_param[0])*10
    ones_value = int(input_param[1]) * 1

    num = tens_value + ones_value

    zeros_count = int(input_param[3])

    num *= math.pow(10, zeros_count)

    log_val = int(math.log(num, 2))

    output = sum_arr[log_val] - 2 * (sum_arr[log_val] - num)

    print int(output)